The Gozi virus, a malicious password-stealing software which the US government has called "one of the most financially destructive computer viruses in history," is believed to be responsible for up to $50 million in fraud. Federal authorities have identified and captured its developer, a 25-year-old Russian man named named Nikita Kuzmin. But the bulletproof host of the virus continued to orchestrate the distribution of malicious messages, and was the more interesting catch.