OT Sentinel is an open-source detection rule library for OT/ICS protocols, providing 29 rules for Wazuh and Sigma platforms. It covers protocols including Modbus (fully lab-validated), DNP3, IEC 104, MQTT, and OPC-UA (logtest-validated but pending hardware validation). The rules are mapped to MITRE ATT&CK for ICS and designed for passive network monitoring in lab or test environments. The project addresses the lack of open-source OT detection rules and offers a free alternative to costly commercial OT security tools. It is intended as a learning and detection engineering accelerator, not a production-ready product. Users are advised to validate and tune rules in their own environments before any production deployment. The repository includes decoders, rules, test scripts, and documentation to support OT security detection engineering.

There is no direct security impact or vulnerability associated with this content. It is a community-driven open-source detection ruleset intended to improve OT/ICS security monitoring capabilities. The project helps security teams detect potential OT protocol attacks by providing detection logic for SIEM/XDR platforms. It does not introduce any new attack vectors or exploits. Instead, it potentially enhances defenders' ability to identify malicious activity in OT environments.

No remediation or patch is required as this is not a vulnerability or exploit. Users interested in OT security detection can consider evaluating and contributing to the OT Sentinel ruleset in lab or test environments. The author advises rigorous testing and tuning before any production deployment to avoid operational risks. This project should be treated as an educational and detection engineering resource rather than a turnkey security solution.