How Digital Detectives Deciphered Stuxnet the Most Menacing Malware in History

It was January 2010 when investigators with the International Atomic Energy Agency realized something was off at the uranium enrichment plant outside Natanz in central Iran.

Months earlier, someone had silently unleashed a sophisticated and destructive digital worm that had been slithering its way through computers in Iran � to sabotage the countrys uranium enrichment program and prevent President Mahmoud Ahmadinejad from building a nuclear

Source:
http://www.wired.com/threatlevel/2011/07/how-digital-detectives-deciphered-stuxnet/