Hacker group LulzSec has expanded its activities to the U.S. Senate, releasing internal data from the chamber's databaseall for kicks.

Hacker group LulzSec has expanded its activities to the U.S. Senate, releasing internal data from the chamber's databaseall for kicks.

"We don't like the US government very much. Their boats are weak, their lulz are low, and their sites aren't very secure," LulzSec said in a statement. "In an attempt to help them fix their issues, we've decided to donate additional lulz in the form of owning them some more!"

LulzSec went on to say that the data is a "small, just-for-kicks release" of internal data. "Is this an act of war, gentlemen? Problem?"

"Nothing terribly secret was lost in the breach of the U.S. Senate's web server. LulzSec posted some basic information on the filesystems, user logins and the Apache web server config files," according to Sophos analyst Chester Wisniewski. "The also dumped a directory listing of what appears to be every single file on the server."

Under the Computer Fraud and Abuse Act this hack could earn someone five to 20 years in prison, if convicted, Wisniewski said.

The hack caps off a busy day for LulzSec, which said earlier today that it also of Bethesda Softworks, the gaming company behind first-person shooter "Prey."

"Bethesda, we broke into your site over two months ago. We've had all of your Brink users for weeks. Please fix your junk, thanks!" LulzSec tweeted.

Epic Games also suffered a breach recently, though it was unclear if this was also the work of LulzSec. Nintendo's UK site, meanwhile, posted a phishing warning. LulzSec into Nintendo's site, but it was again unclear if the phishing warning was in response to that hack. LulzSec has actually expressed warm feelings about Nintendo, but the same cannot be said for Sony, which LulzSec has targeted.

Anonymous, meanwhile, which has seen the arrest of several members in and this week over distributed denial of service (DDoS) attacks, has now set its sites on Malaysia. The group is calling on users to attack malaysia.gov.my on June 15 at 7:30pm GMT.