Obama and his advisers are weighing a range of options on how to punish North Korea.
The United States stands by its assertion that North Korea was to blame.
Sony cancelled the release the movie 'The Interview' amid threats to attack US cinemas showing the film.
Sony on Wednesday pulled the Christmas Day release of the film depicting a fictional assassination.
An unnamed spokesman of the North’s foreign ministry said there would be “grave consequences”.
The US called it an unacceptable act of intimidation and vowing to impose "costs and consequences".