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
\begin{tikzpicture}[node distance=2cm, every node/.style={rectangle, draw, minimum width=3cm, minimum height=1cm, align=center}] \node (detect) {GuardDuty Finding}; \node (isolate) [below of=detect] {Isolate Instance$Change SG)}; \node (snapshot) [right of=isolate, xshift=3cm] {Snapshot EBS Volume}; \node (forensic) [below of=snapshot] {Attach to Forensic\EC2 in Clean VPC}; \draw[->, thick] (detect) -- (isolate); \draw[->, thick] (isolate) -- (snapshot); \draw[->, thick] (snapshot) -- (forensic); \draw[dashed] (1.5, -0.5) rectangle (8, -4); \node at (4.75, -0.2) {Forensic Process}; \end{tikzpicture}
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.