The Department of Homeland Security along with the FBI and Department of Justice have made sweeping moves to shut down the systems of the GameOver Zeus Botnet. GameOver, which has infected hundreds of thousands of computers around the globe, allows cyber criminals to gain access to bank accounts, specifically pulling account numbers and access credentials.
Now, there's a two-week window for companies and consumers to protect themselves. After that, another wave of Botnets is expected to become active. GameOver can take down a machine (Windows PCs, specifically) through phishing attacks. Phishing generally comes in the form of emails that look legitimate, such as bills and bank statements, but are coming from a spoofed email address.
GameOver is one of the most elaborate cyber threats on the Internet today. The security agencies who have worked to take it down are also seeking the culprit behind it. They believe that GameOver and another virus, Cryptolocker (which stole your files and held them for ransom), were the doings of a Russian hacker gang, run by Evgeniy Bogachev. Bogachev is now on a number of Most Wanted criminal lists.