AU-16 Cross-Organizational Audit Logging
Coordinates logging across organizational boundaries so that activity spanning the organization and its suppliers can be reconstructed.
3
artefacts
1
held by a system
1
at each review
moderate
to go live
SIEM / log platform
where the evidence lives
teal = a system already holds it · olive = produced at each review
system holds itEvidence a system already holds
- Agreements covering log sharing and retention with suppliers · SIEM / log platform
periodic reviewEvidence produced at each review
- Evidence of correlated cross-boundary investigation · Document repository
governing documentDocuments that govern the control
- Time synchronization agreement · Vendor register / contract repository
First move
Start with the 1 of 3 artefacts that already live in a system (SIEM / log platform); keep the periodic reviews but log each one as a dated record with a named reviewer.
Common gaps auditors find
- supplier logs unobtainable during an incident
- retention periods incompatible across the boundary
Do this for your whole sheet
Paste the rows you run your controls from and get this mapping for every control at once, with the periodic-review ones flagged and a first move per row. No account for the first run.
Build my evidence sheet