"The FBI has concluded the Government of North Korea is responsible for the theft and destruction of data on the network of Sony Pictures Entertainment. Attribution to North Korea is based on intelligence from the FBI, the U.S. intelligence community, DHS [Department of Homeland Security], foreign partners and the private sector,"It looks like the FBI are sticking to their guns regarding their claims that North Korea is behind the Sony hack. The folks from Norse even met with FBI investigators, yet the FBI isn't backing down: FBI maintains that North Korea hacked Sony as detractors mount
That looks pretty definite to me. Strange...or maybe not.