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Stuxnet
Stuxnet is a computer worm discovered in June 2010. It is speculated to have been created by United States and Israeli agencies to attack Iran’s nuclear facilities. Stuxnet initially spreads via Microsoft Windows, and targets Siemens industrial control systems. While it is not the first time that hackers have targeted industrial systems, the first publicly known intentional act of cyberwarfare to be implemented, it is the first discovered malware that spies on and subverts industrial systems, and the first to include a programmable logic controller (PLC) rootkit.