Function at 0x499db0
Capabilities:
Clear file content
Encode data using xor
Get hostname
Get session user name
Query or enumerate registry value
Set registry value
Write file on windows

Disassembly:
sub esp, 0x2b4
push ebx
push ebp
push esi
push edi
push 0x4fd55c
mov dword [esp + 0x2c], ecx
lea esi, [ecx + 0x20]
call fcn.0049e730
add esp, 4
push eax
push esi
call fcn.00498790
add esp, 8
lea eax, [esp + 0x24]
lea ecx, [esp + 0x18]
mov dword [esp + 0x10], 0
push eax
push ecx
push 0
push 0xf003f
push 0
push 0
push 0
push 0x4fd524
xor bl, bl
call fcn.0049e730
add esp, 4
push eax
push 0x80000001
call dword [sym.imp.advapi32.dll_RegCreateKeyExA]
test eax, eax
jne 0x499f4f
mov eax, dword [esp + 0x24]
mov edi, dword [sym.imp.user32.dll_wsprintfA]
cmp eax, 2
jne 0x499ec1
lea edx, [esp + 0x14]
lea eax, [esp + 0x40]
push edx
push eax
push 0
push 0
push 0x4fd510
mov dword [esp + 0x28], 0x40
call fcn.0049e730
mov ecx, dword [esp + 0x2c]
mov ebp, dword [sym.imp.advapi32.dll_RegQueryValueExA]
add esp, 4
push eax
push ecx
call ebp
push 0x4fcbb0
lea edx, [esp + 0x84]
push 0x4fd50c
push edx
call edi
mov eax, dword [esp + 0x20]
add esp, 0xc
test eax, eax
je 0x499e96
lea eax, [esp + 0x80]
lea ecx, [esp + 0x40]
push eax
push ecx
call dword [sym.imp.kernel32.dll_lstrcmpA]
test eax, eax
jne 0x499e96
mov bl, 1
lea edx, [esp + 0x14]
lea eax, [esp + 0x10]
push edx
push eax
push 0
push 0
push 0x4fd4fc
mov dword [esp + 0x28], 4
call fcn.0049e730
mov ecx, dword [esp + 0x2c]
add esp, 4
push eax
push ecx
call ebp
push 0x4fcbb0
lea edx, [esp + 0x44]
push 0x4fd50c
push edx
call edi
add esp, 0xc
lea eax, [esp + 0x40]
push eax
call dword [sym.imp.kernel32.dll_lstrlenA]
inc eax
lea ecx, [esp + 0x40]
push eax
push ecx
push 1
push 0
push 0x4fd4e8
mov dword [esp + 0x28], eax
call fcn.0049e730
mov edx, dword [esp + 0x2c]
mov edi, dword [sym.imp.advapi32.dll_RegSetValueExA]
add esp, 4
push eax
push edx
call edi
test bl, bl
mov dword [esp + 0x14], 4
je 0x499f1c
inc dword [esp + 0x10]
jmp 0x499f24
mov dword [esp + 0x10], 0
lea eax, [esp + 0x10]
push 4
push eax
push 4
push 0
push 0x4fd4fc
call fcn.0049e730
mov ecx, dword [esp + 0x2c]
add esp, 4
push eax
push ecx
call edi
mov edx, dword [esp + 0x18]
push edx
call dword [sym.imp.advapi32.dll_RegCloseKey]
mov eax, dword [esp + 0x10]
cmp eax, 1
je 0x49a382
cmp eax, 5
ja 0x49a382
test bl, bl
je 0x499f76
cmp dword [0x5138ec], 9
jge 0x49a382
push 0x4fd4d8
call fcn.0049e730
add esp, 4
push eax
push esi
call fcn.00498790
mov eax, dword [esi]
add esp, 8
cmp eax, 0xffffffff
je 0x49a0b0
lea edi, [esi + 0x101c]
push edi
call dword [sym.imp.kernel32.dll_GetLocalTime]
mov eax, dword [esi + 0x143c]
test eax, eax
je 0x499fbe
mov ecx, dword [esi + 0x1440]
cmp ecx, eax
mov eax, 0x4fc548
ja 0x499fc3
mov eax, 0x51395c
push eax
xor eax, eax
mov ax, word [esi + 0x102a]
xor ecx, ecx
mov cx, word [esi + 0x1028]
push eax
xor edx, edx
xor eax, eax
mov dx, word [esi + 0x1026]
mov ax, word [esi + 0x1024]
push ecx
push edx
xor ecx, ecx
push eax
mov cx, word [esi + 0x1022]
xor edx, edx
mov dx, word [esi + 0x101e]
xor eax, eax
mov ax, word [edi]
push ecx
push edx
push eax
push 0x4fc4f0
lea ebp, [esi + 0x1c]
call fcn.0049e6c0
add esp, 4
push eax
push ebp
call dword [sym.imp.msvcr71.dll_sprintf]
mov edi, ebp
or ecx, 0xffffffff
xor eax, eax
add esp, 0x28
repne scasb al, byte es:[edi]
mov eax, dword [esi + 0x1438]
not ecx
dec ecx
test eax, eax
mov edi, ecx
je 0x49a068
test edi, edi
jle 0x49a07a
mov ecx, 0xffffffe4
mov eax, ebp
sub ecx, esi
mov edx, dword [esi + 0x1438]
add edx, 2
mov dword [esi + 0x1438], edx
mov bl, byte [eax]
add dl, 0x43
xor bl, dl
mov byte [eax], bl
inc eax
lea edx, [ecx + eax]
cmp edx, edi
jl 0x49a046
