The hackers are giving regular shouts out to "DFNCTSC," the Defonic Team Screen Name Club, a group of hackers that briefly found notoriety in 2005 after hacking Paris Hilton's Sidekick and posting her contacts online.
When asked if DFNCTSC was responsible for the hack, however, the account replied "nope #lulzsec foo[l]," resurrecting the name of the Anonymous-affiliated group that made a big splash in 2011. It later emerged that LulzSec's leader, Hector "Sabu" Monsegur, was working for the FBI in secret. This tweet from an Anonymous-associated account was retweeted by @BurgerKing while the hacker was in control of the account.
We're guessing the @burgerking social media team is having a bad day...— Anonymous (@YourAnonNews) February 18, 2013