Welcome to the Phishing Incident Response Playbook for . This document provides a comprehensive and actionable framework to effectively manage, detect, and respond to the persistent threat of phishing attacks.
Aligned with industry standards such as NIST SP 800-61, this playbook serves as a central guide for minimizing the impact of phishing attempts, ensuring swift recovery, and proactively strengthening our overall cybersecurity posture.
- Establish a consistent framework for handling phishing incidents.
- Minimize operational impact, financial loss, and data exposure.
- Define clear roles for the Computer Security Incident Response Team (CSIRT).
- Cover multiple social engineering vectors: Email Phishing, Spear Phishing, Whaling, Vishing, and Smishing.
This playbook is designed for all personnel involved in incident management and organizational security:
- Security Operations Center (SOC) Analysts: The first line of defense and triage.
- Incident Response Team (IRT): Responsible for in-depth analysis, containment, and eradication.
- IT Administrators: Tasked with technical controls, network isolation, and system recovery.
- Key Stakeholders: Senior Management, Legal Counsel, Human Resources, and Public Relations for compliance and communication.
Details the characteristics and delivery methods of various attacks. It helps responders identify observable signs (e.g., suspicious URLs, urgent language) and symptoms (e.g., unusual login attempts, unauthorized software).
Outlines the use of monitoring tools (Anti-Phishing software, SIEM, DNS analysis) alongside user reporting. Includes guidelines for examining Indicators of Compromise (IoCs) such as email headers, malicious attachments, and anomalous network traffic.
Provides a matrix for categorizing incidents based on severity, ensuring the security team allocates resources effectively.
| Severity Level | Number of Users Affected | Data Sensitivity | Potential Impact | Indicators of Compromise | Target |
|---|---|---|---|---|---|
| High | Multiple users | Highly Confidential / Critical | Critical service outage, Data breach | Confirmed | Executives, High Value |
| Medium | Several users | Confidential / Proprietary | Significant disruption | Suspected | General Employees |
| Low | Single user | Public / Internal | Minor disruption | None | General Employees |
Step-by-step actions for handling an active threat across the incident lifecycle:
- Immediate Actions: Initial assessment, scope determination, and emergency credential resets.
- Containment: Blocking malicious sources, quarantining emails, and isolating compromised systems.
- Investigation: Forensic data collection, compromise assessment, and root cause analysis.
- Eradication & Recovery: Removing malicious content, restoring systems from clean backups, and updating security controls.
Defines strict internal and external escalation protocols. Ensures that management, affected users, partners, and regulatory authorities are informed accurately, timely, and in compliance with data privacy laws.
Mandates post-incident reviews, playbook updates, and ongoing security awareness training. This ensures the organization adapts to evolving threats based on lessons learned from past incidents and simulated drills.
To streamline the response process during high-stress situations, the playbook includes pre-approved, ready-to-use resources:
- Internal Communication Templates: Drafts for Management updates and general User alerts.
- External Communication Templates: Drafts for Providers, Regulatory Authorities, and affected Customers.
- Chain of Custody Form: A printable log to track the handling of digital evidence and maintain its legal integrity.
Note: This playbook is a living document. It will be reviewed and updated regularly to adapt to the evolving threat landscape and organizational needs.