Listen to this Post
For professionals managing Operational Technology (OT) and Industrial Control Systems (ICS), assessing risks can be challenging due to limited resources compared to traditional IT environments. Mike Holcomb’s Industrial Cyber Guide is a critical starting point for securing these systems.
You Should Know:
Key Commands & Tools for OT/ICS Security
1. Network Scanning & Asset Discovery
nmap -sV -O -p 1-1024 <OT_IP_Range> Identify ICS devices
masscan -p1-65535 <OT_IP_Range> --rate=1000 Fast port scanning
2. Protocol Analysis
tshark -i eth0 -Y "modbus || dnp3 || opcua" -w ot_traffic.pcap Capture ICS protocols
python3 -m pip install scapy Manipulate industrial protocol packets
3. Vulnerability Assessment
sudo openvas-start Launch OpenVAS for ICS vulnerabilities
nikto -h <OT_Device_IP> -Plugins "ics" Scan web interfaces
4. Windows ICS Hardening
Disable-WindowsOptionalFeature -Online -FeatureName SMB1Protocol Disable insecure SMB
Set-NetFirewallRule -DisplayGroup "Industrial Protocols" -Enabled True Restrict traffic
5. Logging & Monitoring
journalctl -u <ICS_Service> --no-pager Check systemd logs
zeek -i eth0 -C -s icssigs.zeek Detect anomalies in OT traffic
6. Incident Response in OT
dd if=/dev/sda of=ot_forensic.img bs=4M Acquire disk image
volatility -f ot_forensic.img --profile=Win10x64 pslist Analyze memory
Critical Resources
What Undercode Say
OT/ICS security requires specialized tools, air-gapped testing, and protocol-specific knowledge. Unlike IT, disruptions in OT can have physical consequences. Always:
– Use read-only mode when probing live systems.
– Segment OT networks via firewalls and unidirectional gateways.
– Monitor for unauthorized PLC changes with tools like Tripwire.
Prediction
As OT/ICS converges with IT, attacks like ransomware targeting PLCs and supply chain compromises will rise. Organizations must adopt zero-trust architectures and continuous ICS monitoring.
Expected Output:
- nmap -sV -O -p 1-1024 192.168.1.0/24 - tshark -i eth0 -Y "modbus" -w ot.pcap - Disable-WindowsOptionalFeature -Online -FeatureName SMB1Protocol
References:
Reported By: Mthomasson Getting – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
