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.

>>16
Do you plan on running your code within the same address space as your application? Do you want to create a new process? If so, do you want the process to be created from scratch and without a physical copy or are you fine with a dumb "dump the executable and run it"? If not, some minor modifications to the injected code will be needed to accomodate your needs.