joyce8/EMBER2024-capa huggingface dataset:
Function at 0x475fc0
Capabilities:
Encode data using xor
Hash data with crc32

Disassembly:
test ecx, ecx
jne 0x475fc7
xor eax, eax
ret
push esi
not eax
cmp edx, 8
jb 0x4760a4
mov esi, edx
shr esi, 3
push edi
lea esp, [esp]
movzx edi, byte [ecx]
xor edi, eax
and edi, 0xff
shr eax, 8
xor eax, dword [edi*4 + 0x4dd0a0]
movzx edi, byte [ecx + 1]
xor edi, eax
and edi, 0xff
inc ecx
shr eax, 8
xor eax, dword [edi*4 + 0x4dd0a0]
movzx edi, byte [ecx + 1]
xor edi, eax
and edi, 0xff
inc ecx
shr eax, 8
xor eax, dword [edi*4 + 0x4dd0a0]
movzx edi, byte [ecx + 1]
xor edi, eax
inc ecx
and edi, 0xff
shr eax, 8
xor eax, dword [edi*4 + 0x4dd0a0]
movzx edi, byte [ecx + 1]
xor edi, eax
inc ecx
and edi, 0xff
shr eax, 8
xor eax, dword [edi*4 + 0x4dd0a0]
movzx edi, byte [ecx + 1]
xor edi, eax
inc ecx
and edi, 0xff
shr eax, 8
xor eax, dword [edi*4 + 0x4dd0a0]
movzx edi, byte [ecx + 1]
inc ecx
xor edi, eax
and edi, 0xff
shr eax, 8
xor eax, dword [edi*4 + 0x4dd0a0]
movzx edi, byte [ecx + 1]
inc ecx
xor edi, eax
and edi, 0xff
shr eax, 8
xor eax, dword [edi*4 + 0x4dd0a0]
inc ecx
sub edx, 8
sub esi, 1
jne 0x475fe0
pop edi
test edx, edx
je 0x4760cb
jmp 0x4760b0
movzx esi, byte [ecx]
xor esi, eax
and esi, 0xff
shr eax, 8
xor eax, dword [esi*4 + 0x4dd0a0]
inc ecx
sub edx, 1
jne 0x4760b0
not eax
pop esi
ret

Function at 0x4760d0
Capabilities:
Generate random numbers using the delphi lcg
Hash data with crc32

Disassembly:
mov eax, dword [edx]
movsx ecx, cl
xor ecx, eax
shr eax, 8
and ecx, 0xff
mov ecx, dword [ecx*4 + 0x4dd0a0]
xor ecx, eax
movzx eax, cl
add eax, dword [edx + 4]
mov dword [edx], ecx
mov ecx, dword [edx + 8]
imul eax, eax, 0x8088405
inc eax
mov dword [edx + 4], eax
shr eax, 0x18
xor eax, ecx
and eax, 0xff
shr ecx, 8
xor ecx, dword [eax*4 + 0x4dd0a0]
mov dword [edx + 8], ecx
ret

Function at 0x476120
Capabilities:
Generate random numbers using the delphi lcg
Hash data with crc32

Disassembly:
mov ecx, dword [esi + 8]
push ebx
mov edx, ecx
and edx, 0xfffd
or edx, 2
mov ebx, edx
xor ebx, 1
imul ebx, edx
mov edx, dword [esi]
shr ebx, 8
push edi
xor al, bl
movsx edi, al
xor edi, edx
shr edx, 8
and edi, 0xff
mov ebx, dword [edi*4 + 0x4dd0a0]
xor ebx, edx
movzx edx, bl
add edx, dword [esi + 4]
mov dword [esi], ebx
imul edx, edx, 0x8088405
inc edx
mov dword [esi + 4], edx
shr edx, 0x18
xor edx, ecx
and edx, 0xff
shr ecx, 8
xor ecx, dword [edx*4 + 0x4dd0a0]
pop edi
mov dword [esi + 8], ecx
pop ebx
ret
Function at 0x476ae0
Capabilities:
Read file on windows

