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A Zebrocy Go Downloader

A Zebrocy Go Downloader (Malware and Vulnerabilities)

Last year at SAS2018 in Cancun, Mexico, “Masha and these Bears” included discussion of a subset of Sofacy activity and malware that we call “Zebrocy”, and predictions for the decline of SPLM/XAgent Sofacy activity coinciding with the acceleration of Zebrocy activity and innovation. Our original “Zebrocy Innovates – Layered Spearphishing Attachments and Go Downloaders” June 2018 writeup documents the very same downloader, putting the initial deployment of Zebrocy Go downloader activity at May 10, 2018. And in a similar fashion in early June, Zebrocy spearphished over a half-dozen accounts targeting several Central Asian countries’ diplomatic organizations with a similar scheme “2018-05-Invitation-Letter(1).rar//2018-05-Invitation-Letter(pril).docx”, sending out a more common Zebrocy Delphi downloader.

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