Anonymous hackers attack security firm who had been investigating their membership. HBGary Federal had been working on unmasking their identities in cooperation with an FBI investigation into the attacks against WikiLeaks. The Twitter account of HBGary’s CEO, Aaron Barr, was also compromised and tweeted multiple offensive messages, as well as his home address, social security number and cell phone. It appears HBGary was victimized by a combination of social engineering and a shared password between systems. The criminal activities outlined by their own bragging could get them some serious prison time in the U.S.
Source: https://thehackernews.com/2011/02/hbgary-federal-hacked-and-exposed-by.html