During a ransomware outbreak, the response team contains the malware, but the payment system stays down far beyond what the business can tolerate. The post-incident review finds that every step in the response plan was followed. What should the information security manager do to prevent a repeat?
Choose one.
The incident response plan hands over to the disaster recovery and continuity plans through predefined, impact-based invocation criteria.
Containment succeeded and the plan was followed, yet the business still suffered. That points to a gap in the plan itself: nothing in it said when a security incident must be escalated into disaster recovery. Alignment means each plan keeps its own job and the link between them is defined. Changing the RTO, copying procedures into the playbook or notifying management are all reasonable-sounding but leave the trigger undefined.
- Locate the failure: the outage lasted past tolerance although the plan was followed.
- Conclude that the plan, not its execution, is missing something: the point at which recovery takes over.
- Prefer the fix that links the plans rather than one that duplicates or bypasses them.
- Check that the chosen fix would actually have started recovery sooner.
Exam tip: Link the incident response plan to the DRP with impact-based triggers; don't merge or duplicate them.
CISM Incident Response Planning, Classification and Testing — the lesson that teaches this.