Function at 0x410bc0
Capabilities:
Get file size
Read file on windows
Write file on windows

Disassembly:
push ebp
mov ebp, esp
add esp, 0xffffff50
push ebx
push esi
xor ecx, ecx
mov dword [ebp - 0xb0], ecx
mov dword [ebp - 0xa8], ecx
mov dword [ebp - 0xac], ecx
mov dword [ebp - 0xa0], ecx
mov dword [ebp - 0xa4], ecx
mov dword [ebp - 0x14], ecx
mov dword [ebp - 8], edx
mov dword [ebp - 4], eax
mov eax, dword [ebp - 4]
call fcn.00403a94
mov eax, dword [ebp - 8]
call fcn.00403a94
xor eax, eax
push ebp
push 0x410eb6
push dword fs:[eax]
mov dword fs:[eax], esp
mov eax, 0x416b14
mov edx, 0x410ed0
call fcn.00403780
xor ebx, ebx
mov eax, dword [ebp - 4]
call fcn.004038a4
test eax, eax
je 0x410e7d
mov eax, dword [ebp - 8]
call fcn.004038a4
test eax, eax
je 0x410e7d
push 0
lea eax, [ebp - 0x9c]
push eax
mov eax, dword [ebp - 4]
call fcn.00403aa4
push eax
call sub.kernel32.dll_OpenFile
mov esi, eax
cmp esi, 0xffffffff
jne 0x410ca1
push 0x410f50
push dword [ebp - 4]
push 0x410f60
lea edx, [ebp - 0xa4]
xor eax, eax
call fcn.00406684
push dword [ebp - 0xa4]
lea eax, [ebp - 0xa0]
mov edx, 4
call fcn.00403964
mov eax, dword [ebp - 0xa0]
call fcn.00413eb4
jmp 0x410e7d
push 0
push esi
call sub.kernel32.dll_GetFileSize_1
add eax, 5
mov dword [ebp - 0xc], eax
mov eax, dword [ebp - 0xc]
push eax
lea eax, [ebp - 0x14]
mov ecx, 1
mov edx, dword [0x410ba0]
call fcn.00404230
add esp, 4
mov edx, 0x415238
mov eax, dword [ebp - 0x14]
mov ecx, 5
call fcn.0040494c
push 0
lea eax, [ebp - 0x10]
push eax
mov eax, dword [ebp - 0xc]
sub eax, 5
push eax
mov eax, dword [ebp - 0x14]
add eax, 5
push eax
push esi
call sub.kernel32.dll_ReadFile_1
test eax, eax
jne 0x410d39
push 0x410f6c
push dword [ebp - 4]
push 0x410f60
lea edx, [ebp - 0xac]
xor eax, eax
call fcn.00406684
push dword [ebp - 0xac]
lea eax, [ebp - 0xa8]
mov edx, 4
call fcn.00403964
mov eax, dword [ebp - 0xa8]
call fcn.00413eb4
jmp 0x410e7d
push esi
call sub.kernel32.dll_CloseHandle_1
cmp dword [ebp - 0xc], 0xa
jbe 0x410dbb
mov eax, dword [ebp - 0x14]
mov al, byte [eax + 5]
cmp al, byte [0x415238]
jne 0x410dbb
mov eax, dword [ebp - 0x14]
mov al, byte [eax + 6]
cmp al, byte [0x415239]
jne 0x410dbb
mov eax, dword [ebp - 0x14]
mov al, byte [eax + 7]
cmp al, byte [0x41523a]
jne 0x410dbb
mov eax, dword [ebp - 0x14]
mov al, byte [eax + 8]
cmp al, byte [0x41523b]
jne 0x410dbb
mov eax, dword [ebp - 0x14]
mov al, byte [eax + 9]
cmp al, byte [0x41523c]
jne 0x410dbb
push 0x410f80
push dword [ebp - 4]
push 0x410f90
push dword [ebp - 8]
lea eax, [ebp - 0xb0]
mov edx, 4
call fcn.00403964
mov eax, dword [ebp - 0xb0]
call fcn.00413eb4
jmp 0x410e7d
mov eax, 0x416b14
mov edx, 0x410fa0
call fcn.00403780
mov edx, dword [ebp - 0xc]
dec edx
sub edx, 5
jb 0x410e10
inc edx
mov dword [ebp - 0x10], 5
mov eax, dword [ebp - 0x14]
mov ecx, dword [ebp - 0x10]
xor byte [eax + ecx], 0xc2
mov eax, dword [ebp - 0x14]
mov ecx, dword [ebp - 0x10]
movzx eax, byte [eax + ecx]
add ax, 0x79
cmp ax, 0xff
jle 0x410dfe
sub ax, 0xff
dec eax
mov ecx, dword [ebp - 0x14]
mov esi, dword [ebp - 0x10]
add ecx, esi
push ecx
pop ecx
mov byte [ecx], al
inc dword [ebp - 0x10]
dec edx
jne 0x410ddb
mov eax, dword [ebp - 8]
call fcn.004038a4
test eax, eax
jne 0x410e27
lea eax, [ebp - 8]
mov edx, dword [ebp - 4]
call fcn.004037c4
push 0
push 0x80
push 2
push 0
push 0
push 0x40000000
mov eax, dword [ebp - 8]
call fcn.00403aa4
push eax
call sub.kernel32.dll_CreateFileA_1
mov esi, eax
cmp esi, 0xffffffff
je 0x410e7d
push 0
lea eax, [ebp - 0x10]
push eax
mov eax, dword [ebp - 0xc]
push eax
mov eax, dword [ebp - 0x14]
push eax
push esi
call sub.kernel32.dll_WriteFile_1
test eax, eax
je 0x410e68
mov bl, 1
push esi
call sub.kernel32.dll_CloseHandle_1
mov eax, 0x416b14
mov edx, 0x411030
call fcn.00403780
xor eax, eax
pop edx
pop ecx
pop ecx
mov dword fs:[eax], edx
push 0x410ebd
lea eax, [ebp - 0xb0]
mov edx, 5
call fcn.00403750
lea eax, [ebp - 0x14]
mov edx, dword [0x410ba0]
call fcn.0040423c
lea eax, [ebp - 8]
mov edx, 2
call fcn.00403750
ret