What evidence do you have to say it wasn't north Korea?
(Actually curious not trying to be a dick)
It's not that I have evidence it was someone else.
My understanding is that agencies try to identify hackers through signatures and style. However hackers spend just as much time disguising what they do. The article below cites this. If a hacker is sophisticated enough to hack Sony they are sophisticated enough to make it look like North Korea did it.
One of the evidence items is that some files were compiled on a computer using the korean language. So what?
Or the FBI could simply be lying . The FBI is sometimes like the local police sheriff who would rather string up an innocent guy than admit he doesn't know who did it. North Korea is an easy target as everyone just shakes fist and says...yeah evil! And then the media repeats North Korea 1,000,000 times and nobody thinks to actually ask how they came to that conclusion.
And what does "North Korea" mean? The government? A group in North Korea? A group sponsored by North Korea sitting in Iran?
I always laugh at how we fall for the same lines every time. Could have been Canada for all we know.