A hacking group named LulzSec made headlines recently for attacking high visibility targets, including Sony and the U.S. government. LulzSec announced earlier this week that it was stopping its operations, and rumor has it many of the members joined up with Anonymous’ “AntiSec” hacking group. Now that group is making its own headlines. On Tuesday AntiSec claimed responsibility for attacks against Universal and Viacom. According to The Wall Street Journal, the hackers released personal data, including passwords, from the Universal Music Website. It also obtained and leaked information about Viacom’s network. It’s unclear how many users were affected by the security breach, although we hope to hear an official word from both firms in the near future.