Function at 0x4d7d72
Capabilities:
Encode data using xor

Disassembly:
push ebx
mov ebx, dword [esp + 8]
push ebp
mov ebp, dword [esp + 0x18]
push esi
cmp dword [ebx + 0xe8], 0
mov esi, dword [esp + 0x18]
push edi
je 0x4d7d96
mov eax, dword [ebx + 0x84]
sub eax, esi
dec eax
jmp 0x4d7d98
mov eax, esi
mov edi, dword [ebx + 0xcc]
mov edx, dword [ebx + 0xd4]
mov ecx, dword [esp + 0x18]
imul edi, eax
mov eax, edx
imul eax, ecx
add edi, eax
add edi, dword [ebx + 0xc8]
cmp dword [ebx + 0xe0], 0
jne 0x4d81c5
cmp dword [ebx + 0xe4], 0
jne 0x4d81c5
mov eax, dword [ebx + 0xd8]
test al, 2
je 0x4d7e0e
test ebp, ebp
je 0x4d81e9
mov al, byte [ebx + 0xf0]
xor byte [edi + 2], al
mov al, byte [ebx + 0xf4]
xor byte [edi + 1], al
mov al, byte [ebx + 0xf8]
xor byte [edi], al
add edi, dword [ebx + 0xd4]
sub ebp, 1
jne 0x4d7de4
jmp 0x4d81e9
test eax, 0x100
je 0x4d7e4d
test ebp, ebp
je 0x4d81e9
mov al, byte [ebx + 0xf0]
mov byte [edi + 2], al
mov al, byte [ebx + 0xf4]
mov byte [edi + 1], al
mov al, byte [ebx + 0xf8]
mov byte [edi], al
lea edi, [edi + 4]
mov al, byte [ebx + 0xfc]
mov byte [edi - 1], al
sub ebp, 1
jne 0x4d7e1d
jmp 0x4d81e9
test al, 8
je 0x4d7e7a
cmp edx, 4
jne 0x4d81e9
test ebp, ebp
je 0x4d81e9
add edi, 3
mov al, byte [ebx + 0xfc]
mov byte [edi], al
lea edi, [edi + 4]
sub ebp, 1
jne 0x4d7e65
jmp 0x4d81e9
test al, 0x10
je 0x4d801d
test ebp, ebp
je 0x4d81e9
cmp edx, 4
jne 0x4d7fc8
movzx edx, byte [edi + 3]
lea ecx, [edi + 2]
mov esi, dword [ebx + 0xfc]
mov dword [esp + 0x18], edx
test esi, esi
jne 0x4d7ead
movzx eax, byte [ecx]
jmp 0x4d7ef2
mov dword [esp + 0x14], ecx
test edx, edx
jne 0x4d7ebd
mov eax, dword [ebx + 0xf0]
jmp 0x4d7eeb
movzx eax, byte [ecx]
mov esi, dword [ebx + 0x100]
imul ecx, dword [ebx + 0xf0], 0xff
imul eax, esi
imul esi, edx
imul eax, edx
add eax, ecx
imul ecx, dword [ebx + 0xfc], 0xff
add esi, ecx
mov ecx, dword [esp + 0x14]
cdq
idiv esi
mov edx, dword [esp + 0x18]
mov byte [ecx], al
mov ecx, dword [ebx + 0xfc]
test ecx, ecx
jne 0x4d7f04
movzx eax, byte [edi + 1]
jmp 0x4d7f41
test edx, edx
jne 0x4d7f13
mov eax, dword [ebx + 0xf4]
cdq
idiv ecx
jmp 0x4d7f41
mov esi, dword [ebx + 0x100]
movzx eax, byte [edi + 1]
imul ecx, dword [ebx + 0xf4], 0xff
imul eax, esi
imul esi, edx
imul eax, edx
add eax, ecx
imul ecx, dword [ebx + 0xfc], 0xff
cdq
add esi, ecx
idiv esi
mov byte [edi + 1], al
mov ecx, dword [ebx + 0xfc]
test ecx, ecx
jne 0x4d7f53
movzx eax, byte [edi]
jmp 0x4d7f93
mov edx, dword [esp + 0x18]
test edx, edx
jne 0x4d7f66
mov eax, dword [ebx + 0xf8]
cdq
idiv ecx
jmp 0x4d7f93
mov esi, dword [ebx + 0x100]
movzx eax, byte [edi]
imul ecx, dword [ebx + 0xf8], 0xff
imul eax, esi
imul esi, edx
imul eax, edx
add eax, ecx
imul ecx, dword [ebx + 0xfc], 0xff
cdq
add esi, ecx
idiv esi
mov byte [edi], al
mov eax, dword [ebx + 0x100]
imul eax, dword [esp + 0x18]
imul ecx, dword [ebx + 0xfc], 0xff
add eax, ecx
mov ecx, 0xff
cdq