jmp 0x49a07a
push ebp
push ebp
lea eax, [esi + 0x1030]
push edi
push eax
call fcn.0049e070
add esp, 0x10
cmp dword [esi + 0x143c], 0x3e7
je 0x49a098
mov edx, dword [esi]
lea ecx, [esp + 0x20]
push 0
push ecx
push edi
push ebp
push edx
call dword [sym.imp.kernel32.dll_WriteFile]
mov eax, dword [esi]
push eax
call dword [sym.imp.kernel32.dll_SetEndOfFile]
mov ecx, dword [esi]
push ecx
call dword [sym.imp.kernel32.dll_CloseHandle]
mov dword [esi], 0xffffffff
mov ecx, 0x5136d8
call fcn.0049c510
test eax, eax
jne 0x49a0de
push 0x4fd4c8
call fcn.0049e730
add esp, 4
mov ecx, 0x5136d8
push eax
call fcn.0049c300
test eax, eax
je 0x49a382
push 0x4fd4b4
call fcn.0049e730
add esp, 4
mov ecx, 0x5136d8
push eax
call fcn.0049c510
push eax
call fcn.0049b180
push 0x4fd49c
mov esi, eax
call fcn.0049e730
add esp, 4
mov ecx, 0x5136d8
push eax
call fcn.0049c510
push eax
call fcn.0049b180
push 0x4fd484
mov edi, eax
call fcn.0049e730
add esp, 4
mov ecx, 0x5136d8
push eax
call fcn.0049c510
push eax
call fcn.0049b180
push 0x4fd474
mov ebp, eax
call fcn.0049e730
add esp, 4
mov ecx, 0x5136d8
push eax
call fcn.0049c510
push eax
call fcn.0049b180
test esi, esi
mov dword [esp + 0x20], eax
je 0x49a382
test edi, edi
je 0x49a382
test ebp, ebp
je 0x49a382
test eax, eax
je 0x49a382
push 0
push 0
push 0
push 0
push 0x4fd468
call fcn.0049e6c0
add esp, 4
push eax
call esi
mov ebx, eax
test ebx, ebx
je 0x49a382
push 0
push 0x8000000
push 1
push 0x4fd434
call fcn.0049e730
add esp, 4
push eax
push 0x4fd428
call fcn.0049e6c0
add esp, 4
push eax
push 0x17ac
push 0x4fd418
call fcn.0049e6c0
add esp, 4
push eax
push ebx
call edi
mov esi, eax
test esi, esi
jne 0x49a1f1
push ebx
call ebp
pop edi
pop esi
pop ebp
pop ebx
add esp, 0x2b4
ret
lea edx, [esp + 0x1c]
lea eax, [esp + 0x140]
mov edi, 0x80
push edx
push eax
mov byte [esp + 0x148], 0
mov dword [esp + 0x24], edi
call dword [sym.imp.kernel32.dll_GetComputerNameA]
lea ecx, [esp + 0x1c]
lea edx, [esp + 0xc0]
push ecx
push edx
mov byte [esp + 0xc8], 0
mov dword [esp + 0x24], edi
call dword [sym.imp.advapi32.dll_GetUserNameA]
lea eax, [esp + 0x2c]
push eax
call dword [sym.imp.kernel32.dll_GetLocalTime]
mov eax, dword [0x5138ec]
cmp eax, 1
jne 0x49a250
push 0x4fd40c
jmp 0x49a2b5
cmp eax, 2
jne 0x49a25c
push 0x4fd400
jmp 0x49a2b5
cmp eax, 3
jne 0x49a268
push 0x4fd3f8
jmp 0x49a2b5
cmp eax, 4
jne 0x49a274
push 0x4fd3ec
jmp 0x49a2b5
cmp eax, 5
jne 0x49a280
push 0x4fd3e0
jmp 0x49a2b5
cmp eax, 6
jne 0x49a28c
push 0x4fd3d0
jmp 0x49a2b5
cmp eax, 7
jne 0x49a298
push 0x4fd3c4
jmp 0x49a2b5
cmp eax, 8
jne 0x49a2a4
push 0x4fd3b8
jmp 0x49a2b5
cmp eax, 9
jne 0x49a2b0
push 0x4fd3ac
jmp 0x49a2b5
push 0x4fd3a4
call fcn.0049e6c0
mov ecx, dword [esp + 0x3e]
mov edx, dword [esp + 0x3c]
add esp, 4
and ecx, 0xffff
and edx, 0xffff
push ecx
mov ecx, dword [esp + 0x3a]
and ecx, 0xffff
push edx
mov edx, dword [esp + 0x3c]
push ecx
mov ecx, dword [esp + 0x3e]
and edx, 0xffff
and ecx, 0xffff
push edx
mov edx, dword [esp + 0x3e]
push ecx
mov ecx, dword [esp + 0x40]
and edx, 0xffff
and ecx, 0xffff
push edx
push ecx
mov ecx, dword [esp + 0x44]
lea edx, [ecx + 0x1630]
add ecx, 0x1608
push edx
lea edx, [esp + 0xe0]
push edx
lea edx, [esp + 0x164]
push edx
mov edx, dword [0x513924]
mov edx, dword [edx + 0x10]
push edx
push eax
push 0x2f
push ecx
push 0x4fd348
call fcn.0049e730
add esp, 4
push eax
lea eax, [esp + 0x1fc]
push 0x104
push eax
call dword [sym.imp.msvcr71.dll__snprintf]
add esp, 0x44
lea ecx, [esp + 0x1c0]
push 0
push 0x4000002
push ecx
push 0x5135cc
push esi
call dword [esp + 0x34]
call dword [sym.imp.kernel32.dll_GetLastError]
push ebx
call ebp
push esi
call ebp
pop edi
pop esi
pop ebp
pop ebx
add esp, 0x2b4
ret