Disassembly:
push ebp
mov ebp, esp
push ecx
push ebx
mov ebx, dword [ebp + 0xc]
push edi
mov edi, ebx
imul edi, dword [ebp + 0x10]
cmp byte [esi], 0
je 0x476b1d
mov ecx, dword [ebp + 8]
mov edx, dword [esi + 4]
push 0
lea eax, [ebp + 0xc]
push eax
push edi
push ecx
push edx
call dword [sym.imp.KERNEL32.dll_ReadFile]
test eax, eax
jne 0x476b11
mov byte [esi + 8], 1
mov eax, dword [ebp + 0xc]
xor edx, edx
div ebx
pop edi
pop ebx
pop ecx
pop ebp
ret
mov edx, dword [esi + 0x28]
mov ebx, dword [esi + 0x2c]
xor eax, eax
mov ecx, edi
add ecx, edx
adc eax, ebx
cmp eax, dword [esi + 0x24]
jb 0x476b3c
ja 0x476b37
cmp ecx, dword [esi + 0x20]
jbe 0x476b3c
mov edi, dword [esi + 0x20]
sub edi, edx
cmp dword [esi + 0x34], 0
mov eax, dword [ebp + 8]
je 0x476b84
push eax
mov eax, dword [esi + 0x3c]
push 0
push edi
push ebx
push edx
push ecx
sub eax, 0x10
mov dword [ebp + 0x10], esp
mov ebx, esp
push eax
call fcn.00423f4c
add eax, 0x10
mov dword [ebx], eax
mov ecx, dword [esi + 0x38]
add esp, 4
push ecx
mov ecx, dword [esi + 0x34]
call fcn.0047aaf0
add dword [esi + 0x28], edi
mov eax, edi
adc dword [esi + 0x2c], 0
xor edx, edx
div dword [ebp + 0xc]
pop edi
pop ebx
pop ecx
pop ebp
ret
mov edx, dword [esi + 0x30]
add edx, dword [esi + 0x28]
push edi
push edx
push eax
call fcn.004a5010
add esp, 0xc
add dword [esi + 0x28], edi
mov eax, edi
pop edi
adc dword [esi + 0x2c], 0
xor edx, edx
div dword [ebp + 0xc]
pop ebx
pop ecx
pop ebp
ret
Function at 0x477d60
Capabilities:
Get common file path

Disassembly:
push ebp
mov ebp, esp
push 0xffffffffffffffff
push 0x4c0878
mov eax, dword fs:[0]
push eax
sub esp, 8
push esi
push edi
mov eax, dword [0x4efc64]
xor eax, ebp
push eax
lea eax, [ebp - 0xc]
mov dword fs:[0], eax
mov dword [ebp - 4], 0
cmp dword [ebx], 0
jne 0x477eda
cmp dword [ebx + 4], 0xffffffff
jne 0x477eda
lea edi, [ebx + 0x203c]
push edi
push 0x1000
call dword [sym.imp.KERNEL32.dll_GetCurrentDirectoryW]
mov eax, edi
lea edx, [eax + 2]
jmp 0x477dc0
mov cx, word [eax]
add eax, 2
test cx, cx
jne 0x477dc0
sub eax, edx
sar eax, 1
movzx eax, word [ebx + eax*2 + 0x203a]
cmp ax, 0x5c
je 0x477df9
cmp ax, 0x2f
je 0x477df9
add edi, 0xfffffffe
mov ax, word [edi + 2]
add edi, 2
test ax, ax
jne 0x477de6
mov eax, dword [0x4cb098]
mov dword [edi], eax
mov eax, dword [ebp + 0xc]
push ecx
add eax, 0xfffffff0
mov dword [ebp - 0x10], esp
mov esi, esp
push eax
call fcn.00423f4c
mov ecx, dword [ebp + 8]
add esp, 4
push ecx
lea edx, [ebp + 8]
add eax, 0x10
push edx
mov dword [esi], eax
call fcn.004767f0
add esp, 0xc
test eax, eax
jne 0x477e63
mov dword [ebp - 4], 0xffffffff
mov eax, dword [ebp + 0xc]
add eax, 0xfffffff0
lea ecx, [eax + 0xc]
or edx, 0xffffffff
lock xadd dword [ecx], edx
dec edx
test edx, edx
jg 0x477e4d
mov ecx, dword [eax]
mov edx, dword [ecx]
push eax
mov eax, dword [edx + 4]
call eax
mov eax, dword [ebp + 8]
mov ecx, dword [ebp - 0xc]
mov dword fs:[0], ecx
pop ecx
pop edi
pop esi
mov esp, ebp
pop ebp
ret 8
call fcn.00476f80
or edx, 0xffffffff
mov dword [ebx], eax
mov dword [ebp - 4], 0xffffffff
test eax, eax
mov eax, dword [ebp + 0xc]
jne 0x477eac
add eax, 0xfffffff0
lea ecx, [eax + 0xc]
lock xadd dword [ecx], edx
dec edx
test edx, edx
jg 0x477e94
mov ecx, dword [eax]
mov edx, dword [ecx]
push eax
mov eax, dword [edx + 4]
call eax
mov eax, 0x200
mov ecx, dword [ebp - 0xc]
mov dword fs:[0], ecx
pop ecx
pop edi
pop esi
mov esp, ebp
pop ebp
ret 8
add eax, 0xfffffff0
lea ecx, [eax + 0xc]
lock xadd dword [ecx], edx
dec edx
test edx, edx
jg 0x477ec5
mov ecx, dword [eax]
mov edx, dword [ecx]
push eax
mov eax, dword [edx + 4]
call eax
xor eax, eax
mov ecx, dword [ebp - 0xc]
mov dword fs:[0], ecx
pop ecx
pop edi
pop esi
mov esp, ebp
pop ebp
ret 8
mov dword [ebp - 4], 0xffffffff
mov eax, dword [ebp + 0xc]
add eax, 0xfffffff0
lea ecx, [eax + 0xc]
or edx, 0xffffffff
lock xadd dword [ecx], edx
dec edx
test edx, edx
jg 0x477f00
mov ecx, dword [eax]
mov edx, dword [ecx]
push eax
mov eax, dword [edx + 4]
call eax
mov eax, 0x1000000
mov ecx, dword [ebp - 0xc]
mov dword fs:[0], ecx
pop ecx
pop edi
pop esi
mov esp, ebp
pop ebp
ret 8
Function at 0x478680
Capabilities:
Check if file exists
Create directory
Get file attributes

