I've run into a relentless little piece of malware called AdAntiHS which I have not been able to get rid of in a friend's computer. There's barely any information on it from credible sources online. It digs its claws into the startup programs on Windows (running Windows 7) and won't let go. Not sure what kind of damage it's doing either.
I've disabled it from startup using msconfig, manually deleted it, and even ran MalwareBytes from a USB using Hiren's BootCD and removed it. But after restarting the computer it shows back up at C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Startup. I've also deleted keys in the registry associated with AdAntiHS but to no avail upon restarting the computer.
I noticed that upon deleting AdAntiHS from startup, a commonstartup file is created at C:\Windows\pss. I deleted that too. There is a registry key of appcompatCache which I understand is more like a reference or history of programs that have executed on the computer. Those are the only registry keys I have not deleted that make mention of AdAntiHS.
So far, I installed BitDefender on the computer which manages to catch AdAntiHS everytime on startup, but even though I choose to delete the quarantined item, it comes back again on restart. So at best, I quarantine it on startup but I want to be able to permanently get rid of it.
Has anyone else encountered this piece of malware and been able to wipe it from their system?
Thanks in advance for your help.