Trojan project

Greetings /prog/, I'm from a neighboring board.

I'm on the last phases of a trojan project. I'm having a hard time finding the best way of hiding my malicious executable within another executable. I assume the best way of doing that would involve assembly? "Code caves" seem to be what I'm looking for, though there doesn't seem to be much tutorials for it. Any advice? Thanks in advance.

>>14
Are you trying to hide it from a skilled reverse engineer?

That will be an exercise for another time. For now I'm just trying to inject my code into a carrier in such a way that allows both the carrier's code and my injected code to be executed.

The executable I'm injecting it into does not have any type of integrity check as far as I know.