A not so Fancy game. Exploring the new “SkinnyBoy” Bear’s backdoor

By Cluster25 Threat Intel Team

June 3, 2021

This paper presents an analysis of a new and never publicly reported malware internally dubbed as SkinnyBoy.

Based on long-term observations and technical evidences, Cluster25 cyber intelligence research team associates this implant, with medium-high degree of confidence, with the threat actor known as APT28 / Fancy Bear / Pawn Storm.

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