The answer is AWS Step Functions, Amazon EventBridge, and AWS Lambda. This trio works together because GuardDuty findings are automatically sent to EventBridge as events, where a rule can be configured to match specific finding types and trigger a Lambda function for immediate response. For more complex remediation that requires sequential steps, branching logic, or error handling, Step Functions orchestrates multiple Lambda functions and other services into a cohesive workflow. On the AWS Certified Security Specialty SCS-C02 exam, this scenario tests your understanding of event-driven security automation—a common trap is selecting AWS Config or Systems Manager instead of EventBridge, but remember that GuardDuty natively publishes findings only to EventBridge. A helpful memory tip: think of EventBridge as the “listener,” Lambda as the “doer,” and Step Functions as the “orchestrator” for any multi-step remediation.
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 company wants to implement automated remediation of security findings from Amazon GuardDuty. Which THREE AWS services can be used together to create an automated response workflow? (Select THREE.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Amazon CloudWatch Events (EventBridge)
Amazon GuardDuty sends findings to Amazon CloudWatch Events (EventBridge) as events. You can configure an EventBridge rule to match specific GuardDuty findings and trigger an AWS Lambda function for automated remediation. AWS Step Functions can orchestrate complex remediation workflows involving multiple Lambda functions or other AWS services, providing retry logic and error handling.
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.
✓
Amazon CloudWatch Events (EventBridge)
Why this is correct
Receives GuardDuty findings and triggers Lambda or Step Functions.
Related concept
Read the scenario before looking for a memorised answer.
✓
AWS Lambda
Why this is correct
Executes remediation actions, such as modifying security groups or isolating instances.
Related concept
Read the scenario before looking for a memorised answer.
✓
AWS Step Functions
Why this is correct
Orchestrates multi-step remediation workflows.
Related concept
Read the scenario before looking for a memorised answer.
✗
Amazon SQS
Why it's wrong here
SQS could be used for decoupling but is not a primary service in this workflow.
✗
AWS Config
Why it's wrong here
AWS Config is for configuration compliance, not for direct automation of GuardDuty findings.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often select Amazon SQS or AWS Config because they are associated with event-driven architectures or compliance, but they are not the core services used in the standard GuardDuty automated remediation pattern, which relies on EventBridge, Lambda, and Step Functions.
Detailed technical explanation
How to think about this question
GuardDuty findings are published as events to the default event bus in Amazon EventBridge. An EventBridge rule can filter on the 'source' as 'aws.guardduty' and specific 'detail.type' values (e.g., 'UnauthorizedAccess:EC2/SSHBruteForce'). The rule target can be a Lambda function that performs actions like modifying security group rules or isolating an EC2 instance. Step Functions can coordinate multi-step remediation, such as verifying the finding, quarantining the resource, and sending notifications, with built-in error handling and wait states.
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 cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
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: Amazon CloudWatch Events (EventBridge) — Amazon GuardDuty sends findings to Amazon CloudWatch Events (EventBridge) as events. You can configure an EventBridge rule to match specific GuardDuty findings and trigger an AWS Lambda function for automated remediation. AWS Step Functions can orchestrate complex remediation workflows involving multiple Lambda functions or other AWS services, providing retry logic and error handling.
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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