U.S. to announce that North Korea behind Sony hack - CNN

The logo of Sony Corp and a Christmas tree are reflected on the company's 4K television set at the company's headquarters in Tokyo November 18, 2014. REUTERS/Toru Hanai

BOSTON (Reuters) - U.S. investigators have determined that North Korea is behind the cyber attack on Sony Corp's Hollywood studio and plan to announce their findings on Thursday, CNN reported. (Reporting by Jim Finkle)