HBO hackers demand millions in ransom for stolen dataA group of hackers posted some documents of stolen HBO files online Monday, and demanded a multi million-dollar ransom from the network to prevent further leaks and other sensitive branded files.

The latest leak includes another half-gigabyte sample of the group’s stolen digital goods;it claims to have 1.5 terabytes in all. Beyond those leaked scripts, the reveal contains numerous HBO documents, including emails, job offer letters for several of its top executives, and financial balance sheets.

According to the Hollywood Reporter, the hackers also delivered a video letter to HBO CEO Richard Plepler that says “WE successfully breached into your vast network, HBO was one of our tough targets but we succeeded.”

“Our demand is clear: We want XXXX dollars to stop revealing your proprietary files,” the letter reads. “HBO spends 12 million for Market Research and 5 million for GOT7 advertisements. So include us in your advertisements.”

The hackers, in the online disclosures, noted that it took them six months to penetrate the system.They’ve claimed that HBO is their 17th hacking target and only 3 of them have failed to pay.

HBO has said that the forensic inspection is going on. The company is investing the incident and working with law enforcement and some cyber security firms.

“We continue to work around the clock with outside cyber security firms and law enforcement to resolve the incident. Meanwhile, our dedicated employees continue to focus on delivering the high quality of entertainment and service for which we are known,” HBO spokes person said.