Disassembly:
push ebp
mov ebp, esp
mov eax, 0x4004
call fcn.004aa4c0
mov eax, dword [0x4efc64]
xor eax, ebp
mov dword [ebp - 4], eax
push ebx
mov ebx, dword [ebp + 0xc]
push esi
mov esi, dword [ebp + 8]
test esi, esi
je 0x4786b8
push esi
call dword [sym.imp.KERNEL32.dll_GetFileAttributesW]
cmp eax, 0xffffffff
jne 0x4786b8
push 0
push esi
call dword [sym.imp.KERNEL32.dll_CreateDirectoryW]
movzx eax, word [ebx]
test ax, ax
je 0x4787a4
mov ecx, ebx
mov edx, ebx
movzx eax, ax
jmp 0x4786d0
cmp ax, 0x2f
je 0x4786dc
cmp ax, 0x5c
jne 0x4786de
mov ecx, edx
movzx eax, word [edx + 2]
add edx, 2
test ax, ax
jne 0x4786d0
push edi
cmp ecx, ebx
je 0x47871f
sub ecx, ebx
sar ecx, 1
add ecx, ecx
mov edi, ecx
push edi
lea eax, [ebp - 0x4004]
push ebx
push eax
call fcn.004a5010
lea edx, [ebp - 0x4004]
push edx
xor ecx, ecx
push esi
mov word [ebp + edi - 0x4004], cx
call fcn.00478680
add esp, 0x14
xor eax, eax
mov word [ebp - 0x2004], ax
test esi, esi
je 0x478745
lea edx, [ebp - 0x2004]
mov eax, esi
sub edx, esi
movzx ecx, word [eax]
mov word [edx + eax], cx
add eax, 2
test cx, cx
jne 0x478736
mov eax, ebx
mov edx, ebx
lea esp, [esp]
mov cx, word [eax]
add eax, 2
test cx, cx
jne 0x478750
lea edi, [ebp - 0x2004]
sub eax, edx
add edi, 0xfffffffe
mov cx, word [edi + 2]
add edi, 2
test cx, cx
jne 0x478766
mov ecx, eax
shr ecx, 2
mov esi, edx
rep movsd dword es:[edi], dword [esi]
mov ecx, eax
and ecx, 3
rep movsb byte es:[edi], byte [esi]
lea ecx, [ebp - 0x2004]
push ecx
call dword [sym.imp.KERNEL32.dll_GetFileAttributesW]
pop edi
cmp eax, 0xffffffff
jne 0x4787a4
push 0
lea edx, [ebp - 0x2004]
push edx
call dword [sym.imp.KERNEL32.dll_CreateDirectoryW]
mov ecx, dword [ebp - 4]
pop esi
xor ecx, ebp
pop ebx
call fcn.004a4491
mov esp, ebp
pop ebp
ret
Function at 0x479090
Capabilities:
Parse pe header
Read file via mapping

