Function at 0x1001a780
Capabilities:
Encode data using xor
Encrypt or decrypt via wincrypt
Get file size
Read file on windows
Write file on windows

Disassembly:
push ebp
mov ebp, esp
and esp, 0xfffffff8
sub esp, 0x54
mov eax, dword [0x100c90c0]
xor eax, esp
mov dword [esp + 0x50], eax
cmp dword [ecx + 0x18], 0x10
lea edx, [ecx + 4]
push ebx
push esi
push edi
jb 0x1001a7a2
mov edx, dword [edx]
mov ecx, edx
lea esi, [ecx + 1]
mov al, byte [ecx]
inc ecx
test al, al
jne 0x1001a7a7
sub ecx, esi
push ecx
push edx
mov ecx, 0x100cafb8
call fcn.10005f40
mov esi, dword [0x100cafc8]
mov edi, dword [0x100cafcc]
test esi, esi
je 0x1001aa89
call fcn.1001a2e0
test al, al
jne 0x1001aa89
mov ah, 0x5c
mov byte [esp + 0x11], 0
mov dl, 0x2f
mov byte [esp + 0xc], ah
xor dl, ah
mov byte [esp + 0x11], 0
mov cl, 0x38
mov byte [esp + 0xf], dl
mov al, 0x72
lea edx, [esp + 0xd]
xor cl, ah
mov bl, 0x28
xor al, ah
mov byte [esp + 0xe], cl
xor bl, ah
mov byte [esp + 0xd], al
mov byte [esp + 0x10], bl
lea ecx, [edx + 1]
mov al, byte [edx]
inc edx
test al, al
jne 0x1001a814
mov ebx, dword [0x100cafb8]
lea eax, [esp + 0xd]
sub edx, ecx
cmp edi, 0xf
push edx
mov ecx, 0x100cafb8
mov edx, esi
cmova ecx, ebx
push eax
push ecx
call fcn.1000a3f0
add esp, 0xc
cmp eax, 0xffffffff
je 0x1001aa8f
movaps xmm0, xmmword [0x100bf040]
xor ecx, ecx
push dword [0x100ce554]
movups xmmword [esp + 0x1c], xmm0
mov dword [esp + 0x2c], 0x686b6b3a
mov dword [esp + 0x30], 0x753f7e04
mov dword [esp + 0x34], 0x2f2f3c
mov al, byte [esp + 0x1c]
xor byte [esp + ecx + 0x1d], al
inc ecx
cmp ecx, 0x1a
jb 0x1001a874
sub esp, 0x18
mov byte [esp + 0x4f], 0
mov edx, esp
lea ecx, [esp + 0x35]
xorps xmm0, xmm0
lea esi, [ecx + 1]
movups xmmword [edx], xmm0
mov dword [edx + 0x10], 0
mov dword [edx + 0x14], 0
mov al, byte [ecx]
inc ecx
test al, al
jne 0x1001a8a7
sub ecx, esi
lea eax, [esp + 0x35]
push ecx
push eax
mov ecx, edx
call fcn.10002620
lea eax, [esp + 0x50]
push eax
call fcn.10005dd0
add esp, 0x20
mov ecx, 0x100ce918
push eax
call fcn.100082d0
mov ecx, dword [esp + 0x48]
cmp ecx, 0xf
jbe 0x1001a90b
mov edx, dword [esp + 0x34]
inc ecx
mov eax, edx
cmp ecx, 0x1000
jb 0x1001a901
mov edx, dword [eax - 4]
add ecx, 0x23
sub eax, edx
add eax, 0xfffffffc
cmp eax, 0x1f
ja 0x1001aab8
push ecx
push edx
call fcn.100859f6
add esp, 8
cmp dword [0x100cafcc], 0xf
mov eax, 0x100cafb8
mov esi, dword [sym.imp.KERNEL32.dll_CreateFileA]
cmova eax, dword [0x100cafb8]
push 0
push 0x80
push 3
push 0
push 3
push connect
push eax
call esi
cmp dword [0x100ce92c], 0xf
mov ecx, 0x100ce918
push 0
cmova ecx, dword [0x100ce918]
mov edi, eax
push 0x80
push 2
push 0
push 2
push 0x40000000
push ecx
mov dword [esp + 0x28], edi
call esi
mov esi, dword [sym.imp.KERNEL32.dll_CloseHandle]
mov ebx, eax
mov dword [esp + 0x14], ebx
cmp edi, 0xffffffff
je 0x1001aa6d
cmp ebx, 0xffffffff
je 0x1001aa69
lea eax, [esp + 0x50]
xor bl, bl
push eax
push edi
call dword [sym.imp.KERNEL32.dll_GetFileSizeEx]
xor esi, esi
or esi, dword [esp + 0x50]
not esi
and esi, 1
add esi, 0x1f
push esi
call fcn.10091696
mov edi, eax
add esp, 4
test edi, edi
je 0x1001aa5b
push 0
lea eax, [esp + 0x50]
push eax
push 4
push edi
push dword [esp + 0x1c]
call dword [sym.imp.KERNEL32.dll_ReadFile]
test eax, eax
je 0x1001a9e2
push 0
lea eax, [esp + 0x50]
push eax
push dword [esp + 0x54]
push edi
push dword [esp + 0x24]
call dword [sym.imp.KERNEL32.dll_WriteFile]
push esi
push 0
push edi
call fcn.10087b80
add esp, 0xc
mov dword [esp + 0x4c], 0
push 0
lea eax, [esp + 0x50]
push eax
push esi
push edi
push dword [esp + 0x1c]
call dword [sym.imp.KERNEL32.dll_ReadFile]
test eax, eax
je 0x1001aa4e
cmp dword [esp + 0x4c], esi
mov eax, 1
movzx ebx, bl
cmovb ebx, eax
lea eax, [esp + 0x4c]
push eax
push edi
push 0
push 1
push 0
push dword [0x100ce558]
call dword [sym.imp.ADVAPI32.dll_CryptDecrypt]
test eax, eax
je 0x1001aa4e
push 0
lea eax, [esp + 0x50]
push eax
push dword [esp + 0x54]
push edi
push dword [esp + 0x24]
call dword [sym.imp.KERNEL32.dll_WriteFile]
test bl, bl
je 0x1001a9f6
push edi
call fcn.1009118e
add esp, 4
mov esi, dword [sym.imp.KERNEL32.dll_CloseHandle]
mov edi, dword [esp + 0xc]
mov ebx, dword [esp + 0x14]
test edi, edi
je 0x1001aa70
push edi
call esi
test ebx, ebx
je 0x1001aaa6
push ebx
call esi
pop edi
pop esi
pop ebx
mov ecx, dword [esp + 0x50]
xor ecx, esp
call fcn.10085995
mov esp, ebp
pop ebp
ret
mov ebx, dword [0x100cafb8]
cmp edi, 0xf
mov eax, 0x100cafb8
push esi
cmova eax, ebx
mov ecx, 0x100ce918
push eax
call fcn.10005f40
mov ecx, dword [esp + 0x5c]
pop edi
pop esi
pop ebx
xor ecx, esp
call fcn.10085995
mov esp, ebp
pop ebp
ret
call fcn.1008ac0f
int3