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Coordinated processes to prepare for, detect, analyze, contain, eradicate, and recover from security incidents.
DESCRIPTION
Incident response (IR) is the organized approach to handling cybersecurity events to minimize impact and restore normal operations. It spans a lifecycle of preparation; detection and analysis; containment, eradication, and recovery; and post-incident activities. IR relies on clear roles, runbooks, communications plans, and evidence handling procedures. Effective IR integrates with SOC monitoring, forensics, and legal/compliance requirements. Postmortems convert incidents into durable improvements in controls, processes, and training.
ALTERNATIVE DEFINITIONS
NIST SP 800-61 Rev. 2
The incident response life cycle includes preparation; detection and analysis; containment, eradication, and recovery; and post-incident activity.
Defines a standard lifecycle structure for incident response activities.
AWS
Incident response is the process used to prepare for, detect, contain, and recover from a security incident in your AWS environment.
Frames incident response as a process and tailors to cloud environments.
RELATED TERMS
Incident Management Computer Security Incident Handling Digital Forensics Threat Hunting Security Operations Center Postmortem Detection Engineering Playbook
COMPETING TERMS
Disaster Recovery Business Continuity Management
KNOWLEDGE AREAS
Data Security Observability & Telemetry Software Engineering
TARGET AUDIENCE
Cybersecurity Engineer Chief Information Security Officer Security Architect IT Manager DevOps Engineer IT Auditor Cloud Architect
EXTERNAL SOURCES
- Wikipedia - Incident response
- FIRST - Global incident response guidance and best practices
- ENISA - Guidance on CSIRT capabilities and processes
- Microsoft Learn - Overview of incident response operations
TOP QUESTIONS
What are the phases of Incident Response?
Common phases are preparation; detection and analysis; containment; eradication; recovery; and post-incident activity. This lifecycle ensures structured handling and continuous improvement.
Category: Overview
Why is preparation crucial in Incident Response?
Preparation builds runbooks, tooling, access, and communication channels before crises. It reduces confusion and accelerates containment when incidents occur.
Category: Relevancy
How does Incident Response relate to Disaster Recovery?
Incident Response addresses security events and containment, while Disaster Recovery focuses on restoring systems and data after major disruptions. Both coordinate during severe incidents.
Category: Comparison
What metrics matter in Incident Response?
Mean time to detect, investigate, contain, and recover are core. Also track incident volume, severity distribution, and recurrence rate.
Category: Metrics
What is a common mistake in Incident Response?
Skipping evidence preservation compromises forensics and lessons learned. Another is unclear decision authority, which delays containment.
Category: Mistakes
How should communication be handled during Incident Response?
Use predefined channels, plain status updates, and stakeholder-specific messages. Maintain an incident log for decisions and timelines.
Category: Management
How do playbooks help Incident Response?
Playbooks provide step-by-step guidance for common scenarios, reducing variability and speeding decisions, while still allowing expert judgment.
Category: BestPractices
What triggers an Incident Response?
Alerts from monitoring, user reports, threat intel advisories, or observed anomalies can trigger triage and escalation.
Category: Example
How does Incident Response support regulatory compliance?
It documents actions, containment, and notifications, helping meet breach reporting, evidence handling, and audit requirements.
Category: Compliance