Detecting Modbus Command Injection Attacks When to Use - When deploying intrusion detection for environments using Modbus TCP (port 502) or Modbus RTU - When investigating suspected unauthorized modifications to PLC registers or coils - When building detection analytics for OT SOC monitoring Modbus-heavy environments - When responding to FrostyGoop-style attacks that leverage Modbus TCP for operational impact - When performing baseline validation after a suspected compromise of a Modbus master Do not use for detecting attacks on non-Modbus protocols (see detecting-dnp3-protocol-anomalies for…