what is a cyber security incident response plan

Enterprise Cyber Security Incident Response Protocol

Document Control

• Document ID: [__________]
• Version: [__________]
• Effective Date: [__________]
• Review Cycle: [Annual/Bi-Annual]

1. Purpose & Scope

This document establishes the standardized methodology for detecting, containing, eradicating, and recovering from information security threats at [Company Name]. This protocol applies to all employees, contractors, and third-party vendors with access to [Company Name] information systems.

2. Prerequisites

• Communication: Access to secure out-of-band communication channel ([e.g., Signal, encrypted Slack, or designated emergency phone tree]).
• Tools: Access to [SIEM/Log Management Platform], [Endpoint Detection & Response (EDR) Tool], and [Forensic Imaging Software].
• Documentation: Current network topology diagrams and asset inventory located at [Link/Location].
• Authority: Pre-authorized sign-off for emergency system isolation and third-party forensic engagement.

3. Roles & Responsibilities (RACI)

4. Step-by-Step Procedure

Phase 1: Preparation & Detection

• Ensure all logging agents are active on [Critical Assets].
• Baseline normal traffic patterns for [Primary Network Segments].
• Verify that [Security Operations Center] alerts are routing to [Primary Contact].

Phase 2: Identification & Analysis

• Validate the alert veracity to eliminate false positives.
• Document the initial timestamp: [__________].
• Determine scope: identify affected hosts, user accounts, and data classifications.
• Assign an initial severity level: [Low/Medium/High/Critical].

Phase 3: Containment

• Execute short-term containment: [e.g., isolate infected VLAN, disable compromised credentials].
• Capture volatile memory (RAM) and disk images for forensic analysis.
• Perform long-term containment: [e.g., apply firewall blocks, patch vulnerabilities, rotate administrative keys].

Phase 4: Eradication & Recovery

• Remove malicious artifacts (malware, backdoors, unauthorized accounts).
• Restore systems from verified clean backups dated [__________].
• Conduct vulnerability scanning to ensure the threat vector is closed.
• Monitor systems for re-infection for a period of [__________] hours/days.

Phase 5: Post-Incident Activity

• Conduct a "Lessons Learned" meeting within [__________] business days.
• Update this protocol based on identified process gaps.
• Submit final incident report to [Management/Board/Regulator].

5. Quality Assurance & Pro-Tips

• Pro-Tip: Always maintain a physical, printed copy of this document in a secure location. If the network is compromised, you may lose access to digital documentation.
• Common Pitfall: Over-communicating during the heat of an incident. Keep updates restricted to the Incident Response Team until the situation is contained.
• QA: Perform quarterly "Tabletop Exercises" to simulate a breach and test the effectiveness of this document.

6. FAQs

Q: When should I escalate an event to a "Critical" incident? A: Escalate immediately if the event involves exfiltration of PII/PHI, unauthorized access to root/administrative credentials, or a total loss of business-critical service availability.

Q: Who is authorized to communicate with the press during an incident? A: Only the designated [Company Spokesperson/PR Lead] is authorized to provide statements. All other personnel must refer inquiries to that individual.