Industrial control systems have been at the center of some scary security stories recently, but investigating malware infections in such environments is not easy because analysts often having a hard time telling suspicious and good files apart.

Security researchers have identified two malware campaigns this year that targeted SCADA (supervisory control and data acquisition) systems — Havex and BlackEnergy. Such attacks are expected to grow in number, as new reports show that state-sponsored hackers are increasingly interested in critical infrastructure companies.

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