Recently on MacOS 10.13.6 I have noticed high CPU usage and identified the process YaraScanService as consuming close to 90% CPU.
The Activity Monitor lists it under:
as part of the
According to this thread and another one it appears to be some kind of Apple's built-in antivirus that is doing its scanning yet there doesn't seem to be a way to disable or remove it apart from killing it from the Activity Monitor or with pkill.
Any pointers on how to control it or stop/disable it?
I would assume that if you have dozens of gigabytes of zip, tar, bzip, rar, jar archives then yarascan will unpack them all to memory or disc in order to scan them, and there is absolutely no way to whitelist or exclude them.
The MRT.app is timestamped on 10-Aug-2018 along with a bunch of other folders (apparently the date when I accepted an Apple update). Most files inside the folder are timestamped 4-Jul-2018 and 8-Jul-2018, supposedly when the app was released by Apple.