The answer is to launch a test instance from the AMI in an isolated VPC and run Amazon Inspector. This approach is correct because it allows you to analyze the AMI for malicious software in a sandboxed environment, preventing any potential compromise from spreading to production resources while Amazon Inspector performs automated vulnerability scans against the running instance. Amazon Inspector leverages a knowledge base of common vulnerabilities and exposures (CVEs) and CIS benchmarks to detect misconfigurations and embedded threats, making it the most thorough method for analyzing a custom AMI without risk. On the AWS Certified Security Specialty SCS-C02 exam, this question tests your understanding of safe forensic analysis and the distinction between static AMI inspection (like using the AWS Systems Manager or manual file review) versus dynamic runtime assessment. A common trap is choosing to inspect the AMI directly in the console or using a snapshot analysis tool, which misses runtime behaviors. Memory tip: Isolate then Inspect — always launch in a sandbox before scanning.
SCS-C02 Threat Detection and Incident Response Practice Question
This SCS-C02 practice question tests your understanding of threat detection and incident response. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A security engineer is investigating a potential compromise of an EC2 instance. The instance was launched from a custom AMI. The engineer needs to determine if the AMI itself contains malicious software. Which approach provides the most thorough analysis without risking the production environment?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Launch a test instance from the AMI in an isolated VPC and run Amazon Inspector.
Option A is correct because launching a test instance from the AMI in an isolated VPC allows you to run Amazon Inspector, which performs automated vulnerability assessments and network reachability checks against the instance. This approach provides a thorough analysis of the AMI's software and configuration without exposing the production environment to any potential malicious activity. Amazon Inspector uses a knowledge base of common vulnerabilities and exposures (CVEs) and CIS benchmarks to identify security issues, making it effective for detecting malicious software embedded in the AMI.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
Launch a test instance from the AMI in an isolated VPC and run Amazon Inspector.
Why this is correct
Isolated environment prevents impact; Inspector scans for vulnerabilities and CVEs.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use AWS Systems Manager to run a compliance scan on the running instance.
Why it's wrong here
Running instance may be compromised; scan could be inaccurate.
✗
Create an EBS snapshot from the AMI and scan the snapshot with Amazon Detective.
Why it's wrong here
Detective does not scan snapshots; it analyzes security data.
✗
Launch a test instance from the AMI in an isolated VPC and analyze its behavior.
Why it's wrong here
Good but lacks automated vulnerability scanning.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may choose Option D (behavioral analysis) because it seems more hands-on and thorough, but they overlook that Amazon Inspector provides a more systematic, automated, and comprehensive scan for known vulnerabilities and misconfigurations, which is the most efficient way to identify malicious software in an AMI without risking the production environment.
Detailed technical explanation
How to think about this question
Amazon Inspector uses an agent-based or agentless assessment model; for EC2 instances, it installs an agent that collects system configuration and software inventory, then compares it against a continuously updated database of CVEs and CIS benchmarks. The isolated VPC ensures that any malicious activity from the test instance does not affect production resources, while Inspector's network reachability checks can identify unintended open ports or vulnerable services. In a real-world scenario, an attacker might embed a backdoor in an AMI that only activates under specific conditions; Inspector's static analysis of installed packages and configurations can detect such threats without needing to trigger the malicious behavior.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A healthcare organisation deploys an application with a public-facing web tier and a private database tier. The database subnet has no public IP and only accepts connections from the web tier's security group. Questions like this test whether you can design cloud network isolation using VNets/VPCs, subnets, and security group rules.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Threat Detection and Incident Response — This question tests Threat Detection and Incident Response — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Launch a test instance from the AMI in an isolated VPC and run Amazon Inspector. — Option A is correct because launching a test instance from the AMI in an isolated VPC allows you to run Amazon Inspector, which performs automated vulnerability assessments and network reachability checks against the instance. This approach provides a thorough analysis of the AMI's software and configuration without exposing the production environment to any potential malicious activity. Amazon Inspector uses a knowledge base of common vulnerabilities and exposures (CVEs) and CIS benchmarks to identify security issues, making it effective for detecting malicious software embedded in the AMI.
What should I do if I get this SCS-C02 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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