‘Praying Mantis’ threat actor targeting Windows internet-facing servers with malware

Windows internet-facing servers are being targeted by a new threat actor operating “almost completely in-memory,” according to a new report from the Sygnia Incident Response team.

The report said that the advanced and persistent threat actor — which they have named “Praying Mantis” or “TG1021” — mostly used deserialization attacks to load a completely volatile, custom malware platform tailored for the Windows IIS environment.

“TG1021 uses a custom-made malware framework, built around a common core, tailor-made for IIS servers. The toolset is completely volatile, reflectively loaded into an affected machine’s memory and leaves little-to-no trace on infected targets,” the researchers wrote.

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Source: ZDNet