The correct approach is to create a CloudWatch Events rule (now part of Amazon EventBridge) that matches the StopLogging or UpdateTrail API calls and sends an alert. This works because CloudTrail itself logs all control plane API calls to its own trails, and EventBridge can filter on those specific events in real time, triggering an SNS notification or Lambda function the moment a trail is altered. On the AWS Certified Security Specialty SCS-C02 exam, this tests your understanding of monitoring the monitoring layer—a common trap is to suggest using CloudTrail logs with Athena or S3 event notifications, which are reactive and not immediate. Remember that detecting CloudTrail trail modifications in real-time requires an event-driven pattern, not a query-based one. Memory tip: think "EventBridge catches the trail change before the log hits S3."
SCS-C02 Security Logging and Monitoring Practice Question
This SCS-C02 practice question tests your understanding of security logging and monitoring. 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 company uses AWS CloudTrail and wants to ensure that any modification to the trail itself is detected immediately. What should be done?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "immediately / without restart"
Why it matters: Time or reboot constraint — the correct answer must take effect right away without requiring a reboot or reload.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Create a CloudWatch Events rule that matches the StopLogging or UpdateTrail API calls and sends an alert
Option C is correct because CloudWatch Events (now part of Amazon EventBridge) can be configured with a rule that matches specific API calls like StopLogging or UpdateTrail via CloudTrail. When such an API call is made, the rule triggers an action such as sending an SNS notification or invoking a Lambda function, enabling immediate detection of trail modifications. This approach directly monitors the control plane operations that alter the trail's configuration.
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.
✗
Configure Amazon GuardDuty to monitor for trail modifications
Why it's wrong here
GuardDuty does not monitor CloudTrail configuration.
✗
Enable CloudTrail Insights to detect unusual activity
Why it's wrong here
Insights detects unusual API activity, not configuration changes.
✓
Create a CloudWatch Events rule that matches the StopLogging or UpdateTrail API calls and sends an alert
Why this is correct
CloudWatch Events can trigger on CloudTrail management events.
Clue confirmation
The clue word "immediately / without restart" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Enable S3 event notifications on the trail's S3 bucket
Why it's wrong here
This would notify of log delivery, not trail modification.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse monitoring the trail's log files (S3 events) with monitoring the trail's configuration (CloudTrail API calls), leading them to choose Option D instead of the correct CloudWatch Events approach.
Detailed technical explanation
How to think about this question
Under the hood, CloudTrail management events are delivered to CloudTrail itself, and a CloudWatch Events rule uses event pattern matching on the 'source': 'aws.cloudtrail' and 'eventName' fields such as 'StopLogging' or 'UpdateTrail'. This rule can trigger an SNS topic to send an email or SMS alert within seconds of the API call, providing near-real-time detection. In a real-world scenario, an attacker might disable CloudTrail to cover their tracks, and this rule ensures that the security team is immediately notified before the trail is fully disabled.
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 media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
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.
Security Logging and Monitoring — This question tests Security Logging and Monitoring — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Create a CloudWatch Events rule that matches the StopLogging or UpdateTrail API calls and sends an alert — Option C is correct because CloudWatch Events (now part of Amazon EventBridge) can be configured with a rule that matches specific API calls like StopLogging or UpdateTrail via CloudTrail. When such an API call is made, the rule triggers an action such as sending an SNS notification or invoking a Lambda function, enabling immediate detection of trail modifications. This approach directly monitors the control plane operations that alter the trail's configuration.
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: "immediately / without restart". Time or reboot constraint — the correct answer must take effect right away without requiring a reboot or reload.
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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