That sounds like a kernel panic. These are generally hardware related, often caused by poorly seated or fauly RAM.
What is a Kernel Panic?
More details here:
Useful articles on how to avoid and eliminate kernel panics here:
As Klaus indicates, that's a kernel panic, not any kind of malware. Kernel panics are generally caused by one of three things: bad third-party kernel extensions, a badly corrupt system or bad hardware.
If you can post the contents of your latest kernel panic log, we can help point you towards a solution appropriate for your particular case. See: