Sony Pictures Entertainment is pressing media outlets against using data hackers have leaked about the studio, according to a letter sent to groups including The New York Times. The letter, signed by lawyer David Boies, said the "stolen information" must be destroyed and should not make it to publication.

The studio "does not consent to your possession, review, copying, dissemination, publication, uploading, downloading or making any use of the stolen information, and to request your cooperation in destroying the stolen information," Boies wrote in the letter.

The "leaked" information is related to salaries, employee health records, unpublished scripts and email exchanges about movie stars and filmmakers. The emails included racial jokes related to U.S. President Barack Obama and disparaging remarks about top actors.

The group that claims to have hacked Sony's servers has demanded its movie studio pull a comedy depicting a fictional CIA plot to kill North Korea's leader.

North Korea has officially denied responsibility for the hack against Sony's servers, but has said that it could be potentially orchestrated by supporters furious over the movie "The Interview," due out on Christmas Day.

In the meantime, a a message claiming to be from the Guardians of Peace, a group that says it carried out the cyber attack on Sony, warned of additional disclosures during the weekend.

"We are preparing for you a Christmas gift," said the message posted on a site for sharing files called Pastebin. "The gift will be larger quantities of data. And it will be more interesting."