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 administrator needs to block executable files (e.g., .exe, .ps1) from running from the %TEMP% folder on Windows devices to prevent common malware execution. Which attack surface reduction (ASR) rule should be enabled?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Block executable files from running unless they meet a prevalence, age, or trusted list criterion
ASR rule 'Block executable files from running unless they meet a prevalence, age, or trusted list criterion' (GUID: 01443614-cd74-433a-b99e-2ecdc07bfc25) is designed specifically to block executables (including .exe, .ps1, .scr, .dll) from launching from locations like %TEMP%, %APPDATA%, and the Windows folder, which are common malware staging areas. This rule uses cloud-delivered reputation (prevalence and age) and a Microsoft-managed trusted list to allow legitimate files while blocking unknown or suspicious ones, directly addressing the requirement to prevent malware execution from %TEMP%.
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.
✓
Block executable files from running unless they meet a prevalence, age, or trusted list criterion
Why this is correct
This rule blocks executables in common writable folders if they are not prevalent or trusted, covering %TEMP%.
Related concept
Read the scenario before looking for a memorised answer.
✗
Block executable content from email client and webmail
Why it's wrong here
This rule blocks executables downloaded via email or webmail, not from local folders like %TEMP%.
✗
Block Office applications from creating child processes
Why it's wrong here
This rule prevents Office apps from spawning child processes; it does not block execution from %TEMP%.
✗
Block credential stealing from the Windows local security authority subsystem (lsass.exe)
Why it's wrong here
This rule protects against credential theft, not executable execution.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse ASR rules by their generic names — they might pick 'Block executable content from email client and webmail' because it mentions 'executable content,' but the question specifically targets execution from the %TEMP% folder, not email delivery.
Detailed technical explanation
How to think about this question
Under the hood, this ASR rule evaluates each executable's reputation via Microsoft's cloud intelligence: files with high prevalence (seen on many devices), sufficient age (older than a few days), or a valid Microsoft digital signature are allowed; otherwise, they are blocked. In a real-world scenario, an attacker drops a never-before-seen .ps1 script into %TEMP% via a browser download — this rule would block its execution because the script lacks prevalence and age, even if Windows Defender Antivirus hasn't yet detected it as malware. Note that this rule can be set to 'Audit' mode first to test impact before enabling 'Block' mode.
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: Block executable files from running unless they meet a prevalence, age, or trusted list criterion — ASR rule 'Block executable files from running unless they meet a prevalence, age, or trusted list criterion' (GUID: 01443614-cd74-433a-b99e-2ecdc07bfc25) is designed specifically to block executables (including .exe, .ps1, .scr, .dll) from launching from locations like %TEMP%, %APPDATA%, and the Windows folder, which are common malware staging areas. This rule uses cloud-delivered reputation (prevalence and age) and a Microsoft-managed trusted list to allow legitimate files while blocking unknown or suspicious ones, directly addressing the requirement to prevent malware execution from %TEMP%.
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.
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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