Windows DID it.
"The Windows flaw was unknown before Stuxnet's discovery in 2010, according to Roel Schouwenberg, one of the Kaspersky Lab researchers who helped discover the Flame virus.
Kaspersky Lab researchers did not find the Flame components in more advanced versions of Stuxnet, added Schouwenberg.
"Flame was used as some sort of a kick-starter to get the Stuxnet project going," Schouwenberg theorized. "As soon as the Stuxnet team had their code ready, they went their way."
He suspected the creators of Stuxnet removed the borrowed components from later versions so the Flame program would not be compromised if the attack on the Iranian nuclear program was discovered.
Stuxnet was discovered in 2010 and has been closely scrutinized by the world's smartest cyber sleuths. Yet Flame remained hidden until last month, when a United Nations agency asked Kaspersky Lab to look for a virus that Iran said had sabotaged its computers, deleting valuable data.
When Kaspersky's team started looking for suspicious files in the Middle East, they found Flame.
Eugene Kaspersky said at the Reuters Summit his firm recently agreed to advise on geopolitical Internet security issues more broadly for the U.N.'s International Telecommunication Union. Russia and others want the group to take a more active role in Internet governance.
Schouwenberg said he suspected Flame may be capable of deleting data and attacking industrial control systems that run plants like the uranium enrichment facility at Natanz, but he has yet to find the evidence.
Kaspersky Lab researchers are still trying to understand the function of more than 100 mysterious files built into the Flame samples that they have discovered, he said."
http://www.reuters.com/article/2012/06/12/us-media-tech-summit-flame-idUSBRE85A0TN20120612
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