Benefits:

Enhanced Security: By periodically reviewing and updating logged events, organizations can ensure they capture the most relevant information for monitoring, analysis, and investigation of security incidents. This allows for faster detection, containment, and recovery, ultimately reducing the impact of potential breaches.

Improved Compliance: Adherence to the "review and update logged events" requirement helps organizations meet various regulatory compliance mandates that demand robust audit logging practices.

Reduced Storage Costs: Regularly assessing logged events allows for the removal of obsolete or unnecessary data from logs. This helps optimize storage space and minimize associated costs.

Streamlined Analysis: Focusing on relevant events reduces noise and clutter in audit logs, making it easier for security analysts to identify critical information and conduct efficient investigations.

Accountability:

Senior Management By overseeing the implementation and effectiveness of security controls, senior management holds ultimate accountability for information security. They ensure resources are allocated, policies are established, and the organization adheres to compliance requirements.

IT Security Team They are responsible for designing, implementing, and maintaining security controls. This includes selecting appropriate logging events and ensuring their accuracy and integrity. They are accountable for identifying and addressing any logging process failures.

System Owners They own specific systems and applications and are accountable for ensuring security controls are implemented effectively within their domain. This includes understanding the system's logging capabilities and working with the IT security team to define relevant events for logging.

Individual Users While not explicitly mentioned in "3.3.3," user accountability is crucial. Users are responsible for adhering to security policies and procedures, including appropriate use of systems and data. Audit logs provide evidence of user activity, facilitating investigations and potential disciplinary actions in case of policy violations.

Implementation:

Establish a Review Process: Define a regular schedule for reviewing the list of logged events. This could be quarterly, annually, or based on specific system changes or updates.

Identify Relevant Events: During the review, assess the relevance and necessity of each logged event. Consider factors like security risk, regulatory requirements, and operational needs.

Update the Log List: Based on the review, add new events deemed necessary and remove obsolete or irrelevant ones. This may involve adjusting system configurations or security tools used for logging.

Document the Process: Maintain clear documentation outlining the review process, including the schedule, criteria for evaluation, and the responsible individuals.

Train Personnel: Educate relevant personnel, including security and IT staff, on the review process, the importance of logged events, and their roles in maintaining the log list.