Cyber criminals are in the process of rebuilding the GOZ (Gameover Zeus) botnet, which law enforcement authorities took over in June, and recent research suggests that they've had some success, especially in the U.S. The original GOZ botnet was built using a modified version of the infamous Zeus trojan program and was designed to steal online banking and other credentials from infected computers. The GOZ malware authors created a command-and-control infrastructure with a peer-to-peer architecture, making their botnet more resilient to takeover attempts.