Ye I solved the issue already. It was Process hacker
Funnily enough, their FAQ section mentions anti cheats:
> Is Process Hacker compatible with anti-cheat software such as BattlEye, EAC and VAC?
> Yes
The game seems fine with rivatuner, which does trigger some shitty anti cheats because of to hooking and with ghub, the new logitech mouse / keyboard software which also causes issues in some other games.
All of this makes me believe it detected "the hacking tool" because the name of the process contains the word "hack". It could also be because of possible hooking process hacker does, but in that case it should have detected rivatuner as well.