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Sunday, November 21, 2010


Stuxnet is a Windows-specific computer worm first discovered in June 2010 by VirusBlokAda, a security firm based in Belarus. It is the first discovered worm that spies on and reprograms industrial systems,[1] the first to include aprogrammable logic controller (PLC) rootkit,[2] and the first to target critical industrial infrastructure.[3] It was specifically written to attack Supervisory Control And Data Acquisition (SCADA) systems used to control and monitor industrial processes.[4] Stuxnet includes the capability to reprogram the PLCs and hide its changes.[5]
The worm's probable target has been said to have been high value infrastructures in Iran using Siemens control systems.[6][7] According to news reports the infestation by this worm might have damaged Iran's nuclear facilities in Natanz[8][9] and eventually delayed the start up of Iran's Bushehr Nuclear Power Plant.[10] Siemens has stated, however, that the worm has not in fact caused any damage.[11]
Russian digital security company Kaspersky Labs released a statement that described Stuxnet as "a working and fearsome prototype of a cyber-weapon that will lead to the creation of a new arms race in the world." Kevin Hogan, Senior Director of Security Response at Symantec, noted that 60% of the infected computers worldwide were in Iran, suggesting its industrial plants were the target.[12] Kaspersky Labs concluded that the attacks could only have been conducted "with nation-state support", making Iran the first target of real cyberwarfare.[13][14][15]

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