Symantec Discovers 'Regin', One Of The Most Powerful Computer Viruses Ever Built

Symantec said Monday it uncovered a piece of malware propagating around the world that's used for spying on Internet service and telecommunications companies. The virus, which has been dubbed "Regin," is of unknown origin, but researchers at the security company say the malware's construction is sophisticated enough that it may have come from hackers backed by a nation-state.

An outline of how Regin malware infects host computers.