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post-incident review of an information security incident is a process that aims to identify the root causes, contributing factors, and lessons learned from the incident, and to implement corrective and preventive actions to avoid or mitigate similar incidents in the future. The primary objective of a post-incident review is to prevent recurrence, as it helps to improve the security posture, awareness, and resilience of the organization. Preventing recurrence also helps to reduce the impact and cost of future incidents, as well as to enhance the reputation and trust of the organization. Updating the risk profile, minimizing impact, and determining the impact are not the primary objectives of a post-incident review, although they may be part of its outcomes or outputs. References = CISM Review Manual, 16th Edition, page 1011

 A business-aligned information security program is one that supports the organization’s business objectives and aligns the information security strategy with the business functions. A business impact analysis (BIA) is a process that identifies the critical business processes, assets, and functions of an organization, and assesses their potential impact in the event of a disruption or loss. A BIA helps to prioritize the information security requirements and controls that are needed to protect the organization’s critical assets and functions from various threats and risks. Therefore, a BIA is one of the most useful sources when planning a business-aligned information security program. References = CISM Review Manual 15th Edition, page 254; CISM Review Questions, Answers & Explanations Database - 12 Month Subscription, QID 229.The most useful source when planning a business-aligned information security program is a Business Impact Analysis (BIA). A BIA is a process of identifying and evaluating the potential effects of disruptions to an organization's operations, and helps to identify the security controls and measures that should be implemented to reduce the impact of those disruptions. The BIA should include an assessment of the organization's information security posture, including its security policies, risk register, and enterprise architecture. With this information, organizations can develop an information security program that is aligned to the organization's business objectives.

 The best response for the organization to reduce risk from increasing cyberattacks is to revalidate and mitigate risks to an acceptable level. This means that the organization should review its current risk profile, identify any new or emerging threats, vulnerabilities, or impacts, and evaluate the effectiveness of its existing controls and countermeasures. Based on this analysis, the organization should implement appropriate risk treatment strategies, such as avoiding, transferring, accepting, or reducing the risks, to achieve its desired risk appetite and tolerance. The organization should also monitor and review the risk situation and the implemented controls on a regular basis, and update its risk management plan accordingly. This approach is consistent with the ISACA Risk IT Framework, which provides guidance on how to align IT risk management with business objectives and value12.

The other options are not the best responses because they are either too narrow or too reactive. Increasing budget and staffing levels for the incident response team may improve the organization’s ability to respond to and recover from cyberattacks, but it does not address the root causes or the prevention of the attacks. Implementing an intrusion detection system (IDS) may enhance the organization’s detection and analysis capabilities, but it does not guarantee the protection or mitigation of the attacks. Testing the business continuity plan (BCP) may verify the organization’s readiness and resilience to continue its critical operations in the event of a cyberattack, but it does not reduce the likelihood or the impact of the attack. References =

Risk IT Framework 1

CISM Review Manual, 16th Edition | Print | English 2, Chapter 3: Information Risk Management, pages 97-98, 103-104, 107-108, 111-112.

= An incremental backup method only backs up the data that has changed since the last backup, whether it was a full or an incremental backup. This method requires the least amount of time and storage space for backup, but it requires the most time to restore data for an application. To restore data from an incremental backup, the latest full backup and all the subsequent incremental backups are needed. A full backup method backs up all the data in a system or an application at a point in time. This method requires the most amount of time and storage space for backup, but it requires the least time to restore data for an application. To restore data from a full backup, only the latest full backup is needed. A differential backup method backs up the data that has changed since the last full backup. This method requires more time and storage space for backup than the incremental method, but less than the full backup method. It also requires less time to restore data for an application than the incremental method, but more than the full backup method. To restore data from a differential backup, the latest full backup and the latest differential backup are needed. A disk mirroring method creates an exact copy of a disk on another disk in real time. This method provides the highest level of availability and fault tolerance, but it also requires twice the amount of disk space. To restore data from a disk mirroring method, the mirrored disk can be used as the primary disk in case of a failure. References = CISM Review Manual 15th Edition, page 201-202.

The method that requires the MOST time to restore data for an application is a Full Backup. Full backups contain all the data that is required to restore an application, but the process of restoring the data is the most time-consuming as it involves copying all the data from the backup to the application. Incremental backups only backup the changes made since the last backup, differential backups only backup changes made since the last full backup, and disk mirroring provides real-time data replication, so the data is immediately available.