Incident response is the structured process an organization uses to detect, respond to, and recover from cybersecurity incidents (opens in new tab) once possible malicious activity surfaces, then apply what it learned so the same attack does not succeed twice.
NIST frames it as the remediation or mitigation (opens in new tab) of violations of security policies and recommended practices, work that begins with detection (opens in new tab) of suspicious activity. By contrast, disaster recovery (opens in new tab) restores systems after a major loss of capability.
How incident response works
Incident response is a repeating cycle (opens in new tab). The six-step PICERL model (opens in new tab) remains a widely used version:
- Preparation
- Identification
- Containment
- Eradication
- Recovery
- Lessons Learned
Each pass begins when something qualifies as a cybersecurity incident (opens in new tab), an occurrence that jeopardizes the confidentiality, integrity, or availability of information or a system, or violates law, security policy, or acceptable use policy.
The April 2025 revision of NIST SP 800-61 (Revision 3) maps this work to the six Functions of Cybersecurity Framework 2.0, replacing the older four-phase model. Govern, Identify, and Protect are the preparation sitting behind a response; Detect, Respond, and Recover carry the response itself, from finding and analyzing a possible compromise to acting on a confirmed one and restoring the affected assets.
Lessons learned feed continuous improvement back into every Function.
A business email compromise (opens in new tab) attempt shows the cycle in miniature. An employee reports a suspicious email (opens in new tab), the security team triages and confirms a credential lure, and containment restricts account access. Eradication removes malicious components and disables breached accounts (opens in new tab), sometimes overlapping with recovery rather than finishing before it, and the post-incident review sharpens the impersonation playbook for the next attempt.
Why incident response matters
Regulatory clocks now define how fast a response program must move. Controllers subject to GDPR must notify supervisory authorities (opens in new tab) promptly after becoming aware of a personal data breach (opens in new tab). US public companies must disclose material cybersecurity incidents (opens in new tab) on Form 8-K soon after judging them material.
Financial entities under the EU's DORA framework face a short reporting deadline (opens in new tab) once they classify an ICT incident as major, timed from when they became aware (opens in new tab) of it. Each clock starts when someone judges an incident major or material, before forensics produces a complete picture.
Attackers are compressing the window from the other side, using AI to move faster and more effectively (opens in new tab) across the attack lifecycle (opens in new tab). That acceleration puts a premium on detecting, classifying, and documenting incidents in near real time.
Core components of an incident response program
A mature incident response program rests on a few documented, tested building blocks:
- Policy and plan. An incident response policy is the foundation of the program (opens in new tab); it defines which events count as incidents and sets the response structure, roles, and reporting requirements. The plan builds on it with mission, strategy, senior-management approval, communication protocols, severity ratings, escalation points, and metrics.
- Playbooks. Build playbooks for your handful of most likely, highest-risk incident types (opens in new tab). Each should cover at least the first few hours (opens in new tab), which are the most critical and time-pressured.
- Response team. A Computer Security Incident Response Team (CSIRT) provides the services and support (opens in new tab) a defined constituency needs to prevent, detect, and handle incidents. Leadership funds the team and owns high-impact decisions, handlers verify and analyze incidents and act, and legal advises on notification obligations.
- Communications planning. Set incident coordination, notification, public communication, and information sharing (opens in new tab) in advance.
What responders say in the heat of recovery carries legal weight (opens in new tab), so the plan must fix what they can say, to whom, and when before an incident.
How to strengthen incident response
Rehearsal and reach are what separate a plan on paper from a program that holds up under a live incident.
- Test before it is real. Run tabletop exercises (opens in new tab) to pressure-test the program and surface gaps ahead of a live incident. Post-incident reviews (opens in new tab) should capture what worked and why, not only what failed, and you update the plan after every incident (opens in new tab) so the next response inherits the fix. One federal agency found mid-incident that no GitHub or cloud playbook existed and had to write one during the live response (opens in new tab).
- Extend response beyond the perimeter. Impersonation and credential-lure incidents run on infrastructure you do not own, including lookalike domains (opens in new tab), spoofed social profiles (opens in new tab), scam ads (opens in new tab), and cloned pages (opens in new tab), so containment has to reach outside your network.
- Confirm the whole campaign is down. After one asset comes down, check for related ones still live before closing the case; fast-flux techniques (opens in new tab) keep phishing sites resolving through a takedown. Correlate registration and hosting data with certificate overlaps (opens in new tab) into campaign-level views (opens in new tab), then file takedown requests (opens in new tab) with each registrar, host, social and ad platform, and payment channel the campaign uses.
- Work each takedown path separately. A provider can pull the cloned page while the lookalike domain still resolves and the fraudulent ad account still runs, so track each path's evidence and timeline on its own and keep pushing the ones that stall.
Document each platform's reporting process (opens in new tab) and evidence requirements before an attack, not during one.
How Doppel helps
Doppel is the AI-native Social Engineering Defense (SED) (opens in new tab) platform that unifies Digital Risk Protection (DRP) (opens in new tab) and Human Risk Management (HRM) (opens in new tab), correlates attacker infrastructure into campaigns, and dismantles it at the source.
Across external surfaces (opens in new tab), the Doppel Threat Graph (opens in new tab) links lookalike domains and fake profiles to scam ads in one multi-channel campaign view (opens in new tab), ranked channel by channel so responders hit the assets doing the most damage first and work the whole operation instead of one asset.
Doppel's agentic AI correlates and prioritizes at scale and enforces takedowns through provider integrations (opens in new tab), while human analysts handle the escalations that need judgment. Dismantling the persistent upstream infrastructure that lets attackers rebuild is how we make your brand too costly to attack.
A guided session traces one impersonation lure from the initial report through correlation and takedown to campaign dismantlement. Request a demo (opens in new tab) to get started.
Frequently asked questions about incident response
What is incident response?
Incident response is the structured process an organization uses to manage a security incident: detecting it, containing and eradicating the threat, recovering normal operations, and applying the lessons so it does not recur. The standard NIST definition (opens in new tab) centers on remediating or mitigating violations of security policy. Documented plans and playbooks guide the internal or external handlers who run the process.
What is incident response in cybersecurity?
In cybersecurity, incident response is the discipline of detecting, responding to, and recovering from attacks on an organization's systems and data. Teams typically run it as a repeating cycle. The six-step PICERL model (Preparation, Identification, Containment, Eradication, Recovery, Lessons Learned) is the long-standing reference, while NIST SP 800-61 Revision 3 (opens in new tab) now distributes the work across the Cybersecurity Framework 2.0 Functions: Govern, Identify, Protect, Detect, Respond, and Recover.
What is the difference between incident response and disaster recovery?
Incident response and disaster recovery are separate plans (opens in new tab). Incident response focuses on detecting an attack, containing it, and protecting information assets while responders handle it. A disaster recovery plan (opens in new tab) addresses a major loss of enterprise capability or damage to facilities, and centers on restoring IT systems. A related business continuity plan (opens in new tab) covers how the organization sustains mission and business processes during and after a major disruption.
What is an example of incident response?
A business email compromise response is a common example. An employee reports a suspicious message (opens in new tab), and the security team confirms an attacker has compromised the account. Containment restricts access to the affected accounts; eradication typically disables them. If an outside organization is involved, the team coordinates notification with legal counsel. After recovery, a post-incident review documents the root cause and updates the playbook for the next attempt.