North Korea has officially denied involvement with the Sony Pictures hack, but claims the malware attack - which shut down the studio's internal systems for over a week - is a "righteous deed" in a statement released on Sunday.

The statement comes after a week of various reports claiming both the FBI and Sony Pictures reviewing the possibility of a North Korean attack.

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North Korea - for the most part - has kept to half-truth and not denying or confirming responsibility. On Thursday, the recluse country denied involvement for the first time.

Sony Pictures has been in a scuffle with North Korea, due to a new movie "The Interview" coming to cinemas this December. The movie's plot involves the assassination of the current leader of North Korea, Kim Jong-Un.

North Korea claims releasing the movie in the U.S. is "an act of war", although similar threats have been made by the communist country before, followed by silence.

It appears Sony Pictures is not fussed and will continue to work on the movie, featuring Seth Rogen, one of the many employees at Sony, who had their payment released by the #GOP.

The FBI is still investigating the malicious attack, stated to be the largest attack ever on a corporate entity. The agency has many potential suspects, including various state-sponsored groups.

The group got in touch with thousands of employees earlier this week, to warn them that working with Sony Pictures is evil, and their families may be targeted. The anonymous leader of #GOP claimed the hacking group was a global organization.

Over 10 terabytes of data was stolen from Sony Pictures internal systems. Currently, around 20GB of data has been uploaded onto the Web, containing movies, internal business documents, visas and passwords.

Sony Pictures has most of its internal systems back online, although it is not confirmed if employees are safe from the #GOP group, who could hold private information on all employees, including addresses, passwords and credit information.

TagsNorth Korea, Sony Pictures, hack, FBI, malware attack, The Interview