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Malware Threats Emerge: Gootloader and New Backdoors Targeting Defense Sector

First seen 23 Nov 2025, 03:36 UTC • •

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ThreatCluster •March 12, 2026 at 13:27 UTC

Recent malware developments include the resurgence of Gootloader, which has been linked to various cyberattacks. Notably, a novel backdoor named SesameOp utilizes OpenAI Assistants API for command and control, while weaponized military documents have introduced an advanced SSH-Tor backdoor targeting the defense sector. These threats highlight ongoing vulnerabilities in software ecosystems and the potential for significant impacts on affected organizations.

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