FedRAMP Audit Logging Requirements (AU Controls) and SIEM Evidence

AU Themes Assessors Expect

• Event types covering authentication, privileged actions, security function changes, and access to sensitive data stores
• Content sufficient for reconstruction (who, what, when, where, outcome)
• Protection against unauthorized access and tampering
• Retention aligned to your baseline and organizational policy
• Review, analysis, and reporting — not shelfware logs

SIEM as FedRAMP Evidence

ThreatHawk SIEM centralizes log ingestion, correlation, retention, and investigation so AU narratives in the SSP map to real pipelines. See the product page for ConMon-oriented use: ThreatHawk for FedRAMP.

Operational Checklist

1. Inventory in-scope log sources and ownership
2. Normalize time sync (NTP) across collectors
3. Define alert use cases for privileged misuse and boundary violations
4. Document retention and export procedures for 3PAO sampling
5. Tie incidents and tickets back to detections for IR + AU linkage

How CyberSilo Helps

• Evidence workflows for SSP, POA&M, and control status via Compliance Standards Automation
• ThreatHawk SIEM for AU-family logging, ConMon telemetry, and investigation evidence
• Advisory scoping for readiness, baseline selection, and agency-path planning — contact CyberSilo

Frequently Asked Questions

Is a SIEM mandatory for FedRAMP?

FedRAMP requires meeting AU (and related) controls. A SIEM is the practical way most CSPs prove collection, correlation, review, and retention at cloud scale.

Do we log customer tenant data?

Log security-relevant events per your shared-responsibility model and privacy constraints — define boundaries clearly in the SSP.

How does AU relate to ConMon?

AU evidence underpins monthly and annual monitoring claims; weak logging makes ConMon and IR narratives hard to defend.

Related FedRAMP Resources

ThreatHawk FedRAMP · ConMon · FIPS 140-3 · Hub