Originally posted by Hammy
There's a company I guess you could call it, named 'aimware'. They do stuff like this for multiple games but you need a paid subscription. All free programs will get you banned within 1 day - 1 week. I would check the reviews on aimware though, seems like a trusted program but have never used it myself.
Doesn't really matter what you use. Unless you made it yourself (even then its not guaranteed) you are going to get banned.
But that's also not what he was asking. If you are worried about getting a virus then just don't cheat or make your own. Anytime you get into that sort of stuff you are opening yourself up to viruses. It's just best to not go that route.