In June of 2009, someone silently unleashed a sophisticated and destructive digital worm that began slithering its way through computers in Iran with just one aim — to sabotage the country’s uranium enrichment program and prevent President Mahmoud Ahmadinejad from building a nuclear weapon.
But it would be nearly a year before inspectors would learn of this. The answer would come only after dozens of computer security researchers around the world would spend months deconstructing what would come to be known as the most complex malware ever written (Stuxnet) — a piece of software that would ultimately make history as the world’s first real cyberweapon.
From Wired Magazine: http://www.wired.com/threatlevel/2011/07/how-digital-detectives-deciphered-stuxnet/all/1