Hackers distributed malware that caused the target computers to shut down, routing the attack through computers in other countries to conceal their identity, the investigators said.
These films will be released and distributed as part of our target slate of 8-10 live-action films per year, and will augment Disney's already strong creative pipeline for many years to come.
The group said it had used a distributed denial of service attack (DDoS) which bombards a target website with so much data that it becomes overwhelmed.
The attackers have used a tactic known as Distributed Denial of Service (DDoS), which floods the intended target with large amounts of traffic in an attempt to render it unreachable.
Sony was the target of a number of cyber attacks last year, kicking off with a distributed denial of service attack by the hacktivist and trolling network Anonymous in April 2011.