How the Sony hack was traced back to North Korea

The FBI statement was definitive: "The North Korean government is responsible" for the cyberattack on Sony.

Play Video
Obama: Sony "made a mistake" pulling movie

The attack was routed through servers in countries all over the world in an effort to hide its origin, but President Obama said North Korea is the sole culprit.  How the Sony hack was traced back to North Korea:

＼ Get the latest news ／