Tool to sort Activity Monitor: legit or suspicious
At https://objective-see.com/products.html there are (free) tools available to see security related process information (persistent processes, process hierarchy etc.)
There is a suite of security features (like GateKeeper), including malware removal tools (xProtect and – appropriately named – MRT) built into macOS.
These are updated silently and regularly in the background independent of &quot;regular&quot; macOS updates.
If you want to see more information/the current status of all these built-in tools, have a  look at the applications available at: https://eclecticlight.co/downloads/.