YNOT – The hacker group LulzSec, infamous for attacks on consumer electronics giant Sony, briefly turned its attention to the adult entertainment industry over the weekend.

According to PCWorld.com’s Keir Thomas, the group hacked at least 55 adult entertainment websites and posted 26,000 registered user email addresses and passwords on the LulzSec website and file-sharing sites including The Pirate Bay. Most of the porn-site user details came from pron.com.

“We like porn (sometimes), so these are email/password combinations from pron.com which we plundered for the lulz,” a notice on the LulzSec sites stated.

LulzSec evidently wanted to draw attention to the noticeable number of .mil and .gov email addresses on the list.

“If the individuals concerned use the same passwords with military or government sites, as often happens, this could represent a significant security breach,” Thomas pointed out.

In addition, the group’s breach of porn site servers unveiled patterns at the server-administration level, possibly indicating shared ownership or management of the sites and common security weaknesses.

At least the adult industry is in good company: LulzSec previously invaded not only Sony’s source-code server, but also servers belonging to government agencies like the British State Health Service and Infraguard, an organization with close ties to the FBI.

The gang’s Twitter stream indicates LulzSec spent Tuesday mounting distributed denial of service attacks on servers belonging to popular gaming communities EVE Online, League of Legends and Minecraft.