Hackers are tapping into the backdoor again at Sony Entertainment Network and Playstation Network due to a massive set of sign-in IDS and passwords were obtained.
The attempts appear to be a large amount of data obtained from a set of compromised lists from other companies, sites and sources. It is likely the data came from another source and not from Sony’s Networks. Sony have taken steps to mitigate the activity. Less than one tenth of one percent (0.1%) of our PSN, SEN and SOE audience may have been affected. There were approximately 93,000 accounts globally (PSN/SEN: approximately 60,000 accounts; SOE: approximately 33,000) where the attempts succeeded in verifying those accounts’ valid sign-in IDs and passwords, and Sony have temporarily locked these accounts. Only a small fraction of these 93,000 accounts showed additional activity prior to being locked.
As a preventative measure, Sony are requiring secure password resets for those PSN/SEN accounts that had both a sign-in ID and password match through this attempt. If you are in the small group of PSN/SEN users who may have been affected, you will receive an email from Sony at the address associated with your account that will prompt you to reset your password.
Via PlayStation Blog