Similar thing happened when I returned to playing Rust after a long break. I had even just upgraded my HDD specifically to get Rust to load faster. Maybe 2 days after upgrading my HDD I get a VAC ban on it(my only VAC ban) for no apparent reason from their third party anti cheat software Easy Anti-Cheat (EAC). I tried to appeal to EAC but they won't give any info. I think what could have set it off was either 1) the hard drive upgrade 2) maybe my anti-virus since it once tried to sandbox it and run it virtualized or 3) EAC scanned my hard drive and found that I have unrelated source code/python scripts on it since I'm a dev.

w/e I'm done with it but I don't like having a VAC ban on my account for no reason :/