Nemesis Malware

[silicon_toad2000]

Malware known as Nemesis takes control of the boot process on PCs to
evade detection. Nemesis steals payment card data from the PC's memory;
the malware loads before the operating system does.
http://arstechnica.com/security/2015/12/nemesis-malware-hijacks-pcs-boot-process-to-gain-stealth-persistence/