itwbennett writes: Researchers from Palo Alto Networks warn that attackers are using Word documents with malicious macros and PowerShell to infect computers with fileless malware. The rogue PowerShell script performs a variety of checks on the computer aimed at finding systems that are used to conduct financial transactions and to avoid systems that belong to security researchers as well as medical and educational institutions. "Due to the target-specific details contained within the spam emails and the use of memory-resident malware, this particular campaign should be treated as a high threat," the Palo Alto researchers said in a blog post. A similar combination of PowerShell and fileless malware was observed last week by researchers from the SANS Institute's Internet Storm Center.
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