Proving That Your Audit Logging Program Is Actively Managed
The assessment objective AU.L2-3.3.7[b] focuses on demonstrating that your audit logging program is not only defined but also actively managed, maintained, and reviewed. Documentation alone is insufficient; you must provide evidence that the audit logging processes are in operation, routinely exercised, and integrated into normal security operations. Active management means logs are collected, protected, reviewed, and responded to on an ongoing basis rather than being configured once and forgotten. Assessors will look for evidence showing reviewers regularly examine log content, identify anomalies, and take action where appropriate.
Audit logs are central to incident investigation, accountability, and detection of unauthorized activity in systems that process, store, or transmit Controlled Unclassified Information (CUI). Verifying that logs are actively managed strengthens confidence that logging is a reliable source of truth for security events and that your organization can detect and respond to potential issues in a timely manner.
Key Components of an Actively Managed Logging Program
An actively managed audit logging program has several elements that assessors expect to see in practice:
- Log collection: Logs are consistently collected from systems in scope and retained according to documented criteria.
- Log protection: Logs are protected from tampering and unauthorized access.
- Log monitoring and review: Logs are reviewed regularly by an assigned owner or team to identify anomalies or unauthorized activities.
- Response to findings: There is a documented process for responding to significant log findings and following up on identified issues.
- Retention enforcement: Logs are retained for a period that meets organizational and compliance requirements.
Assessors will typically sample logs, examine review records, and confirm that logs are used for investigation and awareness rather than only being collected and archived without operational utilization.
Why Active Management Matters for CMMC Compliance
Active management distinguishes logs that are merely collected from logs that are leveraged for visibility and security assurance. Without ongoing review, critical events may go unnoticed, reducing your ability to detect unauthorized access, configuration changes, or potential breaches. Actively managed logging also provides evidence of operational discipline that aligns with your documented logging policy and incident response procedures. For broader context, link your logging processes to broader access control and system monitoring strategies, including those developed for CUI program compliance and associated expectations for traceability and evidence retention.
Assessment Evidence for Active Logging Management
Assessors typically seek artifacts that demonstrate recurrence and action. Simply providing log files is not sufficient if there is no evidence of review and response. Typical evidence includes:
- Log review reports that document findings, reviewer comments, and follow-up actions.
- Records showing routine review cadence and assigned reviewers.
- System logs showing review timestamps and identities of reviewers.
- Incident tickets or response artifacts triggered by findings in logs.
- Retention records showing logs are preserved per policy.
Assessors often correlate log review artifacts with incidents or configuration changes to determine whether the logging program is actively contributing to securing your environment rather than functioning only as a record-keeping mechanism.
Implementation Practices That Support Active Management
Define a review cadence
Set a regular review schedule (for example, daily for critical logs and weekly for less sensitive logs) and ensure review dates are recorded. While automation tools like SIEM platforms can highlight noteworthy events, human review is often necessary to contextualize findings and determine appropriate follow-up actions.
Assign accountable reviewers
Document and assign specific reviewers or review teams responsible for evaluating log content on schedule. Evidence of reviews should show reviewer identity and the context of the review (date, system scope, and findings). Ownership plays a role in accountability and helps demonstrate repeatability.
Document and act on anomalies
Define what constitutes a notable finding in log data and ensure that anomalies trigger documented responses. Tickets or cases created to investigate log anomalies provide strong assessment evidence that your logging program contributes to operational awareness and security response efforts.
Protect logs from tampering
Ensure logs are stored securely with access controls that prevent unauthorized modification. Evaluate whether logs are backed up or archived in a way that ensures continuity and protections against alteration. This supports integrity, which is essential for investigative reliability.
Common Implementation Gaps and Assessment Findings
- Logs are collected but not routinely reviewed or correlated with meaningful events.
- Log review artifacts lack reviewer identity, dates, or actions taken.
- Response processes for anomalies are undefined or undocumented.
- Log retention is inconsistent with documented requirements.
- Logs are stored in locations without protections against tampering or unauthorized access.
Implementation and Evidence Mapping Table
| Area | Required Action | Configuration or Artifact | Assessment Evidence |
|---|---|---|---|
| Log collection consistency | Ensure logs are captured from all in-scope systems | Collection configuration | Log samples from each system |
| Log review and monitoring | Review logs routinely | Review reports | Reports with reviewer identity and dates |
| Response to findings | Initiate action on anomalies | Incident/response tickets | Ticket records tied to log reviews |
| Retention and protection | Retain logs per policy and protect from tampering | Retention schedule | Archive evidence and access controls |
| Accountability | Assign and document reviewers | Roles and responsibilities | Documented reviewer assignments |
FAQ
What does AU.L2-3.3.7[b] require?
It requires proof that audit logs are actively managed through routine collection, review, response to findings, and retention consistent with policy.
What evidence shows active management?
Assessors look for log review reports with reviewer identity and follow-up actions, incident tickets tied to log findings, and retention records.
Why is active management important?
Active management ensures logs are not just collected but used for visibility, anomaly detection, and security response, strengthening traceability and accountability.