There was an ars article (http://arstechnica.com/security/2013/10/meet-badbios-the-mysterious-mac-and-pc-malware-that-jumps-airgaps/ http://arstechnica.com/secu

There was an ars article (http://arstechnica.com/security/2013/10/meet-badbios-the-mysterious-mac-and-pc-malware-that-jumps-airgaps/ http://arstechnica.com/security/2013/10/meet-badbios-the-mys...) that was on HN just a few days ago describing all sorts of ways to hide rootkits in nearly any component of your machine with programmable firmware.