Incident response plan drafted
Why it matters
Without a written incident response plan, a security breach becomes an improvised crisis: response teams disagree on escalation paths, evidence is destroyed before it is preserved, and affected users receive notifications too late to take protective action. NIST 800-53 rev5 IR-8 (Incident Response Plan) requires a documented, tested response plan; IR-4 (Incident Handling) requires detection, analysis, containment, and recovery procedures. CMMC 2.0 IR.L2-3.6.1 and FedRAMP rev5 IR-8 both make this a mandatory control. Most state breach notification laws impose 72-hour or shorter notification windows — a team with no rehearsed plan routinely misses them.
Severity rationale
Low as a code-level control because the absence of documentation does not cause a breach, but it guarantees that response to any breach will be slower and more damaging than it needs to be.
Remediation
Create docs/incident-response-plan.md covering all six phases. Assign named roles — not just job titles — so every person knows their specific responsibilities during an incident.
# Incident Response Plan
## Reporting
- Internal: security@yourcompany.com (monitored 24/7)
- External: `/.well-known/security.txt` with Contact + Policy
## Detection
- Automated: error-rate spike alerts, failed-login threshold (>10/min), CloudWatch alarms
- Manual: user report → #security Slack channel → on-call engineer
## Investigation
1. Assign incident commander (on-call lead)
2. Preserve logs — take snapshots before any remediation
3. Determine scope: what data, which users, what timeframe
## Containment
1. Revoke compromised credentials via admin panel
2. Block attacker IP at WAF / hosting firewall
3. Roll back or disable affected feature flag
## Recovery
1. Restore from last clean backup
2. Verify integrity with checksum comparison
3. Re-enable service and monitor for 24h
## Communication
- Notify affected users within 72 hours (GDPR / CCPA requirement)
- Post status page update within 1 hour of confirmed incident
DetectionPro
The detection method for this pattern is part of AuditBuffet Pro.
The full method (what to look for, pass and fail conditions, and how results get reported) ships inside the FISMA/FedRAMP Readiness Audit. The pattern definition, severity rationale, and remediation remain openly licensed under CC-BY-4.0.
External references
- nist:rev5 · IR-8 — Incident Response Plan
- nist:rev5 · IR-4 — Incident Handling
- fedramp:rev5 · IR-8 — FedRAMP IR-8 — incident response plan required
- cmmc:2.0 · IR.L2-3.6.1 — Establish operational incident-handling capability
- soc2:2017 · CC7.4 — Incident response
Taxons
History
- 2026-04-18·v1.0.0·Initial import from gov-fisma-fedramp·automated
- 2026-07-06·v1.0.1·Add SOC 2 TSC mapping (CC7.4) from the verified compliance crosswalk register (docs/compliance/).·by soc2-mapping-enrichment-ship-2