FBI agents arrested a member of the hacker group LulzSec in a massive attack on Sony Pictures Entertainment during the summer. Cody Kretsinger, 23, of Phoenix was indicted Thursday for conspiracy and unauthorized impairment of a protected computer, the Los Angeles Times reported. The FBI said in a statement Kretsinger allegedly hacked the Sony Pictures Web site with others, stole confidential information and later posted the swiped info on the LulzSec Web site and other online forums. Kretsinger tried to hide his online identity by using a proxy server and later permanently deleted the hard drive on the computer he used, the FBI said. LulzSec is a group of "elite computer hackers" that has attacked various government agencies and businesses, including taking responsibility for the Sony Pictures hacks in May and June, the FBI said. The hacker group is part of the larger "international group of hackers" known as Anonymous, responsible for numerous Internet attacks, including PayPal, News Corp. and NATO. FBI agents arrested 16 Anonymous and LulzSec members across the United States in July.