One of its key players turned out to be an FBI informant and Anonymous is frustrated, so it's acting out in classic fashion by knocking the website of a computer security firm offline and posting the employees' logins on Pastebin, but the retaliation is small compared to its past actions. Anonymous acted against Panda Labs, but its real focus is on Sabu, the lead hacker who reportedly sold out key Anonymous members as part of a quiet deal with investigators months ago. Unlike its massive take-down of the Department of Justice and industry websites in the wake of the Megaupload shutdown, Anonymous targeted a small firm, defacing its website mostly with a screed against its former member.

The hacking collective tweeted on Tuseday night that it had taken down the website for Panda Labs, locking the cybersecurity firm out of its own servers in return for its alleged cooperation with federal investigators. Panda Labs' website is still down. Panda Security's main website is working, but Panda Labs won't load, 12 hours or so after Anonymous first claimed the attack. A cached version of the site shows it defaced with a screed against Sabu and the FBI, as well as an embed of Anonymous's LulzXmas video

"It's sad and we can't imagine how it feels having to look at the mirror each morning and see there the guy who shopped their friends to police," the group wrote, followed by a series of shout-outs to activists and friends before finally getting to its justification for attacking Panda Labs:

hello friends! Pandasecurity.com, better known for its shitty ANTIVIRUS WE HAVE BACKDOORED, has earning money working with Law Enforcement to lurk and snitch on anonymous activists. they helped to jail 25 anonymous in different countries and they were actively participating in our IRC channels trying to dox many others. 

Panda denied the hackers had gotten into the firm's internal servers, according to Computerworld, and said they'd just accessed some information related to marketing campaigns, not any key security components. Anonymous warned on another Twitter account: "Something big is coming. Get ready for a memorable March."  But so far its retaliation has been pretty limited.