Disassembly:
push ebp
mov ebp, esp
sub esp, 8
push ebx
push esi
push edi
mov edi, dword [ebp + 0x10]
xor ebx, ebx
mov eax, 0x400000
cmp edi, ebx
ja 0x4790b6
jb 0x4790ae
cmp dword [ebp + 0xc], eax
jae 0x4790b6
mov eax, dword [ebp + 0xc]
mov dword [ebp - 4], edi
jmp 0x4790b9
mov dword [ebp - 4], ebx
push eax
mov eax, dword [ebp + 8]
push ebx
push ebx
push 4
push eax
call dword [sym.imp.KERNEL32.dll_MapViewOfFile]
mov ecx, eax
cmp ecx, ebx
jne 0x4790d7
xor eax, eax
pop edi
pop esi
pop ebx
mov esp, ebp
pop ebp
ret
mov edx, 0x5a4d
cmp word [ecx], dx
jne 0x479118
mov esi, dword [ecx + 0x3c]
mov eax, esi
cdq
cmp edx, edi
ja 0x479118
jb 0x4790f2
cmp eax, dword [ebp + 0xc]
jae 0x479118
cmp dword [esi + ecx], 0x4550
jne 0x479118
mov edx, dword [esi + ecx + 0x54]
add edx, dword [esi + ecx + 0x24]
mov eax, dword [ebp + 0x14]
add edx, dword [esi + ecx + 0x20]
add edx, dword [esi + ecx + 0x1c]
mov dword [eax + 4], ebx
mov dword [eax], edx
mov ebx, 1
push ecx
call dword [sym.imp.KERNEL32.dll_UnmapViewOfFile]
pop edi
pop esi
mov eax, ebx
pop ebx
mov esp, ebp
pop ebp
ret
Function at 0x479430
Capabilities:
Get file size
Set file attributes

Disassembly:
push ebp
mov ebp, esp
sub esp, 0x14
push ebx
mov ebx, dword [edi + 0x84]
cmp dword [edi + 0x80], ebx
push esi
lea esi, [edi + 0x74]
jbe 0x47944e
call fcn.004a4f01
mov ecx, dword [esi + 0xc]
mov eax, dword [esi]
mov dword [ebp - 0x10], eax
mov dword [ebp - 8], ecx
cmp ecx, dword [esi + 0x10]
jbe 0x479466
call fcn.004a4f01
mov ecx, dword [ebp - 8]
mov edx, dword [ebp - 0x10]
mov eax, dword [esi]
push ebx
push edx
push ecx
push eax
lea eax, [ebp - 0x10]
push eax
call fcn.0047b860
xor ebx, ebx
cmp dword [edi + 0x18], ebx
je 0x479489
mov ecx, dword [edi]
push ebx
push ecx
call dword [sym.imp.KERNEL32.dll_SetFileAttributesW]
mov edx, dword [edi + 0x18]
mov eax, dword [edi]
push ebx
push ebx
neg edx
push 3
sbb edx, edx
push ebx
and edx, 0x40000000
push 3
add edx, 0x80000000
push edx
push eax
call dword [sym.imp.KERNEL32.dll_CreateFileW]
mov dword [edi + 4], eax
call dword [sym.imp.KERNEL32.dll_GetLastError]
mov eax, dword [edi + 4]
cmp eax, 0xffffffff
je 0x479530
lea ecx, [ebp - 8]
push ecx
push eax
mov dword [ebp - 8], ebx
call dword [sym.imp.KERNEL32.dll_GetFileSize]
cmp eax, 0xffffffff
jne 0x4794d7
or ecx, eax
or eax, eax
jmp 0x4794db
mov ecx, eax
xor eax, eax
push ebx
mov edx, ecx
push edx
push eax
mov dword [edi + 0x14], eax
xor eax, eax
cmp dword [edi + 0x18], ebx
mov dword [edi + 0x10], ecx
mov ecx, dword [edi + 4]
setne al
lea eax, [eax + eax + 2]
push eax
push ebx
push ecx
call dword [sym.imp.KERNEL32.dll_CreateFileMappingW]
mov dword [edi + 8], eax
cmp eax, ebx
jne 0x479512
mov eax, 9
pop esi
pop ebx
mov esp, ebp
pop ebp
ret 4
lea esi, [edi + 0x20]
cmp dword [ebp + 8], ebx
je 0x47953d
mov edx, dword [edi + 0x14]
mov ecx, dword [edi + 0x10]
push esi
push edx
push ecx
push eax
call fcn.00479090
add esp, 0x10
test eax, eax
jne 0x479542
mov eax, 1
pop esi
pop ebx
mov esp, ebp
pop ebp
ret 4
mov dword [esi], ebx
mov dword [esi + 4], ebx
mov edx, dword [edi + 0x14]
cmp edx, dword [esi + 4]
jb 0x479571
ja 0x479553
mov eax, dword [edi + 0x10]
cmp eax, dword [esi]
jbe 0x479571
mov ecx, edi
call fcn.00479ba0
test eax, eax
jne 0x479571
cmp dword [edi + 0x18], ebx
je 0x479571
mov ecx, dword [esi + 4]
mov edx, dword [esi]
push ecx
push edx
mov esi, edi
call fcn.00479380
pop esi
mov dword [edi + 0x8c], 1
xor eax, eax
pop ebx
mov esp, ebp
pop ebp
ret 4
Function at 0x47b420
Capabilities:
Get file size

