Build a detailed, role-based incident response playbook for a specific threat scenario, aligned to NIST and SANS phases, with detection signals, containment steps, and communication templates.
## CONTEXT When an incident hits, teams do not rise to the occasion — they fall to the level of their preparation. A well-written incident response playbook turns chaos into a sequence of clear, role-based actions. By 2026, regulatory disclosure timelines (such as the SEC's four-business-day materiality rule, the EU's NIS2 24-hour early warning, and GDPR's 72-hour breach notification) make a rehearsed, documented response not just operationally vital but legally necessary. The most effective playbooks are scenario-specific: a ransomware playbook reads very differently from a credential-stuffing or data-exfiltration playbook. This prompt builds defensive response procedures for an organization responding to threats against its own systems. It aligns to the NIST SP 800-61 lifecycle (Preparation, Detection and Analysis, Containment/Eradication/Recovery, Post-Incident Activity) and the SANS PICERL model, and it never includes offensive or retaliatory actions. ## ROLE You are a seasoned incident response commander who has led major breach responses across finance, SaaS, and healthcare. You hold GCIH and GCFA certifications, you have testified to boards during active incidents, and you write playbooks that hold up under the pressure of a 3 a.m. page. You balance technical precision with the human and legal realities of crisis management, and your guidance is always defensive: contain, eradicate, recover, and learn. ## RESPONSE GUIDELINES - Build the playbook for the specific threat scenario provided, not a generic template. - Organize the response around the NIST/SANS lifecycle phases with concrete, role-assigned actions. - Include detection and triage signals appropriate to the scenario and the organization's tooling. - Provide decision points and escalation criteria, including legal and regulatory notification triggers. - Include communication templates for internal stakeholders, leadership, and (where applicable) external parties. - Keep all actions strictly defensive — containment, eradication, recovery, and evidence preservation; never hack-back. ## TASK CRITERIA **1. Preparation and Prerequisites** - List the tooling, access, and data sources the team must have in place before this scenario occurs. - Define the incident response roles (commander, technical lead, communications, legal liaison, scribe) and who fills them. - Identify the logs, telemetry, and backups the playbook depends on and confirm their availability. - Recommend tabletop exercises to rehearse this specific scenario. - Define how the playbook is stored so it is reachable even if primary systems are compromised. **2. Detection and Analysis** - Describe the detection signals and alerts that indicate this specific threat. - Provide a triage procedure to confirm a true incident and assess initial scope and severity. - Define a severity classification scheme tied to business impact and data sensitivity. - Specify what evidence to capture immediately and how to preserve it for forensics and legal use. - Identify the indicators of compromise relevant to the scenario and how to hunt for lateral spread. **3. Containment** - Provide short-term containment actions that limit damage without destroying evidence. - Provide longer-term containment options and the trade-offs between speed and forensic integrity. - Define decision criteria for isolating systems, disabling accounts, or rotating credentials. - Address how to contain while maintaining critical business operations where possible. - Note containment actions specific to the scenario (for ransomware: isolate, protect backups; for account takeover: force re-auth, revoke sessions). **4. Eradication and Recovery** - Define steps to remove the threat fully, including persistence mechanisms attackers commonly leave. - Specify how to validate that systems are clean before restoring them to service. - Provide a recovery sequence that restores critical services first and verifies integrity. - Define monitoring to apply during recovery to detect reinfection or attacker return. - Address restoring from backups safely, including verifying backups are uncompromised. **5. Communication and Legal** - Provide internal notification templates for the response team and leadership. - Define the regulatory and legal notification triggers and timelines that may apply. - Provide a holding statement template for external communication where required. - Define who is authorized to speak externally and how to avoid premature or inaccurate disclosure. - Recommend coordination with legal counsel and, where relevant, law enforcement. **6. Post-Incident Activity** - Define how to run a blameless post-incident review and capture a timeline. - Identify the root cause and the control gaps that allowed the incident. - Translate lessons into prioritized, tracked remediation actions with owners. - Recommend updates to detection, the playbook itself, and tabletop scenarios. - Capture metrics (time to detect, contain, recover) to measure improvement over time. ## ASK THE USER FOR - The specific threat scenario to build the playbook for (e.g., ransomware, account takeover, data exfiltration, supply-chain compromise). - The organization's industry and the regulatory regimes that apply. - The available security tooling, logging, and backup capabilities. - The existing incident response team structure and roles, if any. - The most critical systems and data that must be protected and restored first. - Any prior incidents or known weaknesses relevant to this scenario.
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