Asd Cyber Incident Response Plan Template

Standard Operating Procedure: Cyber Incident Response Plan (CIRP)

Document ID: TR-SEC-IRP-001
Effective Date: 2023-10-27
Version: 1.0.0
Review Cadence: Semi-Annual (or post-incident)

1. Executive Summary & Purpose

This document establishes the institutional framework for detecting, analyzing, containing, eradicating, and recovering from cyber security incidents at Template Registry. The objective is to minimize business impact, ensure regulatory compliance, and maintain operational integrity through a structured, reproducible response lifecycle.

2. Scope & Prerequisites

• Scope: All digital assets, cloud environments, endpoint devices, and data stores managed by Template Registry.
• Required Tools:
  • SIEM/SOAR: Access to primary logging aggregation (e.g., Splunk, Sentinel).
  • Forensic Suite: Volatility, FTK Imager, Wireshark.
  • Communication: Out-of-band encrypted channel (e.g., Signal, private Slack instance).
• PPE: N/A (Digital operations).

3. Roles & Responsibilities (RACI)

4. Step-by-Step Procedure

Phase I: Detection & Analysis

• Log telemetry ingestion validation.
• Assign severity (Low: Localized; Medium: Segmented; High: Enterprise-wide).
• Verify Indicators of Compromise (IoCs) via threat intelligence feeds.

Phase II: Containment

• Isolate affected VLANs/subnets from the production backbone.
• Revoke compromised credentials/API keys.
• Snapshot disk/memory for forensic chain-of-custody.

Phase III: Eradication

• Identify root cause (e.g., patch vulnerability, malicious process, insider threat).
• Wipe/reimage compromised assets from "Golden Images."
• Conduct full credential rotation across affected segments.

Phase IV: Recovery & Post-Incident

• Restore services from immutable, verified clean backups.
• Conduct Post-Incident Review (PIR) within 72 hours.
• Document lessons learned and update security controls/SOP.

5. Quality Assurance & Pro-Tips

• Metric Thresholds:
  • MTTD (Mean Time to Detect): < 15 minutes for critical alerts.
  • MTTR (Mean Time to Respond): < 4 hours for Tier-1 containment.
• Pro-Tips:
  • Avoid "Analysis Paralysis": Prioritize containment over perfect forensic attribution during an active event.
  • Immutable Logging: Ensure audit logs are shipped to a write-once-read-many (WORM) storage bucket.
• Common Pitfalls:
  • Using compromised communication channels (e.g., email) to discuss response strategies.
  • Failing to document "who did what" during the heat of the moment.

6. Frequently Asked Questions

Q: At what point do we notify external stakeholders?
A: Notify Legal immediately upon confirming a PII/PHI breach. Regulatory reporting (e.g., GDPR/CCPA) is triggered based on specific statutory timelines; do not self-report until Legal advises.

Q: How do we handle "False Positives" in an automated response workflow?
A: If an automated system flags a critical service, verify against a secondary out-of-band source before initiating hard isolation. Document the trigger as a "Tuning Opportunity" in the next Sprint.

Approved by:
Julian Vance
Chief Architect, Template Registry