New evidence emerged about hacker attacks to servers of Sony Pictures showed that the attack was carried out by using malicious software (malware). Evidence was found by a number of parties, one of which is the Federal Bureau of Investigation (FBI).
In its report, the FBI wrote that the malware will take over all the data from the hard drive, including the master boot record. This is why these computers can not be turned on.
Malware was also overwrite existing data on the hard drive with new data. According to the report, this makes repairing these data are very difficult when using standard forensic methods.
The FBI reports sent to companies in the United States so that they can prepare to face similar attacks.
While The Verge, Tuesday (12/02/2014) reported that this malware has code that can be practically identical with the malware that attacked South Korea in March 2013.
At that time, there were a number of cyber attacks to several banks and media broadcasting in South Korea. The attack was believed to South Korea carried out by its neighbors, North Korea.
This corresponds to the direction of previous investigations already carried out by Sony. They investigated the relationship of these attacks by North Korea. The base of the problem, Sony will soon release a controversial comedy film which tells about the plan to murder the North Korean leader, Kim Jong-Un.