idiv ecx
mov byte [edi + 3], al
add edi, 4
sub ebp, 1
jne 0x4d7e93
jmp 0x4d81e9
mov ecx, 0xff
movzx eax, byte [edi + 2]
imul eax, dword [ebx + 0x100]
add eax, dword [ebx + 0xf0]
cdq
idiv ecx
mov byte [edi + 2], al
movzx eax, byte [edi + 1]
imul eax, dword [ebx + 0x100]
add eax, dword [ebx + 0xf4]
cdq
idiv ecx
mov byte [edi + 1], al
movzx eax, byte [edi]
imul eax, dword [ebx + 0x100]
add eax, dword [ebx + 0xf8]
cdq
idiv ecx
mov byte [edi], al
lea edi, [edi + 3]
sub ebp, 1
jne 0x4d7fcd
jmp 0x4d81e9
and eax, 0x20
test ebp, ebp
je 0x4d81e9
test eax, eax
je 0x4d819e
cmp edx, 4
jne 0x4d814c
movzx edx, byte [edi + 3]
lea ecx, [edi + 2]
mov esi, dword [ebx + 0xfc]
mov dword [esp + 0x18], edx
test esi, esi
jne 0x4d8053
movzx eax, byte [ecx]
jmp 0x4d8098
mov dword [esp + 0x14], ecx
test edx, edx
jne 0x4d8063
mov eax, dword [ebx + 0xf0]
jmp 0x4d8091
movzx eax, byte [ecx]
mov esi, dword [ebx + 0x100]
imul ecx, dword [ebx + 0xf0], 0xff
imul eax, esi
imul esi, edx
imul eax, edx
add eax, ecx
imul ecx, dword [ebx + 0xfc], 0xff
add esi, ecx
mov ecx, dword [esp + 0x14]
cdq
idiv esi
mov edx, dword [esp + 0x18]
mov byte [ecx], al
mov ecx, dword [ebx + 0xfc]
test ecx, ecx
jne 0x4d80aa
movzx eax, byte [edi + 1]
jmp 0x4d80e7
test edx, edx
jne 0x4d80b9
mov eax, dword [ebx + 0xf4]
cdq
idiv ecx
jmp 0x4d80e7
mov esi, dword [ebx + 0x100]
movzx eax, byte [edi + 1]
imul ecx, dword [ebx + 0xf4], 0xff
imul eax, esi
imul esi, edx
imul eax, edx
add eax, ecx
imul ecx, dword [ebx + 0xfc], 0xff
cdq
add esi, ecx
idiv esi
mov byte [edi + 1], al
mov ecx, dword [ebx + 0xfc]
test ecx, ecx
jne 0x4d80f9
movzx eax, byte [edi]
jmp 0x4d8139
mov edx, dword [esp + 0x18]
test edx, edx
jne 0x4d810c
mov eax, dword [ebx + 0xf8]
cdq
idiv ecx
jmp 0x4d8139
mov esi, dword [ebx + 0x100]
movzx eax, byte [edi]
imul ecx, dword [ebx + 0xf8], 0xff
imul eax, esi
imul esi, edx
imul eax, edx
add eax, ecx
imul ecx, dword [ebx + 0xfc], 0xff
cdq
add esi, ecx
idiv esi
mov byte [edi], al
add edi, 4
sub ebp, 1
jne 0x4d8039
jmp 0x4d81e9
mov ecx, 0xff
movzx eax, byte [edi + 2]
imul eax, dword [ebx + 0x100]
add eax, dword [ebx + 0xf0]
cdq
idiv ecx
mov byte [edi + 2], al
movzx eax, byte [edi + 1]
imul eax, dword [ebx + 0x100]
add eax, dword [ebx + 0xf4]
cdq
idiv ecx
mov byte [edi + 1], al
movzx eax, byte [edi]
imul eax, dword [ebx + 0x100]
add eax, dword [ebx + 0xf8]
cdq
idiv ecx
mov byte [edi], al
lea edi, [edi + 3]
sub ebp, 1
jne 0x4d8151
jmp 0x4d81e9
mov al, byte [ebx + 0xf0]
mov byte [edi + 2], al
mov al, byte [ebx + 0xf4]
mov byte [edi + 1], al
mov al, byte [ebx + 0xf8]
mov byte [edi], al
add edi, dword [ebx + 0xd4]
sub ebp, 1
jne 0x4d819e
jmp 0x4d81e9
test ebp, ebp
je 0x4d81e9
push edi
push esi
push ecx
push ebx
call fcn.004d823a
mov ecx, dword [esp + 0x28]
add esp, 0x10
add edi, dword [ebx + 0xd4]
inc ecx
mov dword [esp + 0x18], ecx
sub ebp, 1
jne 0x4d81c9
pop edi
pop esi
pop ebp
pop ebx
ret