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Latest worm virus 201012/2/2023 Running the SCADA software, the PLC controls the process at hand within strict safety limits, switching motors on and off, say, and emptying vessels, and feeding back data which may safely modify the process without the need for human intervention – the whole point of industrial automation. Instead, the equipment used in an industrial process is controlled by a separate, dedicated system called a programmable logic controller (PLC) which runs supervisory control and data acquisition software (SCADA). Industrial machinery is not controlled directly by the kind of computers we all use. Why is a different type of worm needed to attack an industrial plant? “Giving an attacker control of industrial systems like a dam, a sewage plant or a power station is extremely unusual and makes this a serious threat with huge real world implications,” says Patrick Fitzgerald, senior threat intelligence officer with Symantec.
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