The Stuxnet worm is a sophisticated "rootkit" for Siemens S7 PLCs. While there is only circumstantial evidence as to who wrote the worm and what the worm's target was, most analysts suggest the worm was created by a military or intelligence agency, and targets gas-centrifuge uranium enrichment facilities. The Stuxnet worm is the first clear, public evidence of sophisticated adversaries using computer malware to sabotage control systems. Given that many nations have announced funding for cyber-warfare capabilities, few analysts believe that this worm is the last we will see of malware designed for industrial sabotage.
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