| name | AU-4(1)_transfer-to-alternate-storage |
| description | Transfer audit logs [organization-defined] to a different system, system component, or media other than the system or system component conducting the |
| category | information-gathering |
| version | 5.2.0 |
| author | cyberstrike-official |
| tags | ["nist","sp800-53","rev5","au-4-1","au","enhancement"] |
| tech_stack | ["aws","azure","gcp","linux","windows"] |
| cwe_ids | ["CWE-778"] |
| chains_with | [] |
| prerequisites | ["AU-4"] |
| severity_boost | {} |
AU-4(1) Transfer to Alternate Storage
Enhancement of: AU-4
High-Level Description
Family: Audit and Accountability (AU)
Framework: NIST SP 800-53 Rev 5
Audit log transfer, also known as off-loading, is a common process in systems with limited audit log storage capacity and thus supports availability of the audit logs. The initial audit log storage is only used in a transitory fashion until the system can communicate with the secondary or alternate system allocated to audit log storage, at which point the audit logs are transferred. Transferring audit logs to alternate storage is similar to AU-9(2) in that audit logs are transferred to a different entity. However, the purpose of selecting AU-9(2) is to protect the confidentiality and integrity of audit records. Organizations can select either control enhancement to obtain the benefit of increased audit log storage capacity and preserving the confidentiality, integrity, and availability of audit records and logs.
What to Check
How to Test
Step 1: Review Documentation
Examine the System Security Plan (SSP) and related artifacts for AU-4(1) implementation details. Verify the organization has documented how this control is satisfied.
Step 2: Validate Implementation
# For cloud environments, use cloud-audit-mcp tools
# For on-premises, review system configurations directly
# Example: Check if account management policies exist
grep -r "account.management\|access.control" /etc/security/ 2>/dev/null
Step 3: Test Operating Effectiveness
Verify the control is actively functioning, not just documented. Check logs, configurations, and operational evidence.
Tools
| Tool | Purpose | Usage |
|---|
| cloud-audit-mcp | Check logging configuration | cloud_audit_logging |
| AWS CLI | Review CloudTrail/CloudWatch | aws cloudtrail describe-trails |
