1. The first step involves pinpointing the origin of the threat. This may require analyzing system logs, application logs, and other data sources to detect malicious activity.

2. Once the threat source is identified, it’s critical to isolate the compromised systems to prevent lateral movement or further damage. This can include disconnecting them from the network or placing them in quarantine.

3. With the affected systems isolated, the next priority is to neutralize the malicious activity. Actions may include:
– Removing malware
– Changing compromised passwords
– Updating and patching vulnerable software

4. Assess the Scope of the Breach 
After containment, it’s essential to evaluate the impact. Determine which systems were affected, what data was compromised, and whether any sensitive information was exposed.

5. Prevent Future Attacks
The final step is to analyze the root cause of the incident. Identifying the vulnerabilities exploited during the attack enables you to implement corrective actions and strengthen your overall security posture to prevent recurrence.