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Link: https://lnkd.in/eH9Wg-fK
You Should Know:
1. Network Scanning with Nmap:
- Use Nmap to identify unsecured devices on your network.
- Command: `nmap -sP 192.168.1.0/24` (Scans the entire subnet for active devices)
- Command: `nmap -p 80,443 192.168.1.1` (Scans specific ports on a device)
2. Securing IoT Devices:
- Change default credentials on IoT devices.
- Command: `ssh [email protected]` (SSH into the device and change the password)
- Disable unnecessary services: `sudo systemctl disable
`
3. Monitoring Network Traffic:
- Use Wireshark to monitor network traffic for unusual activity.
- Command: `sudo wireshark` (Launch Wireshark to capture and analyze packets)
4. Endpoint Detection and Response (EDR) Tools:
- Ensure EDR tools are configured to monitor all endpoints, including IoT devices.
- Command: `sudo apt-get install osquery` (Install osquery for endpoint monitoring)
- Query: `SELECT * FROM processes WHERE name LIKE ‘%ransomware%’;` (Check for suspicious processes)
5. Firewall Configuration:
- Use UFW (Uncomplicated Firewall) to restrict access to IoT devices.
- Command: `sudo ufw allow from 192.168.1.0/24 to any port 80` (Allow only local network access to port 80)
- Command: `sudo ufw deny out 443` (Block outgoing traffic on port 443)
6. Regular Updates and Patching:
- Keep all devices and software up to date.
- Command: `sudo apt-get update && sudo apt-get upgrade` (Update and upgrade all packages on Linux)
7. Log Analysis:
- Use `journalctl` to analyze system logs for suspicious activity.
- Command: `journalctl -u sshd` (Check SSH logs for unauthorized access attempts)
8. Backup Strategy:
- Implement a robust backup strategy to mitigate ransomware attacks.
- Command: `rsync -av /home/user /backup/` (Backup user data to a secure location)
What Undercode Say:
In the ever-evolving landscape of cybersecurity, it’s crucial to adopt a holistic approach to defense. The article highlights how threat actors can bypass EDR tools by exploiting unsecured IoT devices, emphasizing the importance of comprehensive network visibility and monitoring. By employing tools like Nmap, Wireshark, and osquery, and following best practices such as regular updates, firewall configuration, and log analysis, organizations can significantly reduce their attack surface. Additionally, a robust backup strategy ensures that even in the event of a successful ransomware attack, data recovery is possible. Always remember, cybersecurity is not just about deploying tools but also about continuous monitoring, proactive defense, and out-of-the-box thinking.
References:
Reported By: Jamie Williams – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
