Enumeration is critical when working with ICS (Industrial Control Systems) networks. It helps in:
– Mapping ICS networks
– Finding exposed services
– Identifying misconfigurations
– Testing OT (Operational Technology) defenses
– Preparing for deeper security assessments
Zakhar Bernhardt has updated the Enumeration Pentest Lab inside Labshock, focusing on core tools for scanning ICS networks.
🔥 What’s in the lab?
✅ Practical scanning tasks
✅ Fast scans with `netcat`
✅ Discovery with `nmap`
✅ Service and system enumeration
✅ TCP/UDP scan examples
✅ New Pentest Fury scans
🔗 OT SIEM Leveling Guide (1-60): https://www.linkedin.com/pulse/ot-siem-leveling-guide-0-60-zakhar-bernhardt-7fczf
You Should Know:
1. Basic Port Scanning with Nmap
nmap -sS -Pn -T4 <target_IP> Stealth SYN scan nmap -sU -p 1-1024 <target_IP> UDP scan nmap -A -O -sV <target_IP> Aggressive scan with OS detection
2. Fast Scanning with Netcat
nc -zv <target_IP> 1-1000 Check open TCP ports
3. ICS-Specific Scanning (Minimal Impact)
nmap --script=modbus-discover.nse <target_IP> Modbus protocol detection nmap -p 502 --script=s7-info.nse <target_IP> Siemens S7 PLC scan
4. Using Pentest Fury for ICS Scans
(Assuming it’s a custom tool)
pentest-fury --ics-scan --target <IP> --ports 502,44818,47808
5. Defensive Measures (Detecting Scans)
tcpdump -i eth0 'tcp[bash] & (tcp-syn) != 0 and not src your_IP' Detect SYN scans
What Undercode Say
Port scanning in ICS environments requires caution to avoid disrupting critical systems. Always:
– Use low-intensity scans (-T2 in Nmap).
– Avoid UDP flooding (can crash PLCs).
– Prefer whitelisted testing hours.
– Log all scans for compliance.
For deeper ICS security:
Check for default credentials in HMI/PLC hydra -l admin -P rockyou.txt <target_IP> http-post-form "/login.php:user=^USER^&pass=^PASS^:F=incorrect"
Expected Output:
Starting Nmap 7.92 ( https://nmap.org ) Nmap scan report for PLC_Device (192.168.1.10) PORT STATE SERVICE 502/tcp open modbus
Prediction
ICS security will increasingly rely on AI-driven anomaly detection to distinguish between legitimate scans and malicious reconnaissance. Future tools may automate safe scanning profiles to prevent accidental disruptions.
Expected Output:
[+] ICS Scan Completed: 3 Critical Ports Found [+] Recommendations: - Disable unused Modbus/TCP services - Enable MAC whitelisting
References:
Reported By: Zakharb Sec – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
