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.
A security analyst has identified a new malware sample with a specific SHA256 hash. The analyst needs to immediately block this file from executing on any managed endpoint across the organization, including prevention of future execution. Which Microsoft Defender for Endpoint capability should the analyst use?
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.
Why wrong: ASR rules block behaviors (e.g., macros, scripts) but not specific file hashes. They cannot be used to block a known malware hash.
B
Indicators (IoCs) for file hashes
Indicators for file hashes with action 'Block and Remediate' block execution of the specific file across all endpoints and remove it if found.
C
Custom detection rules via advanced hunting
Why wrong: Custom detection rules create alerts when query conditions are met, but they do not block execution automatically. They are reactive, not preventive.
D
Microsoft Defender Vulnerability Management
Why wrong: Vulnerability management identifies weaknesses and misconfigurations but does not block specific file hashes from executing.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Indicators (IoCs) for file hashes
Option B is correct because Indicators of Compromise (IoCs) for file hashes in Microsoft Defender for Endpoint allow an analyst to create a block indicator for a specific SHA256 hash. This action immediately prevents the file from executing on any managed endpoint and persists across reboots, effectively blocking future execution attempts. Unlike other capabilities, IoCs provide a direct, hash-based block that is enforced by the Microsoft Defender Antivirus engine at the point of execution.
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.
✗
Attack surface reduction (ASR) rules
Why it's wrong here
ASR rules block behaviors (e.g., macros, scripts) but not specific file hashes. They cannot be used to block a known malware hash.
✓
Indicators (IoCs) for file hashes
Why this is correct
Indicators for file hashes with action 'Block and Remediate' block execution of the specific file across all endpoints and remove it if found.
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.
✗
Custom detection rules via advanced hunting
Why it's wrong here
Custom detection rules create alerts when query conditions are met, but they do not block execution automatically. They are reactive, not preventive.
✗
Microsoft Defender Vulnerability Management
Why it's wrong here
Vulnerability management identifies weaknesses and misconfigurations but does not block specific file hashes from executing.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse ASR rules (which block behaviors) with IoC-based blocking (which blocks specific file hashes), or they assume custom detection rules can directly block execution when they only generate alerts or run limited response actions.
Detailed technical explanation
How to think about this question
When a block indicator for a SHA256 hash is created, Microsoft Defender for Endpoint distributes the indicator to all managed endpoints via the cloud-delivered protection service, and the Microsoft Defender Antivirus engine enforces the block at the file system level using the MpCmdRun.exe process. The block is applied before the file is executed, leveraging the kernel-mode filter driver (WdFilter.sys) to intercept file open and execute operations. In a real-world scenario, if a new ransomware variant with a known hash is identified, the analyst can create a block indicator within minutes, preventing execution across thousands of endpoints without requiring a signature update.
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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this MS-102 question in full detail.
Manage security and threats by using Microsoft Defender XDR — This question tests Manage security and threats by using Microsoft Defender XDR — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Indicators (IoCs) for file hashes — Option B is correct because Indicators of Compromise (IoCs) for file hashes in Microsoft Defender for Endpoint allow an analyst to create a block indicator for a specific SHA256 hash. This action immediately prevents the file from executing on any managed endpoint and persists across reboots, effectively blocking future execution attempts. Unlike other capabilities, IoCs provide a direct, hash-based block that is enforced by the Microsoft Defender Antivirus engine at the point of execution.
What should I do if I get this MS-102 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.
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 →
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 MS-102 practice question is part of Courseiva's free Microsoft 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 MS-102 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.