Disassembly:
push ebp
mov ebp, esp
sub esp, 0x10
mov eax, dword [ebp + 8]
push ebx
push esi
push edi
xor ebx, ebx
push ebx
push 0x80
push 3
push ebx
push 1
push 0xc0000000
push eax
mov dword [ebp - 0x10], ebx
mov dword [ebp - 0xc], ebx
call dword [sym.imp.KERNEL32.dll_CreateFileW]
mov esi, eax
cmp esi, 0xffffffff
jne 0x47b47c
mov eax, dword [ebp + 8]
add eax, 0xfffffff0
lea ecx, [eax + 0xc]
or edx, esi
lock xadd dword [ecx], edx
dec edx
test edx, edx
jg 0x47b470
mov ecx, dword [eax]
mov edx, dword [ecx]
push eax
mov eax, dword [edx + 4]
call eax
mov eax, 7
pop edi
pop esi
pop ebx
mov esp, ebp
pop ebp
ret
lea ecx, [ebp - 4]
push ecx
push esi
mov dword [ebp - 4], ebx
call dword [sym.imp.KERNEL32.dll_GetFileSize]
cmp eax, 0xffffffff
jne 0x47b496
or eax, eax
or ecx, 0xffffffff
jmp 0x47b498
xor ecx, ecx
push ebx
push eax
push ecx
push 2
push ebx
push esi
call dword [sym.imp.KERNEL32.dll_CreateFileMappingW]
mov edi, eax
cmp edi, ebx
jne 0x47b4b2
mov ebx, 8
jmp 0x47b529
lea edx, [ebp - 4]
push edx
push esi
mov dword [ebp - 4], ebx
call dword [sym.imp.KERNEL32.dll_GetFileSize]
cmp eax, 0xffffffff
jne 0x47b4cc
or eax, eax
or ecx, 0xffffffff
jmp 0x47b4ce
xor ecx, ecx
lea edx, [ebp - 0x10]
push edx
push ecx
push eax
push edi
call fcn.00479090
add esp, 0x10
test eax, eax
je 0x47b51d
mov ebx, dword [ebp - 0x10]
mov eax, ebx
or eax, dword [ebp - 0xc]
je 0x47b51d
push edi
call dword [sym.imp.KERNEL32.dll_CloseHandle]
mov ecx, dword [ebp - 0xc]
push 0
lea edx, [ebp - 8]
push edx
push ebx
push esi
mov dword [ebp - 8], ecx
call dword [sym.imp.KERNEL32.dll_SetFilePointer]
cmp eax, 0xffffffff
jne 0x47b512
mov ebx, 0xc
jmp 0x47b529
push esi
call dword [sym.imp.KERNEL32.dll_SetEndOfFile]
xor ebx, ebx
jmp 0x47b529
push edi
mov ebx, 8
call dword [sym.imp.KERNEL32.dll_CloseHandle]
push esi
call dword [sym.imp.KERNEL32.dll_CloseHandle]
mov eax, dword [ebp + 8]
add eax, 0xfffffff0
lea ecx, [eax + 0xc]
or edx, 0xffffffff
lock xadd dword [ecx], edx
dec edx
test edx, edx
jg 0x47b54f
mov ecx, dword [eax]
mov edx, dword [ecx]
push eax
mov eax, dword [edx + 4]
call eax
pop edi
pop esi
mov eax, ebx
pop ebx
mov esp, ebp
pop ebp
ret
Function at 0x47fc70
Capabilities:
Link many functions at runtime

