AI as tradecraft: How threat actors operationalize AI - Microsoft

November 3, 2025 SesameOp: Novel backdoor uses OpenAI Assistants API for command and control Microsoft Incident Response – Detection and Response Team (DART) researchers uncovered a new backdoor that is notable for its novel use of the OpenAI Assistants Application Programming Interface (API) as a mechanism for command-and-control (C2) communications.