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The Intrepidus Group reveals some details behind a malware attack that exposed critical systems at an energy company. Using a Microsoft zero-day vulnerability and a bit of social engineering, hackers compromised a workstation and threatened critical SCADA systems, the security vendor says.

Hackers are increasingly targeting law firms and public relations companies with a sophisticated e-mail scheme that breaks into their computer networks to steal sensitive data, often linked to large corporate clients doing business overseas.