The servers of Sony Pictures have suffered a security breach, resulting in an information leak and leaving the company out of service. Moreover, the cybercriminals, self-named #GOP, have requested that this fact be made public altogether with additional information, otherwise threatening with the distribution of confidential information of the company.
Update 16/04/2015: Wikileaks has released the documents obtained in the Sony´s incident.
Update 08/06/2018: The North Korean spy Park Jin Hyok, who belongs to a group of computer criminals known as Lazarus, has been accused by the USA of being behind the attack to Sony Pictures and the WannaCry 2.0 worm. The latest information about the accused is that he returned to North Korea, after working in China for a company linked to the North Korean government.