AWS Certified Security - Specialty: Unit 2 Incident Response Curriculum Overview
Unit 2: Incident Response
Unit 2: Incident Response Curriculum Overview
This curriculum overview covers the essential strategies, tools, and AWS services required to design, test, and execute incident response (IR) plans. Based on the SCS-C03 exam objectives, this unit focuses on shifting from reactive manual processes to proactive, automated security orchestration.
Prerequisites
Before beginning this unit, students should have a firm grasp of the following concepts:
- AWS Security Foundations: Understanding the Shared Responsibility Model.
- Identity & Access Management (IAM): Proficiency in creating roles, trust policies, and service-linked roles.
- Unit 1 (Detection) Mastery: Familiarity with logging sources (CloudTrail, VPC Flow Logs, DNS Logs) and basic monitoring tools (CloudWatch, GuardDuty).
- Basic Scripting: Fundamental knowledge of Python or JSON/YAML for understanding AWS Lambda and Step Functions.
Module Breakdown
| Module ID | Module Title | Description | Difficulty |
|---|---|---|---|
| IR-2.1 | IR Planning & Preparation | Designing runbooks and setting up forensic accounts. | Intermediate |
| IR-2.2 | Detection & Evidence Collection | Searching, correlating, and storing forensic artifacts. | Advanced |
| IR-2.3 | Containment & Eradication | Isolating affected resources and minimizing blast radius. | Intermediate |
| IR-2.4 | Automated Remediation | Using SSM, Lambda, and Step Functions for SOAR. | Advanced |
| IR-2.5 | Post-Incident & Root Cause | Conducting deep-dive investigations with Amazon Detective. | Intermediate |
Learning Objectives per Module
IR-2.1: Design and Test an Incident Response Plan
- Develop Incident Response Plans and Runbooks using AWS Systems Manager OpsCenter.
- Implement authorization controls (IAM Roles Anywhere, Attribute-Based Access Control) for emergency response teams.
- Utilize AWS Fault Injection Service (FIS) and AWS Resilience Hub to validate plan effectiveness through controlled simulations.
IR-2.2: Respond to Security Events
- Capture and store system/application logs as immutable forensic artifacts.
- Correlate events across services to determine the scope of impact.
- Validate findings from GuardDuty, Macie, and Security Hub to filter "noise" from actual threats.
IR-2.3: Containment and Eradication
- Implement Network Containment Controls (Security Group isolation, NACL updates).
- Execute resource recovery via AWS Backup or Amazon S3 versioning.
- Manage a dedicated Forensic AWS Account for isolated analysis.
IR-2.4: Automation and Orchestration
- Build automated remediation pipelines using AWS Step Functions and Lambda.
- Deploy the Automated Forensics Orchestrator for Amazon EC2.
- Configure Amazon Application Recovery Controller for high-availability failover.
[!TIP] Automation (SOAR) is a key differentiator in the SCS-C03 exam. Focus on how AWS Systems Manager (SSM) can automate manual tasks across large fleets of EC2 instances.
Visual Anchors
Incident Response Lifecycle
Forensic Isolation Logic
Success Metrics
To demonstrate mastery of Unit 2, the learner must be able to:
- Draft a Functional Runbook: Create an AWS Systems Manager Automation document that can isolate an EC2 instance and snapshot its volumes.
- Conduct Root Cause Analysis: Successfully navigate Amazon Detective to identify the IAM entity responsible for a suspicious API call.
- Implement SOAR: Configure a CloudWatch Event Rule that triggers a Lambda function to revoke an IAM user's active sessions upon a high-severity GuardDuty alert.
- Validate Compliance: Use AWS Config to remediate a non-compliant resource (e.g., an unencrypted S3 bucket) automatically.
Real-World Application
Why This Matters in Careers
- SOC Analyst / Incident Responder: Modern security teams no longer manually log into consoles. They use the tools learned here to manage hundreds of alerts per hour via automation.
- Cloud Security Architect: Designing "Self-Healing" infrastructures is a high-value skill that reduces a company's Mean Time to Remediate (MTTR).
Case Study: Ransomware Containment
In a real-world scenario, if an EC2 instance is detected communicating with a known Command & Control (C&C) server, the skills in this unit allow an engineer to:
- Automatically trigger a VPC ingress/egress lock.
- Create a forensic clone of the memory and disk.
- Notify the security team via SNS with a full context report from Security Hub.
- Prevent the spread to the rest of the organization within seconds.
[!WARNING] Failure to automate IR in the cloud often leads to catastrophic data loss, as manual reaction times are typically slower than automated attack scripts.