The answer is a user logging into multiple servers using a compromised account, as Microsoft Defender for Identity alerts on this activity as a classic lateral movement technique. This is because lateral movement relies on an attacker pivoting from one compromised host to another, often using stolen credentials to authenticate across multiple machines, which MDI detects through abnormal remote logon patterns. On the MS-102 exam, this question tests your ability to distinguish lateral movement from other attack types like brute force, privilege escalation, or DCSync—a common trap is confusing password spray or brute force with lateral movement, but remember that lateral movement always involves moving between hosts, not just guessing credentials. Think of it as the "spider web" attack: the attacker spins from one server to another, and MDI catches the threads.
MS-102 Practice Question: Manage security and threats by using Microsoft Defender XDR
This MS-102 practice question tests your understanding of manage security and threats by using microsoft defender xdr. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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.
You are configuring Microsoft Defender for Identity (MDI) to monitor for lateral movement attacks. Which of the following activities would MDI alert on as a potential lateral movement?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
A user logging into multiple servers using a compromised account.
Option D is correct because using a compromised account to connect to multiple machines is a classic lateral movement technique. Option A is wrong because brute force is a separate attack. Option B is wrong because privilege escalation is different. Option C is wrong because DCSync is a domain replication attack. Option E is wrong because password spray is a type of brute force.
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.
✓
A user logging into multiple servers using a compromised account.
Why this is correct
Multiple remote logons from a compromised account indicate lateral movement.
Related concept
Authentication checks who the user is.
✗
A user performing a DCSync attack.
Why it's wrong here
DCSync is a domain privilege escalation technique.
✗
A user conducting a password spray attack.
Why it's wrong here
Password spray is a credential attack, not lateral movement.
✗
A user executing a privilege escalation tool on their workstation.
Why it's wrong here
Privilege escalation is not lateral movement.
✗
A user performing a brute force attack on a domain controller.
Why it's wrong here
Brute force is not lateral movement; it's credential access.
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 company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this MS-102 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 MS-102 questions on access control and AAA configuration.
Manage security and threats by using Microsoft Defender XDR — This question tests Manage security and threats by using Microsoft Defender XDR — Authentication checks who the user is..
What is the correct answer to this question?
The correct answer is: A user logging into multiple servers using a compromised account. — Option D is correct because using a compromised account to connect to multiple machines is a classic lateral movement technique. Option A is wrong because brute force is a separate attack. Option B is wrong because privilege escalation is different. Option C is wrong because DCSync is a domain replication attack. Option E is wrong because password spray is a type of brute force.
What should I do if I get this MS-102 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 MS-102 questions on access control and AAA configuration.
What is the key concept behind this question?
Authentication checks who the user is.
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