Getting Started In ICS/OT Cyber Security: A Free 25-Hour Course

https://www.youtube.com/@utilsec

Course Sections Overview

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 (100+ to test knowledge)

You Should Know: Essential ICS/OT Cybersecurity Commands & Practices

1. Network Security & Monitoring (Linux/Windows)

Scanning Industrial Networks with Nmap

nmap -sV -Pn -p 1-1024 --script vulners <OT_IP_Range>

Detecting Modbus Devices

python3 modbusdetect.py -i <Target_IP> -p 502

Windows Firewall Rule for OT Traffic

New-NetFirewallRule -DisplayName "Block Unauthorized ICS Traffic" -Direction Inbound -Protocol TCP -LocalPort 502,44818 -Action Block

2. Asset Discovery & Inventory

Using SNMP for Device Enumeration

snmpwalk -v2c -c public <OT_Device_IP> .1.3.6.1.2.1.1.1

Extracting ICS Device Info with Metasploit

use auxiliary/scanner/scada/modbusdetect
set RHOSTS <Target_IP>
run

3. Threat Detection & Response

Log Analysis with Grep (Linux)

grep -i "unauthorized access" /var/log/secure

Detecting Abnormal Traffic with TCPDump

tcpdump -i eth0 'port 502 or port 44818' -w ot_traffic.pcap

4. Secure ICS Protocols

Testing PLC Security with PLCScan
```
python plcscan.py -d <Device_IP>
```

Hardening Siemens S7 Comm

s7tool.py --secure-mode enable --ip <PLC_IP>

What Undercode Say

Industrial Control Systems (ICS) and Operational Technology (OT) security is critical due to increasing cyber-physical threats. This course provides hands-on knowledge for securing critical infrastructure. Key takeaways:
– Network segmentation is mandatory (use VLANs & firewalls).
– Continuous monitoring of ICS protocols (Modbus, DNP3, S7).
– Asset inventory is the first step in OT security.
– Incident response must be tailored for ICS environments (unlike IT).

Expected Output:

By applying these commands and best practices, security professionals can better defend power plants, water systems, and manufacturing networks from cyber threats.

Prediction

As OT/ICS attacks rise, demand for skilled professionals will surge. Governments will enforce stricter ICS security regulations, making this course a must for future cybersecurity experts.