By Gregg Keizer
September 25, 2010
Officials in Iran have confirmed that the Stuxnet worm infected at least
30,000 Windows PCs in the country, multiple Iranian news services
reported on Saturday.
Experts from Iran's Atomic Energy Organization also reportedly met this
week to discuss how to remove the malware.
Stuxnet, considered by many security researchers to be the most
sophisticated malware ever, was first spotted in mid-June by
VirusBlokAda, a little-known security firm based in Belarus. A month
later Microsoft acknowledged that the worm targeted Windows PCs that
managed large-scale industrial-control systems in manufacturing and
Those control systems, called SCADA, for "supervisory control and data
acquisition," operate everything from power plants and factory machinery
to oil pipelines and military installations.
According to researchers with U.S.-based antivirus vendor Symantec, Iran
was hardest hit by Stuxnet. Nearly 60% of all infected PCs in the
earliest-known infection were located in that country.
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