Hacker group LulzSec, previously in the news for posting hoax Tupac story on PBS’s website, has announced they will continue to attack Sony’s online networks, a report on The Escapist said.

The group previously claimed hacking Sony BMG’s Greek website and more recently the PBS website where they said Tupac Shakur, the deceased rapper, is still alive and residing in New Zealand.

The warning reached Sony even before the group compromised the PBS site. The group made a Twitter post on May 27 that this was “the beginning of the end" for Sony Corporation.

Naming the project ‘Sownage’, the group said they would start their operation from May 31 and renewed the earlier post later by saying the operation had already started and they have been partially successful till date. The group added they were compromising Sony’s internal assets which the company failed to notice.

The original assaults against Sony were said to be a reaction to the company suing hacker George Hotz and then dealing with him in an out of court settlement.

Almost like clockwork, another attack on Sony has taken place. Following up on its threat from late last month, hacker group LulzSec has once again hacked Sony, and this time the damage could be more serious than its previous attack on Sony BMG. In a press release, the group claims it broke into SonyPictures.com and, among other things, compromised the personal data of more than one million users', including home addresses, e-mail addresses, passwords, and more.

The group has not taken responsibility for the attack on the PlayStation Network in April. The exact target of its recent threat was unclear, although it has since stated on its Twitter account several times that it wasn't going after gaming services. The group recently made headlines by hacking PBS and posting a spurious story about rapper Tupac Shakur being found alive.

LulzSec says it did not steal all of the personal information hosted on Sony Pictures' website due to a lack of resources. Regardless, that's not a very reassuring statement, and it's incredibly alarming that Sony continues to be targeted by hackers with repeated success. In this case, a SQL injection -- a very simple type of attack -- was successfully used to gain access to "everything." Worse yet, users' passwords were allegedly stored in plaintext, meaning they were not encrypted as one would expect them to be.

Sony brought the PlayStation Network back online several weeks ago followed by the PlayStation Store last night. Since the attack that forced Sony to bring PSN down in the first place, the Japan-based company has been the target of hackers several more times.

“Our goal here is not to come across as master hackers, hence what we’re about to reveal: SonyPictures.com was owned by a very simple SQL injection, one of the most primitive and common vulnerabilities, as we should all know by now,” the group wrote, “From a single injection, we accessed EVERYTHING. Why do you put such faith in a company that allows itself to become open to these simple attacks?”

“This is disgraceful and insecure,” the group went on to say. “They were asking for it.”