the united states blames north korea for the attack because of the sony movie the interview mocking the north korean leader kim un. new details. reporter: tonight we have new insights how sony might have been breached according to a cachet of sony documents posted on wikileaks, the attacks use add classic hacking technique, and it had been scoping around sony s system for several weeks before the hack was publicly revealed. mid-october, 2014. an e-mail appearing to be from direct iroliver stone lands in the inbox of amy pascal the co-chair of sony pictures movie division. stone is making a film about nsa leaker edward snowden. the e-mail says it s an important message with a secure document. turns out the e-mail s not from stone, who later sends out a warning his account was compromised. this is what cyber sleuths call a weaponized document. we don t know ultimately if this was the e-mail that led to the breach but we know it could