Just in case you were wondering, i would not connect a computer to the internet at all without first having malware bytes anti malware and Avast free version installed, and the very first thing i would do when i connected to the internet after installing these two programs is update to the latest versions of both, i call them internet condoms as you'll never know what you will catch going online without them or something as good.
I am only windows PC tech mate, I have never ever in NY life touched a Mac before
Install Avast like I said earlier and run a Boot Time Scan, can't help you further mate as this is the solution
I did it but it did not remove it.