Anonymous, which briefly knocked the FBI and Justice Department websites offline in retaliation for the US shutdown of file-sharing site Megaupload, is a shadowy group of international hackers with no central hierarchy.
NATO is investigating claims by the hacker group Anonymous that it plundered sensitive data from alliance computers, a NATO official said Friday.
(AP) -- The website of an international prison contractor was defaced by hackers who on Friday replaced the company's home page with a hip-hop homage devoted to former death row inmate Mumia Abu Jamal.
Hackers bent on derailing Anonymous clashed with members of the notorious group at a DefCon gathering in Las Vegas late Saturday.
The online piracy group Anonymous hacked into the Belgian website of industrial giant ArcelorMittal on Friday, posting a video to protest the closure of two blast furnaces in Belgium.
A 24-year-old man allegedly linked to the Anonymous "hacktivist" group was arrested Tuesday over a cyber attack on a website run by the frontman of heavy rock group Kiss, the FBI said.
The vigilante Internet hackers called Anonymous blocked the website of Peru's police who fight against computer crime, a officials said Monday.
The Austrian branch of the hacker group Anonymous accessed the bank data of 96,000 people in an attack on the website of the country's GIS television licence agency, officials said on Monday.
The shadowy underworld of Internet hackers was rocked Tuesday by news that one of the world's most-wanted and most-feared computer vandals has been an FBI informant for months and helped authorities build a case against five ...
The website of the Central Intelligence Agency was briefly inaccessible on Friday after the hacker group Anonymous claimed to have knocked it offline.