All of this is equally possible on plain old BIOS. One way that's been done in the past is to write a small hook into the SMM handler. Don't even need to drop a

All of this is equally possible on plain old BIOS. One way that's been done in the past is to write a small hook into the SMM handler. Don't even need to drop any malware into windows, once you're in SMM mode you are running completely outside the view of the OS, with full access to everything in memory.