Individual skill
detecting-modbus-command-injection-attacks
Detect command injection against Modbus TCP/RTU in ICS/SCADA environments by monitoring unauthorized writes, anomalous function codes, malformed frames, and deviations from communication baselines using ICS-aware IDS and deep packet inspection. Use when deploying IDS for Modbus OT networks, investigating unauthorized PLC register/coil changes, or responding to FrostyGoop-style Modbus attacks.
skills/detecting-modbus-command-injection-attacks/SKILL.md
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- Last checked
- Nov 9, 2026
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- Repository last updated
- Aug 31, 2026
- License
- Apache-2.0
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- ai-agents Repository topic
- claude-code Repository topic
- cybersecurity Repository topic
- incident-response Repository topic
- mitre-attack Repository topic
- penetration-testing Repository topic
- red-team Repository topic
- security Repository topic
- cloud-security Repository topic
- malware-analysis Repository topic
- ot-security Declared skill tag
- ics Declared skill tag
- modbus Declared skill tag
- command-injection Declared skill tag
- protocol-analysis Declared skill tag
- ids Declared skill tag
- scada Declared skill tag
- threat-detection Declared skill tag
- security Derived category
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LICENSEasset · 11,255 bytesSKILL.mdcore · 20,590 bytesSKILL.mdcore · 20,590 bytesSKILL.mdcore · 20,590 bytesSKILL.mdcore · 20,590 bytesSKILL.mdcore · 20,590 bytesSKILL.mdcore · 20,590 bytesSKILL.mdcore · 20,590 bytesSKILL.mdcore · 20,590 bytesSKILL.mdcore · 20,590 bytesSKILL.mdcore · 20,590 bytesreferences/api-reference.mddoc · 1,636 bytesscripts/agent.pyruns · 5,239 bytes
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# 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 DNP3), for general IT network intrusion detection, or for Modbus device configuration (see performing-ot-vulnerability-scanning-safely).
## Prerequisites
