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The best course of action for an information security manager when a threat intelligence report indicates a large number of ransomware attacks targeting the industry is to assess the risk to the organization. This means evaluating the likelihood and impact of a potential ransomware attack on the organization’s assets, operations, and reputation, based on the current threat landscape, the organization’s security posture, and the effectiveness of the existing security controls. A risk assessment can help the information security manager prioritize the most critical assets and processes, identify the gaps and weaknesses in the security architecture, and determine the appropriate risk response strategies, such as avoidance, mitigation, transfer, or acceptance. A risk assessment can also provide a business case for requesting additional resources or support from senior management to improve the organization’s security resilience and readiness. The other options are not the best course of action because they are either too reactive or too narrow in scope. Increasing the frequency of system backups (A) is a good practice to ensure data availability and recovery in case of a ransomware attack, but it does not address the prevention or detection of the attack, nor does it consider the potential data breach or extortion that may accompany the attack. Reviewing the mitigating security controls (B) is a part of the risk assessment process, but it is not sufficient by itself. The information security manager should also consider the threat sources, the vulnerabilities, the impact, and the risk appetite of the organization. Notifying staff members of the threat © is a useful awareness and education measure, but it should be done after the risk assessment and in conjunction with other security policies and procedures. Staff members should be informed of the potential risks, the indicators of compromise, the reporting mechanisms, and the best practices to avoid or respond to a ransomware attack. References = CISM Review Manual 2022, pages 77-78, 81-82, 316; CISM Item Development Guide 2022, page 9; #StopRansomware Guide | CISA; [The Human Consequences of Ransomware Attacks - ISACA]; [Ransomware Response, Safeguards and Countermeasures - ISACA]

Risk assessment is the BEST input to a business case for a technical solution to address potential system vulnerabilities, because it helps to identify and prioritize the most critical risks that the solution should mitigate or reduce. Risk assessment also helps to evaluate the costs and benefits of the solution in terms of reducing the likelihood and impact of potential threats and incidents.

References =

CISM Review Manual, 16th Edition, ISACA, 2020, p. 47: “Risk assessment is the process of identifying and analyzing information security risks and determining their potential impact on the enterprise’s business objectives.”

CISM Review Manual, 16th Edition, ISACA, 2020, p. 48: “Risk assessment provides input to the business case for information security investments by identifying and prioritizing the most critical risks that need to be addressed and evaluating the costs and benefits of the proposed solutions.”

 The primary goal of a post-incident review is to identify areas for improvement in the incident handling process. The focus is on evaluating the effectiveness of incident response procedures, technical controls, communication channels, coordination among teams, documentation, and any other relevant aspects. The post-incident review should also provide recommendations for corrective actions, preventive measures, and lessons learned that can help reduce the likelihood and impact of future incidents12. References = CISM Review Manual 15th Edition, page 1251; CISM Item Development Guide, page 72

Capacity planning is the process of estimating and allocating the required resources (such as CPU, memory, disk space, bandwidth, etc.) to meet the current and future demands of the information systems and applications. Capacity planning would prevent application failures arising from insufficient hardware resources, as it would ensure that the applications have enough resources to function properly and efficiently, and avoid performance degradation, errors, or crashes.

References = CISM Review Manual 2022, page 3081; CISM Exam Content Outline, Domain 4, Knowledge Statement 4.92; What is Capacity Planning? Definition and Examples