🛡️ CISO Playbook • Incident Response & Resilience

The CISO’s Blueprint: A Complete Incident Response Framework for Detection, Recovery, and Resilience

By CyberDudeBivash • October 07, 2025 • Strategic Pillar Post

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IR Framework: Table of Contents

Incident Response (IR) is not a dusty playbook you pull off the shelf after a breach. It is a continuous, living lifecycle that defines your organization’s resilience. A mature IR program is not reactive; it is a proactive engine for continuous security improvement. This blueprint, based on the NIST Cybersecurity Framework, outlines the four critical phases of a modern, resilient IR program.

Phase 1: Preparation (Know Thyself, Know Thy Enemy)

This is the most important phase. The quality of your preparation determines the success of your response.

Know Thyself: You must have a complete and current asset inventory. You cannot protect what you do not know you have. This includes a “crown jewel” analysis to identify your most critical data and systems.
Know Thy Enemy: You must have a robust threat intelligence program to understand the TTPs of the adversaries most likely to target you.
**Prepare Your Team & Tools:** This includes building and testing your IR playbooks, conducting regular tabletop exercises, and ensuring your security stack (EDR, SIEM, SOAR) is properly configured and healthy.

Phase 2: Detection & Analysis (Finding the Needle in the Haystack)

This is the core function of your Security Operations Center (SOC). Success in this phase depends on moving beyond legacy, signature-based alerting.

**The Technology:** A traditional SIEM that just collects logs is not enough. You need a modern **XDR platform** that can correlate telemetry from endpoints, networks, and the cloud to provide a single, unified view of an attack.
**The Process:** Your SOC must mature from chasing low-fidelity alerts (**IOCs**) to proactively hunting for the high-fidelity behaviors of an attacker (**IOAs**). This requires a skilled team and a powerful EDR/XDR tool.

Phase 3: Containment, Eradication & Recovery (Stopping the Bleeding)

Once an incident is confirmed, the response must be swift and decisive, following a pre-defined plan.

Containment:** The first priority is to stop the bleeding. Isolate the compromised systems from the network to prevent the attacker from moving laterally.
Eradication:** Identify and remove every trace of the adversary from your network—every malicious file, every persistence mechanism, every compromised account.
**Recovery:** Restore the affected systems to a known-good state from clean, immutable backups. This is your last line of defense against a destructive ransomware attack.

Phase 4: Post-Incident Activity (The Most Important Step)

This is the phase where resilience is truly built, and it is the phase that most organizations neglect.

Lessons Learned:** Conduct a blameless post-mortem of the incident. The goal is not to assign blame, but to understand the truth.
**Root Cause Analysis:** What failed? Was it a missing patch? A misconfiguration? A gap in user training? A failure of a security tool? You must identify the root cause of every control failure.
**The Feedback Loop:** This is the most critical part of the entire framework. The findings from your root cause analysis must be translated into actionable tasks and fed directly back into the **Preparation** phase. The missed patch must be deployed. The misconfiguration must be fixed. The training must be updated. This is the continuous loop that makes a security program stronger after every attack.

Lead a Resilient Program: Building and managing a mature, cyclical IR program is a core function of a modern security leader. A certification like **CISM (Certified Information Security Manager)** provides the essential governance and risk management frameworks to build, manage, and communicate the value of such a program to the board.

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About the Author

CyberDudeBivash is a cybersecurity strategist with 15+ years in incident response, SOC operations, and cyber resilience, advising CISOs and boards across APAC. [Last Updated: October 07, 2025]

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