Function at 0x408a90
Capabilities:
Write file on windows

Disassembly:
push ebp
mov ebp, esp
push ecx
cmp dword [ebp + 0xc], 0
push esi
mov esi, ecx
jne 0x408aa4
mov al, 1
jmp 0x408b90
cmp dword [esi + 0xc], 1
jne 0x408ab5
push 0xfffffffffffffff5
call dword [sym.imp.KERNEL32.dll_GetStdHandle]
mov dword [esi + 4], eax
push ebx
push edi
xor edi, edi
xor bl, bl
mov dword [ebp - 4], edi
cmp dword [esi + 0xc], edi
je 0x408b06
cmp dword [ebp + 0xc], edi
jbe 0x408b27
mov ecx, dword [ebp + 0xc]
sub ecx, edi
mov eax, 0x4000
cmp ecx, eax
jae 0x408ad8
mov eax, ecx
push 0
lea ecx, [ebp - 4]
push ecx
push eax
mov eax, dword [ebp + 8]
add eax, edi
push eax
push dword [esi + 4]
call dword [sym.imp.KERNEL32.dll_WriteFile]
mov ebx, eax
dec ebx
neg ebx
sbb bl, bl
inc bl
je 0x408b27
add edi, 0x4000
cmp edi, dword [ebp + 0xc]
jb 0x408ac8
jmp 0x408b23
push edi
lea eax, [ebp - 4]
push eax
push dword [ebp + 0xc]
push dword [ebp + 8]
push dword [esi + 4]
call dword [sym.imp.KERNEL32.dll_WriteFile]
mov ebx, eax
dec ebx
neg ebx
sbb bl, bl
inc bl
test bl, bl
jne 0x408b88
cmp byte [esi + 0x14], 0
je 0x408b88
cmp dword [esi + 0xc], 0
jne 0x408b88
push 0
lea eax, [esi + 0x1e]
mov edi, 0x4335ac
push eax
mov ecx, edi
call fcn.00406336
test al, al
je 0x408b7b
mov eax, dword [ebp - 4]
cmp eax, dword [ebp + 0xc]
jae 0x408ab7
test eax, eax
jbe 0x408ab7
mov ebx, dword [esi]
push 0
mov ecx, esi
call dword [ebx + 0x10]
mov ecx, dword [ebp - 4]
xor edi, edi
sub eax, ecx
sbb edx, edi
push edx
push eax
mov ecx, esi
call dword [ebx + 0xc]
jmp 0x408ab7
lea eax, [esi + 0x1e]
push eax
push 0
mov ecx, edi
call fcn.004064f3
pop edi
mov al, bl
mov byte [esi + 8], 1
pop ebx
pop esi
leave
ret 8

Function at 0x408c87
Capabilities:
Read file on windows

Disassembly:
push ebp
mov ebp, esp
push ecx
push ebx
push esi
mov esi, ecx
cmp dword [esi + 0xc], 1
push edi
jne 0x408ca1
push 0xfffffffffffffff6
call dword [sym.imp.KERNEL32.dll_GetStdHandle]
mov dword [esi + 4], eax
push 0
lea eax, [ebp - 4]
push eax
push dword [ebp + 0xc]
push dword [ebp + 8]
push dword [esi + 4]
call dword [sym.imp.KERNEL32.dll_ReadFile]
test eax, eax
jne 0x408d12
mov ecx, esi
call fcn.00408c41
test al, al
je 0x408cdc
mov eax, 0x4e20
cmp dword [ebp + 0xc], eax
jbe 0x408cdc
push eax
push dword [ebp + 8]
mov ecx, esi
call fcn.00408c87
jmp 0x408d15
cmp dword [esi + 0xc], 1
mov ebx, dword [sym.imp.KERNEL32.dll_GetLastError]
jne 0x408cf3
call ebx
cmp eax, 0x6d
jne 0x408cf3
xor eax, eax
jmp 0x408d15
cmp dword [esi + 0xc], 0
jne 0x408d0d
mov edi, 0x8000
cmp dword [ebp + 0xc], edi
jbe 0x408d0d
call ebx
cmp eax, 0x21
jne 0x408d0d
push edi
jmp 0x408cd0
or eax, 0xffffffff
jmp 0x408d15
mov eax, dword [ebp - 4]
pop edi
pop esi
pop ebx
leave
ret 8

Function at 0x409028
Capabilities:
Check if file exists
Get file attributes

Disassembly:
push ebp
mov ebp, esp
mov eax, 0x1000
call fcn.0041aad0
push esi
mov esi, dword [sym.imp.KERNEL32.dll_GetFileAttributesW]
push edi
push dword [ebp + 8]
call esi
mov edi, eax
cmp edi, 0xffffffff
jne 0x40906c
push 0x800
lea eax, [ebp - 0x1000]
push eax
push dword [ebp + 8]
call fcn.0040a3c3
test al, al
je 0x40906c
lea eax, [ebp - 0x1000]
push eax
call esi
mov edi, eax
mov eax, edi
pop edi
pop esi
leave
ret 4