The company also demanded that Twitter pass its letter on to those who share leaked information.
"In addition, we ask that you provide the Account Holder with a copy of this letter, and request that the Account Holder cease publication of the Stolen Information on Twitter," the letter said, as quoted by the media outlet.
According to Motherboard, a Twitter spokesperson has confirmed the letter as authentic.
On November 24, Sony Pictures Entertainment was the victim of a cyber-attack by an entity describing itself as the 'Guardians of Peace'. According to media reports, salary figures, credit card numbers, private emails and passwords were among the stolen data. The hackers also made terror threats to the company and US movie theaters over the release of 'The Interview,' a comedy about an assassination attempt of North Korean leader Kim Jong Un. The company canceled the Christmas release of the film.