📘Cisco Certified CyberOps Associate (200-201 CBROPS)
🔷 1. What is an Incident Response Plan (IRP)?
An Incident Response Plan (IRP) is a documented strategy that explains:
- How an organization detects
- How it responds to
- How it recovers from
- Security incidents (like malware, intrusion, data breach)
It ensures that incidents are handled in a structured, fast, and effective way.
👉 The exam is based on the framework from NIST Special Publication 800-61 (Computer Security Incident Handling Guide).
🔷 2. Definition of a Security Incident
According to NIST:
A security incident is a violation or imminent threat of violation of security policies.
Common IT Examples:
- Malware infection on a server
- Unauthorized login attempts
- Data exfiltration detected in logs
- Suspicious network traffic
- Privilege escalation
🔷 3. Key Elements of an Incident Response Plan
NIST SP 800-61 defines four main phases:
🟢 1. Preparation
📌 Purpose:
Prepare the organization to respond effectively before an incident happens.
🔑 Key Activities:
1. Policies and Procedures
- Define how incidents should be handled
- Include escalation paths and decision-making rules
2. Incident Response Team (IRT / CSIRT)
- A dedicated team responsible for handling incidents
- Roles include:
- Incident handler
- Analyst
- Forensic investigator
- Manager
3. Tools and Resources
- Security tools such as:
- SIEM (Security Information and Event Management)
- IDS/IPS
- Antivirus/EDR
- Communication tools (secure channels)
4. Training and Awareness
- Train employees to:
- Recognize threats
- Report suspicious activity
5. Baselines and Documentation
- System baselines (normal behavior)
- Network diagrams
- Asset inventory
🧠 Exam Tip:
Preparation is about being ready BEFORE the incident occurs.
🟡 2. Detection and Analysis
📌 Purpose:
Identify and understand the incident.
🔑 Key Activities:
1. Detection Sources
- Alerts from:
- SIEM systems
- IDS/IPS
- Antivirus
- Logs (system, network, application)
- User reports
2. Event vs Incident
- Event → Any observable activity
- Incident → A confirmed security issue
👉 Not all events are incidents.
3. Triage (Initial Analysis)
- Determine:
- Is it a real threat?
- What is affected?
- How severe is it?
4. Incident Categorization
Classify the type of incident:
- Malware
- Unauthorized access
- Denial of Service (DoS)
- Data breach
5. Incident Prioritization
Based on:
- Impact (data loss, system downtime)
- Urgency (active attack vs past event)
6. Documentation
- Record everything:
- Time of detection
- Systems affected
- Actions taken
🧠 Exam Tip:
Detection phase focuses on:
👉 Identifying, validating, and understanding the incident
🔴 3. Containment, Eradication, and Recovery
This is the response phase where action is taken.
🔹 A. Containment
📌 Purpose:
Stop the attack from spreading.
Types:
- Short-term containment
- Disconnect infected system
- Block malicious IP
- Long-term containment
- Apply temporary fixes
- Isolate network segments
🔹 B. Eradication
📌 Purpose:
Remove the root cause of the incident.
Activities:
- Delete malware
- Remove unauthorized accounts
- Patch vulnerabilities
- Fix misconfigurations
🔹 C. Recovery
📌 Purpose:
Restore systems to normal operation.
Activities:
- Restore from backups
- Rebuild systems
- Monitor for reinfection
🔁 Validation:
- Ensure systems are:
- Clean
- Secure
- Fully operational
🧠 Exam Tip:
This phase is often tested as:
👉 Contain → Remove → Restore
🔵 4. Post-Incident Activity (Lessons Learned)
📌 Purpose:
Improve future response.
🔑 Key Activities:
1. Lessons Learned Meeting
- What happened?
- What worked?
- What failed?
2. Incident Report
- Full documentation of:
- Timeline
- Impact
- Actions taken
3. Update Security Controls
- Improve:
- Detection rules
- Policies
- Tools
4. Knowledge Sharing
- Train staff using findings
🧠 Exam Tip:
This phase is about:
👉 Improvement and prevention of future incidents
🔷 4. Supporting Elements of an IRP
In addition to the 4 phases, NIST highlights important supporting components:
🔸 1. Communication Plan
- Internal communication (teams, management)
- External communication (customers, legal, regulators)
🔸 2. Incident Classification Matrix
- Defines:
- Severity levels (Low, Medium, High, Critical)
- Response priorities
🔸 3. Escalation Procedures
- When to involve:
- Senior management
- Legal team
- External responders
🔸 4. Evidence Handling (Forensics)
Important Concept:
Chain of Custody
- Tracks how evidence is:
- Collected
- Stored
- Transferred
👉 Ensures evidence is valid for investigation.
🔸 5. Metrics and Reporting
Used to measure performance:
- Time to detect (MTTD)
- Time to respond (MTTR)
- Number of incidents
🔷 5. Incident Response Team (CSIRT)
Roles include:
- Incident handler
- Security analyst
- Forensic expert
- Management
- Legal advisor
Types of Teams:
- Internal CSIRT
- External response team
- Hybrid model
🔷 6. Automation in Incident Response
Modern environments use:
- SOAR (Security Orchestration, Automation, and Response)
Benefits:
- Faster response
- Reduced human error
- Automated containment actions
🔷 7. Common Challenges (Exam Insight)
- False positives (alerts that are not real threats)
- Lack of visibility
- Poor documentation
- Delayed response
- Inadequate training
🔷 8. Quick Exam Summary (Must Remember)
🔑 4 Phases (MOST IMPORTANT)
- Preparation
- Detection & Analysis
- Containment, Eradication & Recovery
- Post-Incident Activity
🔑 Key Concepts:
- Event vs Incident
- Triage
- Prioritization
- Containment types
- Chain of custody
- Lessons learned
🔚 Final Simple Explanation
An Incident Response Plan is a step-by-step guide that helps an organization:
- Get ready for attacks
- Detect and understand them
- Stop and fix them
- Learn and improve
