Function at 0x4d8100
Capabilities:
Encode data using xor
Encrypt data using twofish

Disassembly:
push ebp
mov ebp, esp
add esp, 0xfffffdf0
push ebx
push esi
push edi
mov ebx, 0x533ab0
mov eax, dword [ebp + 8]
mov ecx, dword [eax - 0xc]
lea edx, [ebx + 0x100]
lea eax, [ebp - 0x210]
call fcn.004d7dec
mov eax, pe_nt_image_headers32
lea edx, [ebp - 0x210]
lea esi, [ebp - 0x110]
xor ecx, ecx
mov cl, byte [edx]
mov cl, byte [ebx + ecx + 0x100]
mov byte [esi], cl
inc esi
inc edx
dec eax
jne 0x4d8139
mov eax, dword [ebp + 8]
mov ecx, dword [eax - 0x10]
lea edx, [ebp - 0x110]
lea eax, [ebp - 0x110]
call fcn.004d7dec
mov eax, dword [ebp + 8]
xor edx, edx
mov dl, byte [eax - 0x18]
mov eax, dword [ebp + 8]
xor ecx, ecx
mov cl, byte [eax - 0x14]
xor eax, eax
lea esi, [ebp - 0x110]
mov dword [ebp - 4], esi
mov esi, dword [ebp - 4]
movzx esi, byte [esi]
movzx esi, byte [ebx + esi]
xor esi, ecx
movzx esi, byte [ebx + esi]
xor esi, edx
mov esi, dword [esi*4 + 0x533cb0]
mov edi, dword [ebp + 8]
mov edi, dword [edi - 0x20]
mov dword [edi + eax*4], esi
inc eax
inc dword [ebp - 4]
cmp eax, 0x100
jne 0x4d817d
mov eax, dword [ebp + 8]
mov ecx, dword [eax - 0xc]
shr ecx, 8
mov edx, ebx
lea eax, [ebp - 0x210]
call fcn.004d7dec
mov eax, pe_nt_image_headers32
lea edx, [ebp - 0x210]
lea esi, [ebp - 0x110]
xor ecx, ecx
mov cl, byte [edx]
mov cl, byte [ebx + ecx + 0x100]
mov byte [esi], cl
inc esi
inc edx
dec eax
jne 0x4d81d1
mov eax, dword [ebp + 8]
mov ecx, dword [eax - 0x10]
shr ecx, 8
lea edx, [ebp - 0x110]
lea eax, [ebp - 0x110]
call fcn.004d7dec
mov eax, dword [ebp + 8]
xor edx, edx
mov dl, byte [eax - 0x17]
mov eax, dword [ebp + 8]
xor ecx, ecx
mov cl, byte [eax - 0x13]
xor eax, eax
lea esi, [ebp - 0x110]
mov dword [ebp - 8], esi
mov esi, dword [ebp - 8]
movzx esi, byte [esi]
movzx esi, byte [ebx + esi + 0x100]
xor esi, ecx
movzx esi, byte [ebx + esi]
xor esi, edx
mov esi, dword [esi*4 + 0x5340b0]
mov edi, dword [ebp + 8]
mov edi, dword [edi - 0x20]
mov dword [edi + eax*4 + 0x400], esi
inc eax
inc dword [ebp - 8]
cmp eax, 0x100
jne 0x4d8218
mov eax, dword [ebp + 8]
mov ecx, dword [eax - 0xc]
shr ecx, 0x10
mov edx, ebx
lea eax, [ebp - 0x210]
call fcn.004d7dec
mov eax, pe_nt_image_headers32
lea edx, [ebp - 0x210]
lea esi, [ebp - 0x110]
xor ecx, ecx
mov cl, byte [edx]
mov cl, byte [ebx + ecx]
mov byte [esi], cl
inc esi
inc edx
dec eax
jne 0x4d8274
mov eax, dword [ebp + 8]
mov ecx, dword [eax - 0x10]
shr ecx, 0x10
lea edx, [ebp - 0x110]
lea eax, [ebp - 0x110]
call fcn.004d7dec
mov eax, dword [ebp + 8]
xor edx, edx
mov dl, byte [eax - 0x16]
mov eax, dword [ebp + 8]
xor ecx, ecx
mov cl, byte [eax - 0x12]
xor eax, eax
lea esi, [ebp - 0x110]
mov dword [ebp - 0xc], esi
mov esi, dword [ebp - 0xc]
movzx esi, byte [esi]
movzx esi, byte [ebx + esi]
xor esi, ecx
movzx esi, byte [ebx + esi + 0x100]
xor esi, edx
mov esi, dword [esi*4 + 0x5344b0]
mov edi, dword [ebp + 8]
mov edi, dword [edi - 0x20]
mov dword [edi + eax*4 + 0x800], esi
inc eax
inc dword [ebp - 0xc]
cmp eax, 0x100
jne 0x4d82b7
mov eax, dword [ebp + 8]
mov ecx, dword [eax - 0xc]
shr ecx, 0x18
lea edx, [ebx + 0x100]
lea eax, [ebp - 0x210]
call fcn.004d7dec
mov eax, pe_nt_image_headers32
lea edx, [ebp - 0x210]
lea esi, [ebp - 0x110]
xor ecx, ecx
mov cl, byte [edx]
mov cl, byte [ebx + ecx]
mov byte [esi], cl
inc esi
inc edx
dec eax
jne 0x4d8317
mov eax, dword [ebp + 8]
mov ecx, dword [eax - 0x10]
shr ecx, 0x18
lea edx, [ebp - 0x110]
lea eax, [ebp - 0x110]
call fcn.004d7dec
mov eax, dword [ebp + 8]
xor edx, edx
mov dl, byte [eax - 0x15]
mov eax, dword [ebp + 8]
xor ecx, ecx
mov cl, byte [eax - 0x11]
xor eax, eax
lea esi, [ebp - 0x110]
mov dword [ebp - 0x10], esi
mov esi, dword [ebp - 0x10]
movzx esi, byte [esi]
movzx esi, byte [ebx + esi + 0x100]
xor esi, ecx
movzx esi, byte [ebx + esi + 0x100]
xor esi, edx
mov esi, dword [esi*4 + 0x5348b0]
mov edi, dword [ebp + 8]
mov edi, dword [edi - 0x20]
mov dword [edi + eax*4 + 0xc00], esi
inc eax
inc dword [ebp - 0x10]
cmp eax, 0x100
jne 0x4d835a
pop edi
pop esi
pop ebx
mov esp, ebp
pop ebp
ret