The Six Critical Phases Of Incident Response In ICS/OT And IT

The steps are the same in industrial (ICS/OT) and traditional IT environments. Even though the incidents might look very different between the two. If you are new to these, or need a refresher, here they are in all their glory!

1. Preparation

The most important phase
Develop a simple IR Process
Identify your initial IR team
Train your initial IR team members
Run some Tabletop Exercises for practice
Prepare for an incident BEFORE it happens!!!

2. Identification

Deploy network and host security monitoring
Review alerts for suspicious activity to investigate
Do not forget to ask for help when necessary – you aren’t alone!
In ICS/OT, get the right people involved – engineers, technicians, operators, etc.

3. Containment

Prevent further damage
Disconnect systems as necessary
Eliminate the attackers’ access to your systems
Determine the next steps which are right for your company

4. Eradication

Disconnect from the Internet and reset all passwords (at a minimum)
Take the steps necessary to remove attackers completely from the environment
Ensure all attack vectors, C2 Channels and other paths into the network are eliminated

5. Recovery

Ultimately why we have jobs…
Getting the business back up and running
Restore data from known good backups (if they exist)
Rebuild systems/apps as necessary to ensure free of compromise

6. Lessons Learned

Identify opportunities for improvement
Do not forget to highlight what went well
Be thankful for the Incident Response Team members

Practice Verified Codes and Commands:

Preparation Phase:
```
</li>
</ul>

<h1>Create a backup of critical systems</h1>

tar -czvf backup.tar.gz /path/to/critical/data
```
- Identification Phase:
```
</li>
</ul>

<h1>Monitor network traffic using tcpdump</h1>

tcpdump -i eth0 -w network_traffic.pcap
```
  - Containment Phase:
```
</li>
</ul>

<h1>Block an IP address using iptables</h1>

iptables -A INPUT -s 192.168.1.100 -j DROP
```
    - Eradication Phase:
```
</li>
</ul>

<h1>Change all user passwords</h1>

for user in $(cut -d: -f1 /etc/passwd); do echo "$user:newpassword" | chpasswd; done
```
      - Recovery Phase:
        </li> </ul> <h1>Restore data from backup</h1> tar -xzvf backup.tar.gz -C /path/to/restore
        
        Lessons Learned Phase:
        </li> </ul> <h1>Generate a report of all commands executed during the incident</h1> history > incident_report.txt
        
        What Undercode Say:
        
        Incident response is a critical aspect of cybersecurity, whether in ICS/OT or traditional IT environments. The six phases—Preparation, Identification, Containment, Eradication, Recovery, and Lessons Learned—provide a structured approach to managing and mitigating incidents effectively. Preparation is the cornerstone, ensuring that teams are ready to respond swiftly and efficiently. Identification involves deploying monitoring tools and reviewing alerts, while Containment focuses on preventing further damage. Eradication requires removing all traces of the attacker, and Recovery ensures business continuity. Finally, Lessons Learned helps in refining the incident response process for future incidents.
        
        In ICS/OT environments, involving engineering teams is crucial due to the unique nature of industrial systems. Commands like `tcpdump` for network monitoring, `iptables` for blocking malicious IPs, and `tar` for data backup and restoration are essential tools in an incident responder’s arsenal. Regularly updating and testing incident response plans, along with continuous training, can significantly enhance an organization’s resilience against cyber threats.
        
        For further reading on incident response in ICS/OT, visit ICS-CERT and NIST SP 800-82. These resources provide comprehensive guidelines and best practices for securing industrial control systems.
        
        References:
        
        Reported By: Mikeholcomb Six – Hackers Feeds
        Extra Hub: Undercode MoN
        Basic Verification ✅

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