FBI Warns Business Of 'Destructive' Malware Attackes In The Wake Of Sony Hack.

According to Reuters, the FBI has warned businesses in the USA via a confidential report about new malicious software that can be used to launch "destructive" cyber attacks, which explains that U.S. businesses should remain vigilant. Last week Sony Pictures was hacked and and investigators are still at task.
The report does not directly connect the Sony incident but the five page FBI report mentions about the malware used in the attack. It advices business how to react to the Malware and to report any suspected malware to FBI.
The malware overrides all data on hard drives of computers, including the master boot record, which prevents them from booting up.The hard drives will need to be replaced or re imaged after such attacks and is very time consuming.
Reuters