Sony is facing further problems as hackers have stolen virtual points from Japanese Sony account holders.
So-Net, the ISP unit of Japan's Sony, alerted customers that an intruder broke into its system and stole virtual points from account holders worth $1,225.
The latest hack comes after personal information of around 100 million Sony user accounts was stolen last month in a hack of online gaming systems, the PlayStation Network and Sony Online Entertainment.
"What we've done is stopped the So-Net points exchanges and told customers to change their passwords," So-Net said.
About 100,000 yen ($1,225) was stolen from accounts that were attacked.
The company said there was no evidence that other accounts in the online system had been hacked.
"At this point in our investigations, we have not confirmed any data leakage. We have not found any sign of a possibility that a third party has obtained members' names, address, birth dates and phone numbers."
Security experts have told Reuters that Sony's networks around the world remain vulnerable to attack.
Sony in the U.S. could not immediately be reached.