The question is no longer whether your organization will face a security incident — it's whether you'll be prepared when it happens. Organizations that have built and exercised an incident response (IR) capability handle breaches faster, with less damage, and with significantly better outcomes than those improvising in the moment.
What an Incident Response Plan Covers
An IR plan is a documented, pre-approved set of procedures for detecting, containing, eradicating, and recovering from security incidents. A good plan addresses:
Preparation: What capabilities do we have in place? What tools, what retainers, what communication channels, what playbooks?
Detection and analysis: How do we know when something is happening? What are our detection sources, and who reviews them? How do we triage and escalate?
Containment: How do we stop the bleeding? What's our authority to take systems offline, block network traffic, or lock accounts without waiting for a committee decision?
Eradication: How do we remove the threat actor from our environment — not just remediate the visible symptoms?
Recovery: How do we restore normal operations in a validated, secure state?
Post-incident activity: What did we learn? What changes do we make to prevent recurrence?
The NIST IR Framework
NIST SP 800-61 is the reference document for incident response and is worth reading. It defines the four phases above and provides practical guidance on each. Most mature IR programs are built on this framework or a close variant of it.
Who Needs to Be Involved
Incident response isn't just a security team function. Depending on the nature and severity of the incident, you'll need involvement from:
- Legal counsel — Privilege considerations, regulatory notification obligations, liability management
- Communications/PR — Customer notifications, media inquiries
- HR — If the incident involves an insider threat or employee data
- Finance/Operations — Business impact assessment, insurance claims
- Executive leadership — Decision authority for significant containment or recovery actions
Pre-establish who plays each role and how they get contacted. An incident is the wrong time to figure out that your legal contact has a new phone number.
The Retainer Question
For most organizations, having a cybersecurity incident response retainer with a specialized firm is worth the annual cost. A retainer guarantees response time (typically 4–24 hours), gives you access to forensic capabilities you don't maintain in-house, and provides experienced advisors when you need them most.
IR retainers are also increasingly required by cyber insurance policies. Check your policy.
Playbooks for Common Scenarios
A general IR plan is necessary but not sufficient. Playbooks for specific scenarios — ransomware, business email compromise, credential theft, data exfiltration — give responders step-by-step guidance for the most common incident types. They reduce decision fatigue and ensure consistency.
Building playbooks is a practical exercise that surfaces gaps: "In a ransomware scenario, who makes the call about whether to pay the ransom? What's our authority to take the entire network offline?" These conversations are much better had in advance.
Test It
An IR plan you've never practiced is a plan you'll execute poorly under stress. Tabletop exercises walk leadership through a realistic scenario. Technical team exercises test actual detection and response procedures.
Run at least one tabletop annually. If you've had a significant incident in the past year, run another one that addresses what went wrong.