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Introduction
Operational Technology (OT) and Industrial Control Systems (ICS) cybersecurity is a critical field as industries increasingly digitize their infrastructure. Mike Holcomb’s free 25-hour YouTube course provides foundational knowledge, hands-on techniques, and real-world insights to secure these environments. With over 80,000 viewers and 1,500 live participants, this course is a must for IT professionals transitioning into OT security.
Learning Objectives
- Understand core principles of OT/ICS cybersecurity.
- Learn secure network architecture for industrial environments.
- Gain hands-on skills in threat detection, incident response, and penetration testing.
You Should Know
1. Introduction to ICS/OT Cybersecurity
🔗 Course Link: https://lnkd.in/eif9fkVg
Key Commands & Concepts:
– `nmap -sV -Pn
– `Wireshark` – Analyze industrial protocols like Modbus, DNP3, and PROFINET.
Step-by-Step Guide:
1. Install Nmap/Wireshark.
- Run a passive scan to avoid disrupting OT systems.
3. Filter Wireshark captures for industrial protocols.
2. Secure Network Architecture for ICS/OT
Key Commands & Configurations:
- Firewall Rule (Windows):
New-NetFirewallRule -DisplayName "Block Unauthorized ICS Traffic" -Direction Inbound -Protocol TCP -LocalPort 502 -Action Block
- Linux IPTables Rule:
iptables -A INPUT -p tcp --dport 502 -j DROP
Step-by-Step Guide:
- Identify critical ICS ports (e.g., 502 for Modbus).
- Implement strict firewall policies to block unauthorized access.
3. Asset Inventory & Threat Management
Key Tools & Commands:
– `Nessus Scan` – Detect vulnerabilities in OT devices.
– `s7scan` – Enumerate Siemens S7 PLCs:
python3 s7scan.py -i <PLC_IP_Range>
Step-by-Step Guide:
1. Deploy passive asset discovery tools.
2. Prioritize patching critical vulnerabilities.
4. OSINT for Industrial Controls
Key Tools:
– `Shodan` – Search exposed ICS devices:
shodan search port:502 "Modbus"
– `Censys` – Identify misconfigured industrial systems.
Step-by-Step Guide:
1. Use Shodan filters to find exposed PLCs.
2. Report findings to asset owners for remediation.
5. Incident Detection & Response
Key Commands:
– `Zeek (Bro) for OT Traffic Analysis`
zeek -i eth0 -C ot-traffic.log
– `Splunk Query for Anomalies`
index=ics sourcetype=modbus | stats count by src_ip
Step-by-Step Guide:
1. Deploy network monitoring tools.
2. Set alerts for abnormal traffic patterns.
6. ICS/OT Penetration Testing
Key Tools:
– `Metasploit Modbus Module`
use auxiliary/scanner/scada/modbusdetect
– `PLCBlaster` – Simulate PLC malware.
Step-by-Step Guide:
1. Conduct authorized penetration tests.
2. Document findings for hardening measures.
What Undercode Say
- Key Takeaway 1: OT security requires a blend of IT knowledge and industrial process understanding.
- Key Takeaway 2: Passive scanning and strict access controls are critical to avoid disrupting operations.
Analysis:
The convergence of IT and OT demands specialized training like Holcomb’s course. As industries adopt IIoT, attackers increasingly target ICS systems. Professionals must prioritize secure architecture, continuous monitoring, and incident response preparedness.
Prediction
By 2026, OT cyberattacks will surge as ransomware groups pivot to critical infrastructure. Organizations investing in ICS security training today will mitigate future breaches.
🔗 Enroll Now: https://lnkd.in/eif9fkVg
📩 Subscribe for Updates: https://lnkd.in/ePTx-Rfw
🎯Let’s Practice For Free:
IT/Security Reporter URL:
Reported By: Mikeholcomb A – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
