What is incident response and how to plan for it?

· Category: Cybersecurity

Short answer

Incident response is the organized approach to addressing and managing the aftermath of a security breach. A well-documented plan minimizes damage and recovery time.

Steps

  1. Preparation: Build an IR team, define roles, acquire tools, and establish communication channels.

  2. Identification: Detect and confirm incidents through monitoring, alerts, and user reports. Classify severity.

  3. Containment: Isolate affected systems to prevent spread. Preserve evidence for forensics.

  4. Eradication: Remove malware, close vulnerabilities, and eliminate attacker access.

  5. Recovery: Restore systems from clean backups, verify integrity, and return to normal operations.

  6. Lessons learned: Conduct a post-incident review. Update policies, controls, and the IR plan.

Tips

  • Practice with tabletop exercises regularly.
  • Pre-negotiate contracts with external forensics firms.
  • Maintain immutable backups that attackers cannot encrypt.

Common issues

  • Delayed containment due to lack of decision-making authority.
  • Destroying evidence during rushed remediation.
  • Poor internal communication causing public relations missteps.