Sony, which is still reeling from a hacking attempt in April, has been hit by another massive data breach. This time the victim is SonyPictures.com.

A hacker group called Lulz Security, the master hackers who attacked the PBS website last week and posted a fake story about rapper Tupac Shakur being alive, claimed credit.

The news came after a day that Sony brought the Sony PlayStation store back online, finally making the Playstation Network whole again after April’s devastating security breach.

Meanwhile, the hacking of Sony Pictures has no effect on the Playstation Network. Still, this is another embarrassing security breach for Sony, and a sign that the company isn’t finished fending off hackers.

The group claimed the single attack exposed the personal information for more than 1 million people and all admin details of Sony Pictures along with 75,000 'music codes' and 3.5 million 'music coupons. But the group lacked the resources to copy such a massive amount of data.

As proof for hacking Sony, LulzSec has published Sony’s alleged compromised data on www.mediafire.com. The unzipped folder contains 4.66 MB of information, including what is claimed to be emails and passwords of Sony’s The Young and the Restless users.

The security breach is the latest attack against high-profile firms, including defense contractor Lockheed Martin and Google Inc.

“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?” the hacking group said in a statement.

Reuters reported that Sony has said it is investigating the hacking claim.

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