LulzSec frontman Sabu was FBI informant, fed Stratfor docs to Wikileaks from an FBI-owned computer

Hector Xavier Monsegur, AKA Sabu, who is allegedly the mastermind of hacking group, LulzSec

The Guardian has more on the big hacking news which Fox News broke yesterday (as noted in a post by Rob). "Sabu," the trash-talking, self-appointed leader of LulzSec, has been working for the FBI for the last six months. The FBI says he helped the US and various European governments identify and arrest five alleged LulzSec members charged with participating in defacement, DDOSing, and "doxing" against high-profile government and corporate targets. Sabu (above) is, in now identified as Hector Xavier Monsegur, a 28-year-old unemployed Puerto Rican guy living in New York, and a father of two. He was charged with 12 criminal counts of conspiracy to engage in "computer hacking and other crimes" last year, pled guilty in August, 2011, then "snitched" on his LulzSec friends.

Here's the FBI news release, which notably omits the names of any prosecutors (perhaps for fear of Anonymous attack).

Snip from Guardian story:

His online "hacker" activity continued until very recently, with a tweet sent by him in the last 24 hours saying: "The feds at this moment are scouring our lives without warrants. Without judges approval. This needs to change. Asap."

In a US court document, the FBI's informant – there described as CW – "acting under the direction of the FBI" helped facilitate the publication of what was thought to be an embarrassing leak of conference call between the FBI and the UK's Serious and Organised Crime Agency in February.

Officers from both sides of the Atlantic were heard discussing the progress of various hacking investigations in the call.

A second document shows that Monsegur – styled this time as CW-1 – provided an FBI-owned computer to facilitate the release of 5m emails taken from US security consultancy Stratfor and which are now being published by WikiLeaks. That suggests the FBI may have had an inside track on discussions between Julian Assange of WikiLeaks, and Anonymous, another hacking group, about the leaking of thousands of confidential emails and documents.

The indictments mark the most significant strike by law enforcement officials against the amateur hacker groups that have sprung out of Anonymous. These groups, which include LulzSec, have cost businesses millions of pounds and exposed the credit card details and passwords of nearly 1 million people.