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The SessionManager IIS backdoor

July 5, 2022

SessionManager has been used against NGOs, government, military and industrial organizations in Africa, South America, Asia, Europe, Russia and the Middle East, starting from at least March 2021. Because of the similar victims, and use of a common OwlProxy variant, ESET believe the malicious IIS module may have been leveraged by the GELSEMIUM threat actor, as part of espionage operations.