the computer's startup function and that led the fbi to warn the malware can be so destructive that the data is not recoverable or too costly to retreat h tree. evidence assaults the final stage of the attack was launched from outside of north korea's borders, creating plausible deniable, but in almost all of the cybereventses now we see the use of a proxy or cutout to confuse investigators. >> there's been a worldwide cyberward for years now but feels like this one is the one that wakes everybody up. >> u.s. intelligence officials say that sonny hack is really a watershed event because it's believed to be the first time destructive malware has targeted a firm inside the u.s., and that put is it on par with the 2010 attack on iran's nuclear program that destroyed the centrifuges after malware was physically introduced into their computer system, and within the last hour, the state department really echoing what we heard