Disassembly:
push esi
mov esi, dword [sym.imp.KERNEL32.dll_GetModuleHandleW]
push edi
push str.ntdll.dll
call esi
mov edi, eax
test edi, edi
je 0x47fd09
push str.GetFinalPathNameByHandleW
push str.Kernel32.dll
call esi
mov esi, dword [sym.imp.KERNEL32.dll_GetProcAddress]
push eax
call esi
push str.NtQueryObject
push edi
mov dword [0x4f487c], eax
call esi
push str.NtOpenSymbolicLinkObject
push edi
mov dword [0x4f48ac], eax
call esi
push str.NtQuerySymbolicLinkObject
push edi
mov dword [0x4f48b0], eax
call esi
push str.ZwClose
push edi
mov dword [0x4f48b4], eax
call esi
push 0x68
push 0xff
push 0x4f4bc0
mov dword [0x4f48a8], eax
call fcn.004a5560
mov esi, dword [sym.imp.KERNEL32.dll_InitializeCriticalSection]
add esp, 0xc
push 0x4f4ba8
call esi
push 0x4f4b8c
call esi
mov dword [0x4f4878], 1
pop edi
pop esi
ret
Function at 0x4843a0
Capabilities:
Encode data using xor
Hash data with crc32

Disassembly:
test ecx, ecx
jne 0x4843a7
xor eax, eax
ret
push esi
not eax
cmp edx, 8
jb 0x484484
mov esi, edx
shr esi, 3
push edi
lea esp, [esp]
movzx edi, byte [ecx]
xor edi, eax
and edi, 0xff
shr eax, 8
xor eax, dword [edi*4 + 0x4db8c0]
movzx edi, byte [ecx + 1]
xor edi, eax
and edi, 0xff
inc ecx
shr eax, 8
xor eax, dword [edi*4 + 0x4db8c0]
movzx edi, byte [ecx + 1]
xor edi, eax
and edi, 0xff
inc ecx
shr eax, 8
xor eax, dword [edi*4 + 0x4db8c0]
movzx edi, byte [ecx + 1]
xor edi, eax
inc ecx
and edi, 0xff
shr eax, 8
xor eax, dword [edi*4 + 0x4db8c0]
movzx edi, byte [ecx + 1]
xor edi, eax
inc ecx
and edi, 0xff
shr eax, 8
xor eax, dword [edi*4 + 0x4db8c0]
movzx edi, byte [ecx + 1]
xor edi, eax
inc ecx
and edi, 0xff
shr eax, 8
xor eax, dword [edi*4 + 0x4db8c0]
movzx edi, byte [ecx + 1]
inc ecx
xor edi, eax
and edi, 0xff
shr eax, 8
xor eax, dword [edi*4 + 0x4db8c0]
movzx edi, byte [ecx + 1]
inc ecx
xor edi, eax
and edi, 0xff
shr eax, 8
xor eax, dword [edi*4 + 0x4db8c0]
inc ecx
sub edx, 8
sub esi, 1
jne 0x4843c0
pop edi
test edx, edx
je 0x4844ab
jmp 0x484490
movzx esi, byte [ecx]
xor esi, eax
and esi, 0xff
shr eax, 8
xor eax, dword [esi*4 + 0x4db8c0]
inc ecx
sub edx, 1
jne 0x484490
not eax
pop esi
ret

Function at 0x4844b0
Capabilities:
Generate random numbers using the delphi lcg
Hash data with crc32

Disassembly:
mov eax, dword [edx]
movsx ecx, cl
xor ecx, eax
shr eax, 8
and ecx, 0xff
mov ecx, dword [ecx*4 + 0x4db8c0]
xor ecx, eax
movzx eax, cl
add eax, dword [edx + 4]
mov dword [edx], ecx
mov ecx, dword [edx + 8]
imul eax, eax, 0x8088405
inc eax
mov dword [edx + 4], eax
shr eax, 0x18
xor eax, ecx
and eax, 0xff
shr ecx, 8
xor ecx, dword [eax*4 + 0x4db8c0]
mov dword [edx + 8], ecx
ret
Function at 0x484640
Capabilities:
Get file size
Parse pe header
Read file on windows

