The answer is AWS CloudTrail. This is the correct choice because CloudTrail is the dedicated AWS service for recording all API activity, including the specific API calls that create IAM users with administrative privileges. Every action taken via the AWS Management Console, CLI, or SDK is logged as an event, capturing critical forensic details such as the source IP address, the identity of the IAM user who made the call, and the exact API action performed (e.g., CreateUser, AttachUserPolicy). On the Computer Hacking Forensic Investigator CHFI exam, this question tests your ability to map cloud forensic artifacts to the appropriate log source, a common scenario in incident response. A frequent trap is confusing CloudTrail with AWS Config or VPC Flow Logs, but remember: CloudTrail is for who did what and when, while Config tracks resource configuration changes. For a quick memory tip, think of CloudTrail as the “call log” for your AWS environment—if an API call was made, CloudTrail has the receipt.
CHFI Application, Email and Cloud Forensics Practice Question
This CHFI practice question tests your understanding of application, email and cloud forensics. 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.
In an AWS environment, a security analyst detects unusual API calls that created several IAM users with administrative privileges from an unfamiliar IP address. Which AWS service log should be examined first to identify the specific API calls and the IAM user that made them?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "first"
Why it matters: Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
AWS CloudTrail
AWS CloudTrail records all API calls made to the AWS environment, including IAM user creation. It provides details like the source IP, user identity, and the specific API action.
Key principle: Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
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 S3 access logs
Why it's wrong here
S3 access logs record requests to S3 buckets, not IAM API calls.
✗
AWS CloudWatch Logs
Why it's wrong here
CloudWatch Logs can aggregate logs but does not itself record API calls; it would contain CloudTrail logs if configured.
✓
AWS CloudTrail
Why this is correct
CloudTrail logs all AWS API calls, making it the primary source for investigating API activity.
Clue confirmation
The clue word "first" in the question point toward this answer.
Related concept
Authentication checks who the user is.
✗
AWS Config
Why it's wrong here
AWS Config tracks resource configuration changes, not API call details.
Common exam traps
Common exam trap: authentication is not authorization
Logging in proves the user can authenticate. It does not automatically mean the user is allowed to enter privileged or configuration mode. Watch for AAA authorization, privilege level and command authorization details.
Detailed technical explanation
How to think about this question
This kind of question is testing the difference between identity and permission. A user may successfully log in to a router because authentication is working, but still fail to enter configuration mode because authorization is missing, misconfigured or mapped to a lower privilege level.
KKey Concepts to Remember
Authentication checks who the user is.
Authorization controls what the user is allowed to do after login.
Privilege levels affect access to EXEC and configuration commands.
AAA, TACACS+ and RADIUS can separate login success from command access.
TExam Day Tips
→Do not assume successful login means full administrative access.
→Look for words such as cannot enter configuration mode, privilege level, authorization or command access.
→Separate login problems from permission problems before choosing the answer.
Key takeaway
Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
Real-world example
How this comes up in practice
A junior network technician can log in to a core router but cannot reach the enable prompt or configuration mode. The AAA server is authenticating the login — but the authorisation policy only grants privilege level 1, not 15. Authentication (who you are) is working; authorisation (what you can do) is not.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this CHFI question in full detail.
Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related CHFI questions on access control and AAA configuration.
Application, Email and Cloud Forensics — This question tests Application, Email and Cloud Forensics — Authentication checks who the user is..
What is the correct answer to this question?
The correct answer is: AWS CloudTrail — AWS CloudTrail records all API calls made to the AWS environment, including IAM user creation. It provides details like the source IP, user identity, and the specific API action.
What should I do if I get this CHFI question wrong?
Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related CHFI questions on access control and AAA configuration.
Are there clue words in this question I should notice?
Yes — watch for: "first". Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
What is the key concept behind this question?
Authentication checks who the user is.
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 cloud forensic investigation, an analyst needs to identify who deleted an S3 bucket in an AWS environment. Which AWS service log should the analyst examine to find the API call and the associated IAM user or role?
medium
✓ A.AWS CloudTrail
B.Amazon S3 server access logs
C.AWS Config
D.Amazon CloudWatch Logs
Why A: AWS CloudTrail records API calls made to AWS services, including S3 bucket deletion, along with the identity of the caller.
Last reviewed: Jun 21, 2026
Question Discussion
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This CHFI practice question is part of Courseiva's free EC-Council 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 CHFI exam.
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