Function at 0x1000c5d0
Capabilities:
Encode data using xor
Get file size
Read file on windows
Write file on windows

Disassembly:
push ebp
mov ebp, esp
push 0xffffffffffffffff
push 0x10098b98
mov eax, dword fs:[0]
push eax
sub esp, 0x70
mov eax, dword [0x100bd078]
xor eax, ebp
mov dword [ebp - 0x10], eax
push ebx
push esi
push edi
push eax
lea eax, [ebp - 0xc]
mov dword fs:[0], eax
mov edi, dword [ebp + 8]
mov dword [ebp - 0x44], edi
cmp dword [edi + 0x10], 0
je 0x1000c6a8
cmp edi, 0x100c1e5c
je 0x1000c622
push 0xffffffffffffffff
push 0
push edi
mov ecx, 0x100c1e5c
call fcn.10002440
cmp dword [edi + 0x14], 0x10
jb 0x1000c62c
mov eax, dword [edi]
jmp 0x1000c62e
mov eax, edi
push 0
push 0x80
push 3
push 0
push 0
push connect
push eax
call dword [sym.imp.KERNEL32.dll_CreateFileA]
mov esi, eax
cmp esi, 0xffffffff
jne 0x1000c6af
movaps xmm0, xmmword [0x100b1d00]
xor ecx, ecx
movups xmmword [ebp - 0x7c], xmm0
mov dword [ebp - 0x4c], 0xe0e195c
movaps xmm0, xmmword [0x100b1670]
movups xmmword [ebp - 0x6c], xmm0
mov dword [ebp - 0x48], 0x760e13
movaps xmm0, xmmword [0x100b1850]
movups xmmword [ebp - 0x5c], xmm0
nop
mov al, byte [ebp - 0x7c]
xor byte [ebp + ecx - 0x7b], al
inc ecx
cmp ecx, 0x36
jb 0x1000c680
cmp dword [edi + 0x14], 0x10
mov byte [ebp - 0x45], 0
jb 0x1000c699
mov edi, dword [edi]
push 0
lea eax, [ebp - 0x7b]
push eax
push edi
push 0
call dword [sym.imp.USER32.dll_MessageBoxA]
xor al, al
jmp 0x1000c893
mov dh, 0x39
mov byte [ebp - 0x31], 0
mov al, 0x17
mov byte [ebp - 0x38], dh
mov ah, 0x54
mov byte [ebp - 0x31], 0
xor al, dh
xor ah, dh
mov cl, 0x5d
mov byte [ebp - 0x37], al
mov dl, 0x4a
mov byte [ebp - 0x33], ah
mov ch, 0x49
lea eax, [ebp - 0x37]
xor cl, dh
xor ch, dh
xor dl, dh
mov byte [ebp - 0x36], cl
mov bl, 0x4d
mov byte [ebp - 0x35], dl
xor bl, dh
mov byte [ebp - 0x32], ch
push eax
mov edx, edi
mov byte [ebp - 0x34], bl
lea ecx, [ebp - 0x2c]
call fcn.1000db40
add esp, 4
lea eax, [ebp - 0x30]
mov dword [ebp - 4], 0
push eax
push esi
mov dword [ebp - 0x30], 0
call dword [sym.imp.KERNEL32.dll_GetFileSize]
mov ebx, eax
test ebx, ebx
jne 0x1000c738
push esi
call dword [sym.imp.KERNEL32.dll_CloseHandle]
cmp dword [ebp - 0x18], 0x10
lea eax, [ebp - 0x2c]
cmovae eax, dword [ebp - 0x2c]
push eax
call fcn.10085532
add esp, 4
xor bl, bl
jmp 0x1000c87c
push ebx
call fcn.1006823e
add esp, 4
mov dword [ebp - 0x40], eax
lea ecx, [ebp - 0x14]
mov dword [ebp - 0x14], 0
push 0
push ecx
push ebx
push eax
push esi
call dword [sym.imp.KERNEL32.dll_ReadFile]
push esi
call dword [sym.imp.KERNEL32.dll_CloseHandle]
mov ecx, 0x816
xor esi, esi
mov dword [ebp - 0x3c], ecx
test ebx, ebx
je 0x1000c7a6
mov edi, dword [ebp - 0x40]
mov edx, ecx
mov eax, 0x6081
movzx ecx, byte [esi + edi]
add cx, word [ebp - 0x3c]
movzx ecx, cx
imul ecx, eax
mov eax, 0x7105
shr edx, 8
xor dl, byte [esi + edi]
mov byte [esi + edi], dl
inc esi
add cx, ax
movzx ecx, cx
mov dword [ebp - 0x3c], ecx
cmp esi, ebx
jb 0x1000c772
mov edi, dword [ebp - 0x44]
cmp dword [ebp - 0x18], 0x10
lea eax, [ebp - 0x2c]
push 0
cmovae eax, dword [ebp - 0x2c]
push 0x80
push 2
push 0
push 0
push 0x40000000
push eax
call dword [sym.imp.KERNEL32.dll_CreateFileA]
push 0
mov esi, eax
lea eax, [ebp - 0x14]
push eax
push ebx
mov ebx, dword [ebp - 0x40]
push ebx
push esi
call dword [sym.imp.KERNEL32.dll_WriteFile]
push esi
call dword [sym.imp.KERNEL32.dll_CloseHandle]
push ebx
call fcn.10068239
add esp, 4
lea eax, [ebp - 0x2c]
cmp dword [ebp - 0x18], 0x10
cmovae eax, dword [ebp - 0x2c]
push 0
push 0x80
push 3
push 0
push 0
push connect
push eax
call dword [sym.imp.KERNEL32.dll_CreateFileA]
mov esi, eax
push esi
call fcn.1000d5b0
push esi
mov bl, al
call dword [sym.imp.KERNEL32.dll_CloseHandle]
test bl, bl
jne 0x1000c868
movaps xmm0, xmmword [0x100b22e0]
xor ecx, ecx
movups xmmword [ebp - 0x64], xmm0
movaps xmm0, xmmword [0x100b12a0]
movups xmmword [ebp - 0x54], xmm0
nop
mov al, byte [ebp - 0x64]
xor byte [ebp + ecx - 0x63], al
inc ecx
cmp ecx, 0x1e
jb 0x1000c840
cmp dword [edi + 0x14], 0x10
mov byte [ebp - 0x45], 0
jb 0x1000c859
mov edi, dword [edi]
push 0
lea eax, [ebp - 0x63]
push eax
push edi
push 0
call dword [sym.imp.USER32.dll_MessageBoxA]
cmp dword [ebp - 0x18], 0x10
lea eax, [ebp - 0x2c]
cmovae eax, dword [ebp - 0x2c]
push eax
call fcn.10085532
add esp, 4
mov ecx, dword [ebp - 0x18]
cmp ecx, 0x10
jb 0x1000c891
inc ecx
push ecx
push dword [ebp - 0x2c]
lea ecx, [ebp - 0x2c]
call fcn.10002760
mov al, bl
mov ecx, dword [ebp - 0xc]
mov dword fs:[0], ecx
pop ecx
pop edi
pop esi
pop ebx
mov ecx, dword [ebp - 0x10]
xor ecx, ebp
call fcn.10067c75
mov esp, ebp
pop ebp
ret 4