No one but Hector Xavier Monsegur can know why or when he became Sabu, joining the strange and chaotic Internet collective known as Anonymous. But we know the moment he gave Sabu up. On June 7, 2011, federal agents came to his apartment on New York’s Lower East Side and threatened the 28-year-old with an array of charges that could add up to 124 years in prison. So Hector Monsegur, who as Sabu had become a mentor and icon to fellow members of Anonymous, surrendered his online identity to a new, equally faceless and secretive master: the FBI.

How Anonymous Picks Targets, Launches Attacks, and Takes Powerful Organizations Down

By Quinn Norton
Wired
July 3, 2012

No one but Hector Xavier Monsegur can know why or when he became Sabu, joining the strange and chaotic Internet collective known as Anonymous. But we know the moment he gave Sabu up. On June 7, 2011, federal agents came to his apartment on New York’s Lower East Side and threatened the 28-year-old with an array of charges that could add up to 124 years in prison. So Hector Monsegur, who as Sabu had become a mentor and icon to fellow members of Anonymous, surrendered his online identity to a new, equally faceless and secretive master: the FBI.

For the next eight months, Sabu continued to rage across the Internet as a core member of AntiSec, a blackhat hacking group within Anonymous. He helped to deface government and corporate websites and even helped bring down the private intelligence firm Stratfor—all, apparently, with the FBI’s blessing as it quietly gathered logs on Monsegur’s fellow “anons.” Law enforcement officials later told Fox News that Monsegur was working out of the FBI offices “almost daily” in the weeks after he pleaded guilty in August and then from his own home thereafter, with an agent watching his activity 24 hours a day. Sometimes agents were even posing as Sabu directly. On Christmas, just after the Stratfor hack, Sabu and I happened to be logged into the same channel on IRC, the chatting protocol that serves as the medium through which most Anonymous members planned large-scale operations. I asked the AntiSec members if they were worried about a law enforcement response to Stratfor. Sabu shot back:

we’re used to that heat

we survived the first rounds of the raids

He was referring to a series of arrests that past summer that had scooped up, worldwide, at least 80 alleged participants in the group. At the time, it was hard to fault his reasoning, since those arrests seemed to have done nothing to slow the group’s terrifying onslaught in 2011. It was a year in which Anonymous burst into the geopolitical consciousness of the world, assisting Arab Spring activists and attacking the security industry, bedeviling law enforcement and intelligence agencies, carrying out countless hacks against Sony and other large corporations. As protest movements spread to the West, Anonymous provided them with crucial logistics (not to mention a great deal of media attention), from the BART protests in San Francisco to the Occupy actions across the US and overseas. Anonymous had figured out how to infiltrate anything, how to mobilize not just machines but physical bodies, all around the globe.

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