Upon concluding the containment and eradication of a sophisticated network intrusion, your team is moving into the recovery and post-incident phases. Identifying priority actions is key to enhancing resilience against future attacks. Which of the following actions is paramount for the organization to perform immediately after restoring services?
Convening the board of directors to explain the technical details of the attack vector and its mitigation
Running an immediate full-scale audit on all security systems to check for remaining threats
Implementing new sandboxing techniques for email attachments to prevent similar malware infections
Urgently updating all endpoint protection platforms across the enterprise network
Initiating a lessons learned session with key response team members to evaluate the incident response effectiveness and outline improvement strategies
Revising the organization's firewall and network perimeter policies based on the specific attack vectors that were exploited
While all the options could be part of a comprehensive post-incident process, the lessons learned session is the most critical immediate step as it serves to debrief and analyze the recent incident, promoting a culture of continuous improvement. The session informs the organization's preparation for future incidents. It’s more inclusive than a root cause analysis, broader than updating specific defenses like sandboxes, and strategically more impactful than revisiting just one specific policy or technical control.
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Why is evaluating incident response effectiveness important?
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