= After a ransomware incident, the most important concern for the information security manager is to identify the root cause of the incident and prevent it from happening again. The root cause analysis (RCA) is a systematic process of finding and eliminating the underlying factors that led to the incident, such as vulnerabilities, misconfigurations, human errors, or malicious actions. Without performing a RCA, the organization may not be able to address the root cause and may face the same or similar incidents in the future, which could result in more damage, costs, and reputational loss. Therefore, the information security manager should prioritize the RCA over other concerns, such as meeting the SLA, RTO, or notification requirements, which are important but secondary to the RCA.
References = CISM Review Manual 15th Edition, page 254-2551; CISM Review Questions, Answers & Explanations Database - 12 Month Subscription, QID 4202