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Over 60,000 people have watched Mike Holcomb’s free 25-hour YouTube course on OT/ICS Cybersecurity, with over 1,000 participants attending live sessions. The course has received outstanding feedback for its depth, practical insights, and unique industrial perspective.
Course Sections Overview
1. to Getting Started in 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 (100+ to test knowledge)
🔗 Full Course Available Here: youtube.com/@utilsec
You Should Know: Essential ICS/OT Cybersecurity Commands & Practices
1. Network Security & Monitoring
- Scanning Industrial Networks with Nmap
nmap -sS -Pn -T4 -p- --script vuln <OT_Device_IP>
- Detecting Unauthorized Modbus Traffic
tcpdump -i eth0 'port 502' -w modbus_traffic.pcap
2. Asset Discovery & Inventory
- Using `arp-scan` for OT Device Discovery
arp-scan --localnet --interface=eth0
- Querying SNMP Devices
snmpwalk -v2c -c public <OT_Device_IP> 1.3.6.1.2.1.1.1
3. Threat Detection in ICS Environments
- Log Analysis with `grep` for Suspicious Activity
grep -i "unauthorized access" /var/log/syslog
- Detecting PLC Password Cracking Attempts
journalctl -u plc_service | grep "Failed login"
4. Secure Remote Access (SSH & Firewalls)
- Hardening SSH for OT Systems
sudo nano /etc/ssh/sshd_config Set: PermitRootLogin no, PasswordAuthentication no
- Blocking Unauthorized IPs with `iptables`
iptables -A INPUT -s <Malicious_IP> -j DROP
5. Incident Response in ICS/OT
- Memory Forensics with `Volatility`
volatility -f memory_dump.raw pslist
- Extracting Network Artifacts from PCAPs
tshark -r incident.pcap -Y "modbus" -T fields -e modbus.func_code
What Undercode Say
Industrial Control Systems (ICS) and Operational Technology (OT) security require specialized knowledge due to legacy systems, proprietary protocols, and real-time operational constraints. Key takeaways:
– Network Segmentation is critical (iptables, VLANs).
– Passive Monitoring (tcpdump, Wireshark) helps detect anomalies.
– Asset Management (arp-scan, SNMP) prevents blind spots.
– Incident Response must prioritize system availability over immediate patches.
For hands-on practice, always test in a lab environment before deploying in production.
🔗 Enhance Your Skills: youtube.com/@utilsec
Expected Output:
A structured cybersecurity learning path with actionable commands for ICS/OT professionals.
References:
Reported By: Mikeholcomb A – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
