Function at 0x10075cc0
Capabilities:
Encode data using xor
Get file size
Hash data with crc32
Read file on windows

Disassembly:
push ebp
mov ebp, esp
push 0xffffffffffffffff
push 0x100878e7
mov eax, dword fs:[0]
push eax
sub esp, 0x18
mov eax, dword [0x100b1008]
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 dword [ebp - 0x24], ecx
mov esi, dword [ebp + 8]
push 4
mov dword [ebp - 0x14], 0
call fcn.1007a4fa
mov dword [ebp - 0x18], eax
mov dword [ebp - 4], 0
mov dword [eax], 0
mov dword [eax], 0xffffffff
mov dword [ebp - 4], 0xffffffff
mov dword [ebp - 0x14], eax
mov dword [ebp - 4], 1
sub esp, 0xc
lea ecx, [ebp - 0x14]
push esi
call fcn.10073880
test al, al
jne 0x10075d68
mov dword [ebp - 4], 0xffffffff
mov esi, dword [ebp - 0x14]
test esi, esi
je 0x10075ee4
mov eax, dword [esi]
cmp eax, 0xffffffff
je 0x10075d60
test eax, eax
je 0x10075d60
push eax
call dword [sym.imp.KERNEL32.dll_CloseHandle]
mov dword [esi], 0
push 4
push esi
jmp 0x10075ed5
mov edi, dword [ebp - 0x14]
test edi, edi
je 0x10075eaf
mov eax, dword [edi]
cmp eax, 0xffffffff
je 0x10075eaf
lea ecx, [ebp - 0x18]
push ecx
push eax
call dword [sym.imp.KERNEL32.dll_GetFileSize]
mov esi, eax
cmp esi, 0xffffffff
jne 0x10075d9e
call dword [sym.imp.KERNEL32.dll_GetLastError]
test eax, eax
jne 0x10075eaf
mov eax, dword [ebp - 0x18]
xor ecx, ecx
add ecx, esi
adc eax, 0
or ecx, eax
je 0x10075eaf
push 0x100b38e0
push 0x1000
mov byte [ebp - 0x1d], 0
mov dword [ebp - 0x1c], 0
call fcn.1007aded
mov ebx, eax
add esp, 8
mov dword [ebp - 0x18], ebx
test ebx, ebx
jne 0x10075de2
mov dword [ebp - 4], 0xffffffff
jmp 0x10075eba
xor esi, esi
cmp dword [edi], 0xffffffff
je 0x10075e69
push 0
lea eax, [ebp - 0x1c]
mov dword [ebp - 0x1c], 0
push eax
push 0x1000
push ebx
push dword [edi]
call dword [sym.imp.KERNEL32.dll_ReadFile]
test eax, eax
je 0x10075e4c
mov eax, dword [ebp - 0x24]
cmp byte [eax], 0
jne 0x10075e48
mov edx, dword [ebp - 0x1c]
test edx, edx
je 0x10075e4c
not esi
nop dword [eax]
movzx eax, byte [ebx]
lea ebx, [ebx + 1]
xor eax, esi
mov ecx, esi
movzx eax, al
shr ecx, 8
mov esi, dword [eax*4 + 0x1009ad00]
xor esi, ecx
sub edx, 1
jne 0x10075e20
mov ebx, dword [ebp - 0x18]
not esi
mov dword [ebp - 0x1c], edx
jmp 0x10075de4
mov byte [ebp - 0x1d], 1
mov eax, dword [edi]
mov ebx, esi
cmp eax, 0xffffffff
je 0x10075e66
push eax
call dword [sym.imp.KERNEL32.dll_CloseHandle]
test eax, eax
je 0x10075e66
mov dword [edi], 0xffffffff
mov ebx, dword [ebp - 0x18]
push ebx
call fcn.1007abed
add esp, 4
mov dword [ebp - 4], 0xffffffff
xor eax, eax
cmp byte [ebp - 0x1d], al
cmovne esi, eax
mov eax, dword [edi]
cmp eax, 0xffffffff
je 0x10075e99
test eax, eax
je 0x10075e99
push eax
call dword [sym.imp.KERNEL32.dll_CloseHandle]
mov dword [edi], 0
push 4
push edi
call fcn.1007a52a
add esp, 8
mov dword [ebp - 0x14], 0
mov eax, esi
jmp 0x10075ee6
mov dword [ebp - 4], 0xffffffff
test edi, edi
je 0x10075ee4
mov eax, dword [edi]
cmp eax, 0xffffffff
je 0x10075ed2
test eax, eax
je 0x10075ed2
push eax
call dword [sym.imp.KERNEL32.dll_CloseHandle]
mov dword [edi], 0
push 4
push edi
call fcn.1007a52a
mov dword [ebp - 0x14], 0
add esp, 8
xor eax, eax
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.1007a4e9
mov esp, ebp
pop ebp
ret 4