"It takes time and resources and money to do this day after day," Stewart says. Other, under-the-radar strikes at various botnets and criminal organizations have occurred, he says, but these laudable efforts are "not going to stop the business model of the spammer."

Mushtaq, Stewart, and other security pros agree that federal law enforcement needs to step in with full-time coordination efforts. According to Stewart, regulators haven't begun drawing up serious plans to make that happen, but Mushtaq says that FireEye is sharing its method with domestic and international law enforcement, and he's hopeful.

Until that happens, "we're definitely looking to do this again," Mushtaq says. "We want to show the bad guys that we're not sleeping."