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SesameOp Utilizes OpenAI API for Covert C2 Communication

First seen 2 Dec 2025, 18:33 UTC • •

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ThreatCluster •March 12, 2026 at 13:27 UTC

SesameOp has been identified using the OpenAI Assistants API to facilitate covert communication with command and control (C2) servers. This method allows for stealthy operations, potentially impacting various organizations targeted by this cyber threat. The technique leverages advanced AI capabilities to evade detection.

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