Disassembly:
push ebp
mov ebp, esp
sub esp, 0x4c
push ebx
push esi
mov esi, eax
push edi
lea eax, [ebp - 0x4c]
push eax
push esi
call dword [sym.imp.KERNEL32.dll_GetFileInformationByHandle]
test eax, eax
jne 0x484666
mov eax, 0x200
pop edi
pop esi
pop ebx
mov esp, ebp
pop ebp
ret
mov eax, dword [ebp - 0x4c]
mov edx, eax
xor edi, edi
and edx, 1
je 0x48467c
mov dword [ebp - 8], 1
mov edi, dword [ebp - 8]
test al, 2
je 0x484683
or edi, 2
test al, 4
je 0x48468a
or edi, 4
mov ecx, eax
and ecx, 0x10
je 0x484694
or edi, 0x10
test al, 0x20
je 0x48469b
or edi, 0x20
test ecx, ecx
je 0x4846a7
or edi, 0x40000000
jmp 0x4846ad
or edi, 0x80000000
or edi, 0x1000000
mov dword [ebp - 8], edi
test edx, edx
jne 0x4846c3
or edi, 0x800000
mov dword [ebp - 8], edi
push 0
push esi
call dword [sym.imp.KERNEL32.dll_GetFileSize]
mov dword [ebp - 0x10], eax
cmp eax, 0x28
jbe 0x48476a
mov edi, dword [sym.imp.KERNEL32.dll_SetFilePointer]
push 0
push 0
push 0
push esi
call edi
mov ebx, dword [sym.imp.KERNEL32.dll_ReadFile]
push 0
lea ecx, [ebp - 0xc]
push ecx
push 2
lea edx, [ebp - 4]
push edx
push esi
call ebx
push 0
push 0
push 0x24
push esi
call edi
push 0
lea eax, [ebp - 0xc]
push eax
push 4
lea ecx, [ebp - 0x14]
push ecx
push esi
call ebx
mov edx, 0x54ad
cmp word [ebp - 4], dx
jne 0x484767
mov eax, dword [ebp - 0x14]
lea ecx, [eax + 0x34]
cmp dword [ebp - 0x10], ecx
jbe 0x484767
push 0
push 0
push eax
push esi
call edi
push 0
lea edx, [ebp - 0xc]
push edx
push 4
lea eax, [ebp - 0x18]
push eax
push esi
call ebx
mov eax, dword [ebp - 0x18]
cmp eax, 0x5a4d
je 0x484760
cmp eax, 0x454e
je 0x484760
cmp eax, 0x454c
je 0x484760
cmp eax, 0x4550
jne 0x484767
or dword [ebp - 8], 0x400000
mov edi, dword [ebp - 8]
mov eax, dword [ebp + 8]
test eax, eax
je 0x484773
mov dword [eax], edi
mov eax, dword [ebp + 0xc]
test eax, eax
je 0x48477f
mov ecx, dword [ebp - 0x10]
mov dword [eax], ecx
mov esi, dword [ebp + 0x10]
mov edi, dword [ebp - 0x34]
mov ebx, dword [ebp - 0x38]
test esi, esi
je 0x4847f9
mov edx, dword [ebp - 0x40]
mov eax, dword [ebp - 0x3c]
push 0
sub edx, 0xd53e8000
push 0x989680
sbb eax, 0x19db1de
push eax
push edx
call fcn.004aa3f0
mov dword [esi + 4], edx
push 0
mov ecx, ebx
sub ecx, 0xd53e8000
mov edx, edi
push 0x989680
sbb edx, 0x19db1de
push edx
push ecx
mov dword [esi], eax
call fcn.004aa3f0
mov ecx, dword [ebp - 0x44]
mov dword [esi + 8], eax
mov eax, dword [ebp - 0x48]
push 0
sub eax, 0xd53e8000
push 0x989680
sbb ecx, 0x19db1de
push ecx
push eax
mov dword [esi + 0xc], edx
call fcn.004aa3f0
mov dword [esi + 0x10], eax
mov dword [esi + 0x14], edx
mov esi, dword [ebp + 0x14]
test esi, esi
je 0x484821
push edi
push ebx
lea edx, [ebp - 8]
push edx
lea eax, [ebp - 4]
push eax
call fcn.004845e0
movzx ecx, word [ebp - 4]
movzx edx, word [ebp - 8]
shl ecx, 0x10
add esp, 0x10
or ecx, edx
mov dword [esi], ecx
pop edi
pop esi
xor eax, eax
pop ebx
mov esp, ebp
pop ebp
ret
Function at 0x4848d0
Capabilities:
Encode data using xor
Generate random numbers using the delphi lcg
Hash data with crc32
Write file on windows

