An hour earlier, he had dispatched three friends to pick up another case, but they were nowhere in sight. He looked out over the controlled chaos of his tiny one-bedroom apartment in small-town Bavaria. (Most of the virus writers I visited live in Europe; there have been very few active in the United States since 9/11, because of fears of prosecution.) Philet0ast3r's party was crammed with 20 friends who were blasting the punk band Deftones, playing cards, smoking furiously and arguing about politics. It was a Saturday night. Three girls sat on the floor, rolling another girl's hair into thick dreadlocks, the hairstyle of choice among the crowd. Philet0ast3r himself -- a 21-year-old with a small silver hoop piercing his lower lip -- wears his brown hair in thick dreads. (Philet0ast3r is an online handle; he didn't want me to use his name.)
Philet0ast3r's friends finally arrived with a fresh case of ale, and his blue eyes lit up. He flicked open a bottle using the edge of his cigarette lighter and toasted the others. A tall blond friend in a jacket festooned with anti-Nike logos put his arm around Philet0ast3r and beamed.
''This guy,'' he proclaimed, ''is the best at Visual Basic.''
In the virus underground, that's love. Visual Basic is a computer language popular among malware authors for its simplicity; Philet0ast3r has used it to create several of the two dozen viruses he's written. From this tiny tourist town, he works as an assistant in a home for the mentally disabled and in his spare time runs an international virus-writers' group called the ''Ready Rangers Liberation Front.'' He founded the group three years ago with a few bored high-school friends in his even tinier hometown nearby. I met him, like everyone profiled in this article, online, first e-mailing him, then chatting in an Internet Relay Chat channel where virus writers meet and trade tips and war stories.
Philet0ast3r got interested in malware the same way most virus authors do: his own computer was hit by a virus. He wanted to know how it worked and began hunting down virus-writers' Web sites. He discovered years' worth of viruses online, all easily downloadable, as well as primers full of coding tricks. He spent long evenings hanging out in online chat rooms, asking questions, and soon began writing his own worms.
