How does cheat detection work?

GTA 5, how does cheat detection work?

apart from being spam reported that flags you to get banned probably automatically whether legit or not, how does the game auto detect and ban accounts? Can having the 'dinput8.dll' file in the game directory really get you banned too or is it dependent on the trainer whether is detectable or not? Anyone can help explaining this and maybe sharing a safer, undetected method? I'm all new to this so I'd like to know.

1.) Probably Memory Change Detection. So don't use cheat engine. There are maybe false addresses which trigger a report.
2.) GTA 5 is not scanning processes as i know, so this is not a method they're using. Could be a blacklist with special programms too.
3.) Checking for strange dll's loaded
4.) And yes, i think, the game directory is beeing scanned too.

Don't code programms with static addresses. Always use a Patternscan. I could be completly wrong, but these are the informations i know so far. GTA 5 is maybe hackable, but they're not dumb. Im pretty sure, they don't really "fix" Moneyhacks, so you need to buy the game again if getting banned.