'Sony-pocalypse': Why the Sony hack is one of the worst hacks ever

In a single week, hackers have brought a major Hollywood studio to its knees.

Sony Pictures is dealing with more than downed computers and frozen email. Movies have been leaked, and internal documents have exposed private company memos, along with employees' salaries, Social Security numbers and health information.

One security researcher, Adrian Sanabria, calls it "Sony-pocalypse. "

It's so devastating that the FBI is now warning other companies about the malicious software that infected Sony's computers.

This hack could prove extremely costly to Sony.

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