Mhhhh, never thougt about this till now. Maybe you're right. But it should not be a problem to search for malware in the code. You can use arrays with thousands of words and can search for some things in it which takes only a little piece of time. We need a solution fast, to get these cheaters out of range and till Bohemia is not fixing their Anti-Cheat in cooperation with Battleye this seems to be the best way isn't it?
Maybe you have other suggestions.

Still not solved :(.