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RedCurl Cybercrime Group Abuses Windows PCA Tool for Corporate Espionage

March 14, 2024

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The Russian-speaking cybercrime group called RedCurl is leveraging a legitimate Microsoft Windows component called the Program Compatibility Assistant (PCA) to execute malicious commands.

“The Program Compatibility Assistant Service (pcalua.exe) is a Windows service designed to identify and address compatibility issues with older programs,” Trend Micro said in an analysis published this month.

“Adversaries can exploit this utility to enable command execution and bypass security restrictions by using it as an alternative command-line interpreter. In this investigation, the threat actor uses this tool to obscure their activities.”

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