Hey,
I recently let a friend of mine borrow my computer for a couple of weeks to produce some music and have noticed some malware has potentially been installed. Initially Malwarebytes cleared up a cryptojacking miner and quarantined it. However, upon scanning Avast and doing a deep scan I appear to have another file which is entitled MacOS:Miner-AA (Trj) by Avast installed into /usr/local/bin/main.data which cannot be removed using avast and isn't recognised by Malwarebytes at all. I haven't noticed any particularly high CPU readings on activity monitor either but seeing as permissions seem to have been set up to stop me accessing the file I'm concerned it is blocking antivirus and causing issues.
Any advice on how to remove this would be great, many thanks.