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By Mike Holcomb
Enhance your Industrial Control Systems (ICS) and Operational Technology (OT) cybersecurity skills with these free Open-Source Intelligence (OSINT) questions. Whether you’re an auditor, security professional, or a learner in the field, these questions will help you evaluate your understanding of critical infrastructure security.
You Should Know:
1. Essential OSINT Tools for ICS/OT Security
- Shodan (
shodan.io): Search for exposed ICS/OT devices.shodan search "port:502" --limit 10 Find Modbus devices
- Censys (
censys.io): Discover vulnerable industrial systems.censys search "services.service_name: Siemens S7"
- Maltego (
maltego.com): Map network relationships in ICS environments.
2. Key Linux Commands for Network Recon
- Nmap for ICS Device Scanning
nmap -sV -p 80,443,502,102 --script vulners <target_IP>
- Metasploit for ICS Exploitation Testing
msfconsole -q -x "use auxiliary/scanner/scada/modbusdetect; set RHOSTS <target_IP>; run"
3. Windows Commands for OT Security Audits
- Detecting Suspicious Processes
Get-Process | Where-Object { $_.CPU -gt 90 } | Format-Table -AutoSize - Checking Open Ports (PowerShell)
Test-NetConnection -ComputerName <target_IP> -Port 502
4. Practical ICS/OT Security Steps
- Identify Exposed Devices: Use Shodan/Censys to find internet-facing PLCs/RTUs.
2. Assess Vulnerabilities: Run `nmap` with ICS-specific scripts.
- Simulate Attacks: Use Metasploit modules for protocol fuzzing (e.g., Modbus, DNP3).
4. Monitor Logs:
journalctl -u ssh --no-pager | grep "Failed password" Linux
Get-WinEvent -FilterHashtable @{LogName='Security'; ID=4625} Windows
What Undercode Say
OSINT is a critical skill for ICS/OT security. Always verify findings legally and ethically. Strengthen defenses by:
– Segmenting OT networks (iptables, firewalld).
– Disabling unused industrial protocols (systemctl stop modbus.service).
– Monitoring for abnormal traffic (tcpdump -i eth0 'port 502' -w modbus.pcap).
Expected Output:
- A list of exposed ICS devices from Shodan.
- Vulnerability assessment report from Nmap.
- Attack simulation logs from Metasploit.
For further reading, check:
References:
Reported By: Chidambaram Narayanan – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
