| name | ics-ot-overview |
| description | ICS / OT attack category — Modbus, BACnet, S7Comm, DNP3. Routing skill: fingerprint the industrial protocol by port + Wireshark dissector, then load the matching sub-skill. SAFETY-CRITICAL: always confirm written scope before any write/control class action. |
| allowed-tools | Bash Read Write |
| metadata | {"when_to_use":"ics ot industrial scada plc rtu modbus bacnet s7 siemens dnp3 hmi mes opc opc-ua profinet ethernet/ip cip","subdomain":"ics-ot","tags":"ics, ot, scada, industrial","mitre_attack":"T0855, T0836, T0846, T0816"} |
Industrial Control Systems / OT Category
This is a routing skill for industrial protocol engagements. Identify the protocol by port + wire format, then load the matching sub-skill.
SAFETY FIRST
Writes to ICS/OT devices can move physical actuators — open valves, trip breakers, freeze pumps, override safety setpoints. Confirm written scope authorization for any write/control class operation. Read-only enumeration is generally safe. If unsure, default to read-only.
Protocol routing
| Protocol | TCP/UDP Port | Sub-skill | Wire fingerprint |
|---|
| Modbus TCP | TCP 502 | modbus | MBAP header, function codes 1-127 |
| BACnet/IP | UDP 47808 | bacnet | APDU PDU types 0-15, Who-Is/I-Am |
| Siemens S7Comm | TCP 102 | s7comm | ISO-on-TCP (RFC 1006) + S7 protocol IDs |
| DNP3 | TCP 20000 | dnp3 | Start bytes 0x05 0x64, link layer |
| EtherNet/IP + CIP | TCP 44818, UDP 2222 | (use enumeration; CVE-driven exploits) | ENIP encapsulation header |
| PROFINET RT | UDP 34962-34964 | (use enumeration) | EtherType 0x8892 (L2) |
| OPC UA | TCP 4840 | (use enumeration) | OPC UA Binary protocol |
Quick fingerprint sweep
nmap -sV -p 102,502,20000,44818,4840 --script="*ics*,*scada*,modbus-discover,s7-info,dnp3-info,bacnet-info,enip-info" 10.0.0.0/24
Useful tooling
| Tool | Use |
|---|
pymodbus, mbtget | Modbus client |
bacpypes, bacnet-stack | BACnet client |
snap7, python-snap7 | S7Comm client |
opendnp3, dnp3-toolkit | DNP3 master |
cip-py, pylogix | EtherNet/IP / CIP (Allen-Bradley) |
python-opcua / opcua-asyncio | OPC UA |
ISF (Industrial Security Framework) | Mass enumeration + exploit framework |
PLCinject | Siemens S7 logic injection |
Defender baseline (useful for triage)
ICS-CERT advisories (https://www.cisa.gov/uscert/ics/advisories), Dragos Threat Intel Briefs, Nozomi / Claroty / Tenable.ot for telemetry. Understanding what defenders see helps you stay below detection thresholds.
