Extracting files from a .exe application?

Im not really a pro hacker lol But I was wondering is there programs that could extract files from a .exe application or break it down? And if not is there possibilities of a backdoor being opened in the .exe??

no u cant u would have to know wat it was coded with

Resource hacker is as close as your gonna get. That will get you icons, strings, etc. But you can't do anything with it because you would first need the Dumped Engine. and editing that then putting it in the game folder renders the game useless