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Mike Holcomb offers a FREE 25-hour YouTube course on OT/ICS (Operational Technology/Industrial Control Systems) Cybersecurity, with over 70,000+ views and 1,000+ live participants. The course covers essential topics for securing industrial control systems, bridging IT and OT security gaps.
https://www.youtube.com/@utilsec
📩 Newsletter: Join 5,300+ subscribers
Course Sections:
1. to ICS/OT Cyber Security
2. ICS/OT Cyber Security Overview
3. Control Systems & Protocols
4. Secure Network Architecture
5. Asset Registers & Control Systems Inventory
6. Threat & Vulnerability Management
7. OSINT for Industrial Controls
8. Incident Detection & Response
9. Industry Standards & Regulations
10. to ICS/OT Penetration Testing
11. Review Questions (200+)
You Should Know:
1. Essential OT/ICS Security Commands & Tools
Network Scanning (Nmap for OT Systems)
nmap -Pn -sT --script=modbus-discover.nse -p 502 <OT_IP_Range>
– Scans for Modbus (port 502) devices in an OT network.
Industrial Protocol Analysis (Wireshark Filters)
Filter for Modbus Traffic modbus Filter for DNP3 Traffic dnp3
Asset Discovery (OWASP Nettacker for ICS)
python nettacker.py -i <OT_IP> -m industrial_scan
Vulnerability Scanning (Metasploit for ICS)
use auxiliary/scanner/scada/modbusdetect set RHOSTS <OT_IP> run
2. Securing ICS/OT Networks
Firewall Rules (Linux iptables for OT Traffic)
Allow only Modbus traffic from trusted IP iptables -A INPUT -p tcp --dport 502 -s <Trusted_IP> -j ACCEPT iptables -A INPUT -p tcp --dport 502 -j DROP
Log Monitoring (Syslog for OT Devices)
Forward OT device logs to SIEM logger -p local6.warning "ICS Device Alert: Unauthorized Modbus Access"
Password Hardening (John the Ripper for Default ICS Passwords)
john --wordlist=common_ics_passwords.txt hashes.txt
3. Incident Response in ICS/OT
Detecting Anomalies (Zeek/Bro for OT Traffic)
zeek -i eth0 -C -s modbus.zeek
Memory Forensics (Volatility for ICS Malware)
vol.py -f ICS_Memory_Dump.raw windows.malfind
Isolating Compromised Devices (Linux Network Isolation)
ifconfig eth0 down
What Undercode Say:
OT/ICS security is critical for industrial infrastructure. Unlike IT systems, OT networks require specialized tools (like Modbus scanners, DNP3 analyzers) and air-gapped security policies. Penetration testing in ICS must be non-disruptive—always test in a lab environment first.
🔹 Key Takeaways:
✔ Use Nmap, Wireshark, Metasploit modules for ICS recon.
✔ Implement strict firewall policies for OT protocols (Modbus, DNP3, S7).
✔ Monitor unusual traffic patterns (e.g., PLC reprogramming attempts).
✔ Never run exploits on live OT systems without approval.
🔗 Further Learning:
Prediction:
As OT/ICS attacks rise, expect more ransomware targeting SCADA systems (like Colonial Pipeline 2.0). Companies will mandate air-gapped backups and AI-driven anomaly detection for critical infrastructure.
Expected Output:
A structured, actionable guide on OT/ICS cybersecurity with real commands, tools, and best practices.
IT/Security Reporter URL:
Reported By: Https: – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