Disassembly:
push ebp
mov ebp, esp
push ecx
push ebx
mov ebx, dword [ebp + 8]
push esi
mov esi, ecx
cmp byte [esi + 0x2d], 0
push edi
mov edi, dword [ebp + 0xc]
mov eax, ebx
je 0x4849bb
mov eax, dword [esi + 0x3c]
test eax, eax
je 0x484907
cmp dword [esi + 0x40], edi
jae 0x484907
push eax
call fcn.00496068
add esp, 4
mov dword [esi + 0x3c], 0
cmp dword [esi + 0x3c], 0
jne 0x48491f
lea eax, [edi + edi]
push eax
call fcn.0049605d
add esp, 4
mov dword [esi + 0x3c], eax
mov dword [esi + 0x40], edi
mov ecx, dword [esi + 0x3c]
push edi
push ebx
push ecx
call fcn.004a5010
add esp, 0xc
xor ebx, ebx
test edi, edi
jbe 0x4849b8
mov edx, dword [esi + 0x3c]
mov cl, byte [ebx + edx]
mov edi, dword [esi + 0x30]
mov byte [ebp + 8], cl
movsx ecx, cl
xor ecx, edi
and ecx, 0xff
mov ecx, dword [ecx*4 + 0x4db8c0]
mov dword [ebp - 4], ecx
mov eax, dword [esi + 0x38]
shr edi, 8
xor dword [ebp - 4], edi
mov ecx, dword [ebp - 4]
mov dword [esi + 0x30], ecx
movzx ecx, cl
add ecx, dword [esi + 0x34]
mov edx, eax
imul ecx, ecx, 0x8088405
inc ecx
mov dword [esi + 0x34], ecx
shr ecx, 0x18
xor ecx, eax
shr eax, 8
and ecx, 0xff
xor eax, dword [ecx*4 + 0x4db8c0]
and edx, 0xfffd
mov dword [esi + 0x38], eax
mov ecx, dword [esi + 0x3c]
or edx, 2
mov eax, edx
xor eax, 1
imul eax, edx
shr eax, 8
xor al, byte [ebp + 8]
inc ebx
mov byte [ebx + ecx - 1], al
cmp ebx, dword [ebp + 0xc]
jb 0x484937
mov edi, dword [ebp + 0xc]
mov eax, dword [esi + 0x3c]
mov edx, dword [esi + 0x20]
test edx, edx
je 0x4849fa
mov ecx, dword [esi + 0x24]
lea ebx, [ecx + edi]
cmp ebx, dword [esi + 0x28]
jb 0x4849df
pop edi
mov dword [esi + 0x14], 0x30000
pop esi
xor eax, eax
pop ebx
mov esp, ebp
pop ebp
ret 8
push edi
push eax
add ecx, edx
push ecx
call fcn.004a5010
add esp, 0xc
add dword [esi + 0x24], edi
mov eax, edi
pop edi
pop esi
pop ebx
mov esp, ebp
pop ebp
ret 8
mov ecx, dword [esi + 4]
test ecx, ecx
je 0x484a1c
push 0
lea edx, [ebp + 0xc]
push edx
push edi
push eax
push ecx
call dword [sym.imp.KERNEL32.dll_WriteFile]
mov eax, dword [ebp + 0xc]
pop edi
pop esi
pop ebx
mov esp, ebp
pop ebp
ret 8
pop edi
mov dword [esi + 0x14], 0x1000000
pop esi
xor eax, eax
pop ebx
mov esp, ebp
pop ebp
ret 8
Function at 0x484e70
Capabilities:
Read file on windows

Disassembly:
push ebp
mov ebp, esp
push ecx
mov ecx, dword [esi + 0x84]
push edi
test ecx, ecx
je 0x484ec3
mov eax, dword [esi + 0x8c]
mov edi, dword [esi + 0x88]
cmp eax, edi
jae 0x484f00
sub edi, eax
cmp edi, edx
jbe 0x484e97
mov edi, edx
push edi
add eax, ecx
push eax
push ebx
call fcn.004a5010
mov eax, dword [esi + 0x78]
add dword [esi + 0x8c], edi
add dword [esi + 0x74], edi
add esp, 0xc
mov edx, edi
mov ecx, ebx
call fcn.004843a0
mov dword [esi + 0x78], eax
mov eax, edi
pop edi
mov esp, ebp
pop ebp
ret
mov eax, dword [esi + 0x7c]
test eax, eax
je 0x484ef9
push 0
lea ecx, [ebp - 4]
push ecx
push edx
push ebx
push eax
call dword [sym.imp.KERNEL32.dll_ReadFile]
test eax, eax
je 0x484f00
mov edi, dword [ebp - 4]
mov eax, dword [esi + 0x78]
add dword [esi + 0x74], edi
mov edx, edi
mov ecx, ebx
call fcn.004843a0
mov dword [esi + 0x78], eax
mov eax, edi
pop edi
mov esp, ebp
pop ebp
ret
mov dword [esi + 0x14], 0x1000000
xor eax, eax
pop edi
mov esp, ebp
pop ebp
ret