ThreatCluster

SesameOp Utilizes OpenAI API for Covert Communication with C2 Servers

First seen 4 Nov 2025, 16:06 UTC • •40

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ThreatCluster •March 12, 2026 at 13:27 UTC

SesameOp is employing the OpenAI Assistants API to facilitate covert communication with command and control (C2) servers. This method allows for stealthy data exchange, potentially impacting organizations targeted by this malware. The use of advanced AI technology in cyber operations raises significant implications for cybersecurity defenses.

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3 entities, 2 inferred relationships (STIX 2.1).

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Technique (2)

Data Breach
Malware

Tool (1)

OpenAI Assistants API

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OpenAI Assistants API related to Data Breach
OpenAI Assistants API related to Malware

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