Malicious virus shuttered US power plant: DHS
The Department of Homeland Security report did not identify the plant but said criminal software, which is used to conduct financial crimes such as identity theft, was behind the incident.
It was introduced by an employee of a third-party contractor that does business with the utility, according to the agency.
DHS reported the incident, which occurred in October, along with a second involving a more sophisticated virus, on its website as cyber experts gather at a high-profile security conference in Miami known as S4 to review emerging threats against power plants, water utilities and other parts of the critical infrastructure.
In addition to not identifying the plants, a DHS spokesman declined to say where they are located.
Interest in the area has surged since 2010 when the Stuxnet computer virus was used to attack Iran's nuclear program. Although the United States and Israel were widely believed to be behind Stuxnet, experts believe that hackers may be copying the technology to develop their own viruses.
Justin W. Clarke, a security researcher with a firm known as Cylance that helps protect utilities against cyber attacks, noted that experts believe Stuxnet was delivered to its target in Iran via a USB drive. Attackers use that technique to place malicious software on computer systems
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