Today's cybercrooks are becoming ever more tightly organized. Like the Mafia, hacker groups have virtual godfathers to map strategy, capos to issue orders, and soldiers to do the dirty work. Their omertà, or vow of silence, is made easier by the anonymity of the Web. And like legit businesses, they're going global. The ShadowCrew allegedly had 4,000 members operating worldwide -- including Americans, Brazilians, Britons, Russians, and Spaniards. "Organized crime has realized what it can do on the street, it can do in cyberspace," says Peter G. Allor, a former Green Beret who heads the intelligence team at Internet Security Systems Inc. in Atlanta.

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