http://www.computerworld.com/s/article/9188147/Iran_admits_Stuxnet_worm_infected_PCs_at_nuclear_reactor 

By Gregg Keizer
Computerworld
September 27, 2010 

Although some computers at Iran's Bushehr nuclear reactor were infected 
by the Stuxnet worm, none of the facility's crucial control systems were 
affected, Iranian officials claimed Sunday.

The news followed Saturday's admission by Iran that Stuxnet had infected 
at least 30,000 computers in the country. The worm, which researchers 
have dubbed the most sophisticated malware ever, targets Windows PCs 
that manage large-scale industrial-control systems in manufacturing and 
utility companies.

Those control systems, called SCADA, for "supervisory control and data 
acquisition," manage and monitor machinery in power plants, factories, 
pipelines and military installations.

"The studies show that few PCs of Bushehr nuclear power plant workers 
are infected with the virus," Mahmoud Jafari, the facility's project 
manager, told Iran's state-run Islamic Republic News Agency on Sunday.

[...]


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