Gameover Zeus, for those who've never heard of it in the past, is a P2P malware that pilfers banking information and initiates wire transfers to overseas bank accounts. It's typically propagated through spam emails disguised as bills or invoices embedded with malicious links -- the kind you tell your grandparents to never click. Once Gameover worms its way into a system, that computer becomes part of the extortion ring's global network of infected machines, which funnel ill-gotten info back to the criminals. The perpetrators would sometimes also install compromised PCs with Cryptolocker, a "ransomware" that takes users' files hostage until they pay up. According to the FBI's estimates, the criminals have stolen over $100 million using both Gameover and Cryptolocker. But whether that's enough for Bogachev to stand trial in the US (home to 25 percent of the affected machines) remains to be seen, as Russia does not extradite accused criminals. For now, all the authorities can do is spread word about the botnet and help people remove it from their computers.