Function at 0x413b57
Capabilities:
Encode data using xor
Read file on windows

Disassembly:
mov eax, 0x4780f8
call fcn.0044f588
sub esp, 0x40
push ebx
push esi
push edi
mov dword [ebp - 0x10], esp
mov esi, ecx
push 0xffffffffffffffff
push dword [esi]
mov dword [ebp - 0x28], esi
mov byte [ebp - 0x11], 0
call dword [sym.imp.KERNEL32.dll_WaitForSingleObject]
mov ecx, dword [ebp + 0x14]
call fcn.004014a0
lea eax, [ebp - 0x4c]
xor edi, edi
push eax
mov ecx, esi
mov dword [ebp - 0x24], edi
call fcn.00412de5
cmp eax, 0xffffffff
mov dword [ebp - 0x1c], eax
je 0x413d35
push edi
push edi
push dword [ebp - 0x44]
push eax
call dword [sym.imp.KERNEL32.dll_SetFilePointer]
mov ebx, dword [ebp - 0x44]
cmp eax, ebx
jne 0x413d15
mov byte [ebp - 0x12], 1
mov eax, dword [ebp - 0x24]
cmp eax, dword [ebp + 8]
jae 0x413d0b
xor edi, edi
push edi
lea eax, [ebp - 0x20]
push eax
push 4
lea eax, [ebp - 0x18]
push eax
push dword [ebp - 0x1c]
mov dword [ebp - 0x18], edi
mov byte [ebp - 0x12], 1
call dword [sym.imp.KERNEL32.dll_ReadFile]
test eax, eax
je 0x413d15
cmp dword [ebp - 0x20], edi
je 0x413d11
cmp dword [ebp - 0x20], 4
jne 0x413d15
cmp dword [ebp - 0x18], 0xf4240
ja 0x413d15
mov dword [ebp - 0x34], edi
mov dword [ebp - 0x30], edi
mov dword [ebp - 0x2c], edi
push edi
push dword [ebp - 0x18]
mov dword [ebp - 4], edi
lea ecx, [ebp - 0x38]
mov byte [ebp - 4], 1
call fcn.00413afa
mov esi, dword [ebp - 0x34]
cmp esi, edi
mov dword [ebp - 4], edi
jne 0x413c37
xor eax, eax
jmp 0x413c3c
mov eax, dword [ebp - 0x30]
sub eax, esi
mov ecx, dword [ebp - 0x18]
cmp eax, ecx
jne 0x413ceb
cmp ecx, 4
jb 0x413ceb
push 0
lea eax, [ebp - 0x20]
push eax
mov dword [esi], ecx
mov eax, dword [ebp - 0x18]
add eax, 0xfffffffc
push eax
lea edi, [esi + 4]
push edi
push dword [ebp - 0x1c]
call dword [sym.imp.KERNEL32.dll_ReadFile]
test eax, eax
je 0x413ceb
mov ecx, dword [ebp - 0x18]
lea eax, [ecx - 4]
cmp dword [ebp - 0x20], eax
jne 0x413ceb
mov eax, dword [edi]
cmp eax, ecx
ja 0x413ceb
jae 0x413c8f
mov cl, byte [esi + 0x10]
xor byte [esi + eax], cl
inc eax
cmp eax, dword [ebp - 0x18]
jb 0x413c83
test esi, esi
jne 0x413c97
xor eax, eax
jmp 0x413c9c
mov eax, dword [ebp - 0x30]
sub eax, esi
lea eax, [eax + esi - 1]
cmp byte [eax], 0
jne 0x413cff
mov eax, dword [esi + 4]
mov edx, dword [esi]
lea ecx, [esi + eax]
sub edx, eax
call fcn.00412b7b
cmp eax, dword [esi + 8]
jne 0x413cff
mov eax, dword [esi + 4]
mov ecx, dword [ebp + 0x14]
inc dword [ebp - 0x24]
add eax, esi
push eax
mov byte [ebp - 0x12], 0
call fcn.00402160
mov eax, dword [ebp + 0x10]
add ebx, dword [ebp - 0x18]
test eax, eax
je 0x413cda
mov dword [eax], ebx
or dword [ebp - 4], 0xffffffff
lea ecx, [ebp - 0x38]
call fcn.00413075
jmp 0x413bbc
or dword [ebp - 4], 0xffffffff
lea ecx, [ebp - 0x38]
call fcn.00413075
jmp 0x413d15
or dword [ebp - 4], 0xffffffff
lea ecx, [ebp - 0x38]
call fcn.00413075
cmp byte [ebp - 0x12], 0
jne 0x413d15
mov byte [ebp - 0x11], 1
cmp dword [ebp - 0x1c], 0xffffffff
je 0x413d35
cmp byte [ebp - 0x11], 0
jne 0x413d2c
mov ecx, dword [ebp - 0x1c]
lea edx, [ebp - 0x4c]
call fcn.00412da0
push dword [ebp - 0x1c]
call dword [sym.imp.KERNEL32.dll_CloseHandle]
mov eax, dword [ebp - 0x28]
push dword [eax]
call dword [sym.imp.KERNEL32.dll_ReleaseMutex]
cmp byte [ebp - 0x11], 0
jne 0x413d4e
mov ecx, dword [ebp + 0x14]
call fcn.004014a0
mov eax, dword [ebp + 0xc]
test eax, eax
je 0x413d61
mov cl, byte [ebp - 0x11]
neg cl
sbb ecx, ecx
and ecx, dword [ebp - 0x24]
mov dword [eax], ecx
mov ecx, dword [ebp - 0xc]
mov al, byte [ebp - 0x11]
pop edi
pop esi
mov dword fs:[0], ecx
pop ebx
leave
ret 0x10