SMB Tech & Cybersecurity Leadership Newsletter

SMB Tech & Cybersecurity Leadership Newsletter

SesameOp: The New Backdoor Abusing OpenAI API for C2

Microsoft finds malware using the Assistants API for stealthy command and control. Learn how this espionage tactic works and how to mitigate it.

Christophe Foulon 📓's avatar
Christophe Foulon 📓
Nov 04, 2025
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Beyond the Hype: How the “SesameOp” Backdoor Turns OpenAI into a Stealthy C2 Channel (And How to Fight Back)

In the cybersecurity world, we often talk about attackers “living off the land”—using a vic…

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