Incident Response · Topic 5 of 6
SOC Playbooks in Incident Response
Learn what SOC playbooks and runbooks are, what a playbook contains, and how SOAR automates playbooks to speed incident response for the CSA 312-39 exam.
- 5 min
- A playbook covers one incident type; the IR plan covers the whole program; a runbook covers one task.
- Playbooks include a trigger, roles, investigation steps, decision points, actions, escalation and documentation.
- SOAR automates playbooks through integrations with SIEM, EDR, firewall, email and ticketing.
What it is
A SOC playbook is a documented, repeatable set of steps for handling one type of incident, such as phishing, malware, brute force or data exfiltration. It tells analysts what to check, what to decide and what to do, in order, and who is responsible.
Playbooks turn the general incident response plan into concrete actions for common scenarios, so every analyst on every shift handles the same alert the same way.
How it works
Plan, playbook and runbook
| Document | Scope | Example |
|---|---|---|
| Incident response plan | Organization wide: roles, authority, phases, communication | The company IR plan |
| Playbook | One incident type, with decision points and roles | Phishing response playbook |
| Runbook | Detailed, often technical steps for a single task | How to isolate a host in the EDR console |
Terms overlap between vendors. On the exam, the playbook is the scenario level workflow, and the runbook is the step level procedure inside it.
What a playbook contains
| Part | Purpose |
|---|---|
| Trigger | The alert or report that starts it, such as a phishing report |
| Scope and objectives | What incident type it covers and the goal |
| Roles | Who does each step: Tier I, Tier II, IR lead, legal |
| Investigation steps | What data to gather and which checks to run |
| Decision points | If true positive, escalate; if false positive, close with notes |
| Containment and eradication actions | Block, isolate, disable, purge |
| Escalation and notification | When to call management, legal or regulators |
| Documentation | What to record in the ticket and the final report |
| Success criteria | When the case can be closed |
Playbooks are usually mapped to MITRE ATT&CK techniques, so the SOC can see which attack behaviors it has a response for.
Building and maintaining playbooks
Start from the incidents the SOC sees most and the ones with the highest impact. Write them with the IR plan, legal requirements and available tools in mind, then test them in tabletop exercises.
Review each playbook after real incidents and when tools or threats change. A playbook that references a retired tool or an old contact list fails when it is needed most.
Playbooks and SOAR
Security orchestration, automation and response (SOAR) platforms run playbooks as automated workflows. They connect the SIEM, EDR, firewall, email gateway, threat intelligence platform and ticketing system through integrations.
| Typically automated | Typically kept for a human |
|---|---|
| Enriching an alert with IP, domain and hash reputation | Deciding whether to shut down a production server |
| Extracting indicators from a phishing email | Notifying regulators or customers |
| Opening and updating tickets | Judging a complex, unclear alert |
| Blocking a known bad hash or domain | Disciplinary steps in insider cases |
Automation speeds response, reduces alert fatigue and lowers MTTR. Risky actions keep a human approval step so a faulty playbook cannot take down the business.
A sample phishing playbook flow
Public playbook sources
Organizations often adapt published material instead of starting blank. Examples include the CISA Federal Government Cybersecurity Incident and Vulnerability Response Playbooks and the playbook templates that SOAR and SIEM vendors ship with their products.
A worked example
A SOC receives about 200 phishing reports a week, and each takes an analyst 20 minutes. The team writes a phishing playbook, then builds it in SOAR so that extraction, reputation checks and ticket updates run automatically.
Analysts now review only messages the playbook marks malicious or unclear, and approve the purge step. Average handling time falls sharply, and every case is documented the same way.
How the exam asks about this
- "Which document gives step by step actions for handling one type of incident, such as phishing?" → A playbook.
- "Which platform executes playbooks automatically across security tools?" → SOAR.
- "Why should a playbook include a human approval step before isolating a critical server?" → To prevent automated actions from causing a business outage.
What to remember for the exam
- A playbook covers one incident type; the IR plan covers the whole program; a runbook covers one task.
- Playbooks include a trigger, roles, investigation steps, decision points, actions, escalation and documentation.
- SOAR automates playbooks through integrations with SIEM, EDR, firewall, email and ticketing.
- Automate enrichment and routine blocking; keep high impact decisions with people.
- Test playbooks in tabletop exercises and update them after real incidents.
A playbook guides, it does not replace judgment. If an incident does not match the playbook, escalate rather than force it through the wrong steps.
Common mistakes
Mixing up playbook and IR plan. The plan sets policy and roles for all incidents; a playbook is the specific workflow for one scenario.
Automating everything. Fully automatic containment on high value systems can cause outages from a false positive.
Writing playbooks once. Out of date tools, contacts and steps make a playbook fail during a real incident.
Check yourself
What is the difference between a playbook and a runbook?
A playbook is the workflow for one incident type with decisions and roles; a runbook is the detailed procedure for a single task within it.
Which tasks are good candidates for SOAR automation?
Repetitive, low risk tasks such as enrichment, indicator extraction, ticket updates and blocking known bad indicators.
How are playbooks kept effective?
By testing them in exercises and reviewing them after incidents and whenever tools or threats change.
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