The Gameover Zeus and related Neverquest banking Trojan exploits are one of the most truly frightening security nightmares facing small businesses and individuals. These exploits allow a remote attacker to join you on an online banking session, and then transfer funds from your account after you thought the session was over.
The US State Department has place a $3 million bounty on the head of Evgeniy Mikhailovich Bogachev, The criminal mastermind behind the Gameover Zeus botnet. This exploit has stolen over $100 million from bank accounts all over the globe.
Bogachev has also been accused of being behing the CryptoLocker ransomware exploit.
For more information: Sophos