The Industrial Control System Cyber Emergency Response Team (ICS-CERT) has issued an alert on February 3, 2012, concerning SSH scanning activity that is targeting control systems. The agency states that this Alert is being issued to inform critical infrastructure and key resource (CIKR) asset owners and operators of recent and ongoing activity involving secure shell(SSH), a scanning of Internet facing control systems.
As recently as this week, ICS-CERT received a report from an electric utility experiencing unsuccessful brute force activity against their networks. The full alert is available for review here.
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