He also, according to Fox, fact-checked LuzSec claims to have penetrated various government web sites to give FBI agents guidance on which required quick responsed. LulzSec hacktivists rarely stole or destroyed information after penetrating the secure sites, FBI officials told Fox.
The 51-day hacking spree against targets such as the U.S. Senate, FBI, CIA and various commercial sites put LulzSec on the target list of almost every federal law enforcement agency with any cybersecurity capabilities at all.
Other hackers and hacking groups, including WebNinjas, TheJester and TeamP0is0n also helped the FBI, though covertly, by doxing or exposing the home domain names, email or text correspondence and sometimes street addresses and proper names of LulzSec members, including Sabu.
The FBI did not identify the information that led it to Sabu, though other members of LulzSec were arrested last fall after revealing themselves in a variety of relatively simplistic ways.
The five arrested this morning face a variety of charges, including conspiracy, illegal intrusion into protected sites, data theft and identity theft.
The FBI views the arrests as "chopping the head off LulzSec," according to one Fox source. The organization that called itself LulzSec claimed to have disbanded in June, though individual members continued their activites as individuals or members of Anonymous as well as continuing to work with extant LulzSec members, giving the group de facto life long after members retired the name to try to escape heat from the FBI and other groups.
The revelation that Sabu turned his coat to help gather evidence on other hackers isn't likely to go down well with other LulzSec'ers or hackers who view themselves as fringers too radical for the comparatively careful and purposeful operations launched by Anonymous.
"You might be a messiah in the hacking community but you’re still a rat,” one investigator told Fox.
Another, apparently believing Sabu and LulzSec remain leaders of the skeptical, meritocratic, script-kid-dismissing upper echelons of the hacking community, predicted the revelation would have an even greater impact:
"When people in the hacking community realize their God has actually been cooperation with the government, it’ll be sheer terror," Fox quoted him as saying.
As of press time today, Anonymous, WebNinjas, TheJester and TeamP0is0n had not made any public admission of their terror.