Ex-LulzSec chief Sabu orchestrated attacks on government computers in Iran, Syria, Pakistan and Brazil while under the control of the FBI, according to a New York Times investigation.
After he was apprehended and turned to became an FBI informant, Hector Xavier "Sabu" Monsegur encouraged fellow Anonymous hackers to hit foreign websites using a zero-day vulnerability in server-side software.
Data stolen during the hacking spree was then uploaded to a server that was secretly monitored by the Feds, it's claimed.
The allegations are based on copies of court documents as well as interviews with individuals linked to the network assaults by the New York Times.
Monsegur was arrested in September 2011, and since then he has been working with the Feds as an informant against his online brothers-in-arms. This only became public knowledge in March 2012. During the eight months in between, Sabu was coordinating a hacking spree by the LulzSec cyber-gang and elements of the wider Anonymous movement, all while pushing a list of targets on behalf of his US government handlers, it is claimed.
Source and Full Story Here: http://www.theregister.co.uk/2014/04/24/fbi_snitch_tied_to_foreign_gov_hacking/