The answer is to detach the instance from the Auto Scaling group, isolate it by changing security groups, and use AWS Systems Manager Run Command to execute a memory acquisition tool. This approach is correct because it preserves volatile memory evidence by preventing the Auto Scaling group from automatically terminating or replacing the compromised instance during the investigation, while the security group change isolates network traffic to avoid further compromise. Systems Manager Run Command then allows you to run a memory acquisition tool like LiME or AVML without shutting down the instance, which would destroy the memory image. On the AWS Certified Security Specialty SCS-C02 exam, this scenario tests your understanding of incident response procedures for compromised EC2 Linux systems, specifically the need to capture a memory image before any shutdown or reboot. A common trap is choosing to take a snapshot or terminate the instance, which loses volatile data. Memory tip: think "Detach, Isolate, Capture" — the three steps to preserve the memory image of a compromised EC2 Linux instance.
SCS-C02 Threat Detection and Incident Response Practice Question
This SCS-C02 practice question tests your understanding of threat detection and incident response. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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.
During an incident response, a security engineer needs to capture a memory image of a compromised Amazon EC2 instance running Linux. The instance is in a production Auto Scaling group. Which approach is BEST?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "best"
Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Use AWS CloudFormation to create a new stack with a forensic instance and copy the compromised instance's data.
Why wrong: Does not capture memory.
B
Terminate the instance immediately to prevent further damage and launch a replacement.
Why wrong: Destroys volatile evidence.
C
Detach the instance from the Auto Scaling group, isolate it by changing security groups, and use AWS Systems Manager Run Command to execute a memory acquisition tool.
Preserves memory and allows forensic collection.
D
Take a snapshot of the EBS volumes and attach them to a forensic instance to analyze memory.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Detach the instance from the Auto Scaling group, isolate it by changing security groups, and use AWS Systems Manager Run Command to execute a memory acquisition tool.
Option C is correct because it preserves the volatile memory evidence by detaching the instance from the Auto Scaling group (preventing replacement) and isolating it via security group changes, then using AWS Systems Manager Run Command to execute a memory acquisition tool like LiME or AVML. This approach captures the memory image without shutting down the instance, which would destroy the evidence, and avoids the risk of the Auto Scaling group automatically terminating or replacing the instance during the investigation.
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.
✗
Use AWS CloudFormation to create a new stack with a forensic instance and copy the compromised instance's data.
Why it's wrong here
Does not capture memory.
✗
Terminate the instance immediately to prevent further damage and launch a replacement.
Why it's wrong here
Destroys volatile evidence.
✓
Detach the instance from the Auto Scaling group, isolate it by changing security groups, and use AWS Systems Manager Run Command to execute a memory acquisition tool.
Why this is correct
Preserves memory and allows forensic collection.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Take a snapshot of the EBS volumes and attach them to a forensic instance to analyze memory.
Why it's wrong here
EBS snapshots do not capture memory.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse disk forensics (EBS snapshots) with memory forensics, assuming a snapshot captures RAM, or they prioritize immediate containment (termination) over evidence preservation, which violates the core incident response principle of 'preserve before remediate'.
Detailed technical explanation
How to think about this question
Memory acquisition on Linux instances typically uses tools like LiME (Linux Memory Extractor) or AVML (Acquire Volatile Memory for Linux), which load a kernel module to dump RAM to a file or stdout. AWS Systems Manager Run Command can execute these tools via the SSM Agent, which must be installed and have outbound internet access (or a VPC endpoint) to receive commands. The memory dump file can then be uploaded to Amazon S3 for analysis, ensuring the chain of custody is maintained. A key subtlety is that the instance must remain powered on and the SSM Agent must have permissions (via an IAM role) to execute the command and write to S3.
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
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
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: Detach the instance from the Auto Scaling group, isolate it by changing security groups, and use AWS Systems Manager Run Command to execute a memory acquisition tool. — Option C is correct because it preserves the volatile memory evidence by detaching the instance from the Auto Scaling group (preventing replacement) and isolating it via security group changes, then using AWS Systems Manager Run Command to execute a memory acquisition tool like LiME or AVML. This approach captures the memory image without shutting down the instance, which would destroy the evidence, and avoids the risk of the Auto Scaling group automatically terminating or replacing the instance during the investigation.
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.
Are there clue words in this question I should notice?
Yes — watch for: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. During a security incident, a forensic investigator needs to capture the memory of a running EC2 instance without shutting it down. Which AWS feature should be used?
medium
A.Amazon CloudWatch agent
✓ B.EC2 Rescue for Linux or Systems Manager Run Command with a memory dump script
C.AWS CloudTrail
D.Amazon EBS snapshot
Why B: Option B is correct because EC2 Rescue for Linux (via Systems Manager Run Command) includes a built-in script that can capture a full memory dump from a running EC2 instance without requiring a shutdown. This is essential for forensic analysis to preserve volatile data like running processes, network connections, and kernel structures. The script leverages the Linux 'vmcore' or 'LiME' (Linux Memory Extractor) tool to safely extract memory contents while the instance remains operational.
Variation 2. During an incident response, a security team needs to capture a memory dump of an Amazon EC2 instance running Linux. What is the recommended approach?
medium
✓ A.Use AWS Systems Manager Run Command to run a script that extracts memory using LiME.
B.Use Amazon Inspector to collect memory dumps.
C.Stop the instance and create an EBS snapshot for memory analysis.
D.Use the EC2 console to take a screenshot and capture memory from the hypervisor.
Why A: Option A is correct because AWS Systems Manager Run Command allows you to execute a script on a running EC2 instance without needing SSH access, and LiME (Linux Memory Extractor) is a trusted tool for capturing volatile memory. This approach preserves the memory state for forensic analysis while maintaining the instance's running state, which is critical for incident response.
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
This SCS-C02 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the SCS-C02 exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.