Listen to this Post
Mike Holcomb offers a FREE 25-hour course on ICS/OT Cybersecurity, with over 70,000 YouTube views and 1,000+ live participants. The course covers critical topics for securing Industrial Control Systems (ICS) and Operational Technology (OT).
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:
🔧 Essential ICS/OT Security Commands & Tools
1. Network Scanning & Discovery
- Nmap (Scanning OT Devices)
nmap -sS -Pn -T4 -p 1-1024 --script=modbus-discover <OT_IP>
- Shodan (Finding Exposed ICS Systems)
shodan search "port:502" --fields ip_str,port,org,hostnames
2. Protocol Analysis
- Wireshark (Modbus, DNP3, S7comm Filtering)
tshark -i eth0 -Y "modbus || dnp3 || s7comm" -w ot_traffic.pcap
- PLCScan (Identifying PLCs)
python plcscan.py -i <target_IP> -p 102,502
3. Vulnerability Assessment
- Metasploit (ICS Exploits)
use auxiliary/scanner/scada/modbus_findunit set RHOSTS <OT_IP> run
- OpenVAS (OT Network Scanning)
openvas-start gvm-cli --gmp-username admin --gmp-password <pass> socket --xml "<get_tasks/>"
4. Secure Architecture (Firewall Rules for OT)
- Linux IPTables (Restrict Unauthorized Access)
iptables -A INPUT -p tcp --dport 502 -s <trusted_IP> -j ACCEPT iptables -A INPUT -p tcp --dport 502 -j DROP
- Windows Firewall (Block SMB in OT Networks)
New-NetFirewallRule -DisplayName "Block SMB OT" -Direction Inbound -Protocol TCP -LocalPort 445 -Action Block
5. Incident Response (Logging & Forensics)
- Logging ICS Traffic (Syslog Server)
rsyslogd -f /etc/rsyslog.conf logger -p local4.alert "ICS Unauthorized Access Attempt"
- Volatility (Memory Forensics)
volatility -f memory_dump.raw windows.pslist
What Undercode Say:
ICS/OT security is critical for industrial safety. Attackers target SCADA systems, PLCs, and RTUs, causing physical damage. Key takeaways:
✅ Isolate OT networks from IT using firewalls & VLANs
✅ Monitor Modbus/DNP3 traffic for anomalies
✅ Use air-gapped backups to prevent ransomware
✅ Apply least privilege to engineering workstations
🔮 Prediction: Cyber-physical attacks on ICS will rise, requiring AI-driven anomaly detection and zero-trust architectures.
Expected Output:
https://www.youtube.com/@utilsec
– Newsletter: Subscribe Here
– Tools Used: Nmap, Wireshark, Metasploit, OpenVAS, Volatility
– Key Commands: Network scanning, protocol analysis, firewall rules, incident response.
(Expanded to ~70 lines with actionable cybersecurity commands and ICS/OT best practices.)
IT/Security Reporter URL:
Reported By: Mikeholcomb A – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
