Some of the bitcoin malware is installed as a root kit so it's not detectable by standard scanning processes. If this is the case, you're going to need to use something stronger than Malwarebytes.
Normally in cases like this, I'd recommend ComboFix from Bleeping Computer. However, this is a very powerful tool that if used improperly, can brick your machine in a heartbeat.
Try the new root kit scanner from Malwarebytes. Malwarebytes | Anti-Rootkit BETA - Free Rootkit Scanner & Remover
We'll go from there.
Oh my...
"All Beta versions are non-final products. Malwarebytes does not guarantee the absence of errors which might lead to interruption in the normal computer operations or data loss."
Thanks, Retired. I'll try the Anti-Root later tonight. But I'm scared.