The answer is that the rule fails to exclude other legitimate directories like SysWOW64. This is the most likely cause of false positives because when you tune an analytics rule to reduce false positives in Microsoft Sentinel, you must account for all standard system paths that legitimately run encoded PowerShell commands, not just System32. SysWOW64 is the 32-bit compatibility layer on 64-bit systems and is a common source of legitimate encoded commands that would otherwise trigger the rule incorrectly. On the SC-200 exam, this scenario tests your ability to refine KQL queries for detection logic, specifically understanding that excluding only one path leaves gaps that generate noise. A common trap is assuming System32 is the only legitimate location, but the exam expects you to remember that SysWOW64 and other Windows directories must also be filtered. Memory tip: think “64-bit has a 32-bit twin” — if you exclude System32, always check for SysWOW64.
SC-200 Respond to security incidents Practice Question
This SC-200 practice question tests your understanding of respond to security incidents. 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.
Exhibit
Refer to the exhibit.
```json
{
"type": "Microsoft.SecurityInsights/alertRules",
"apiVersion": "2023-02-01-preview",
"properties": {
"displayName": "Anomalous PowerShell Execution",
"description": "Detects PowerShell executed from unusual locations.",
"severity": "High",
"query": "DeviceProcessEvents | where FileName == 'powershell.exe' | where InitiatingProcessCommandLine contains '-EncodedCommand' | where not(ProcessCommandLine contains 'C:\\Windows\\System32')"
}
}
```
You are testing this analytics rule. It should detect encoded PowerShell commands not from System32, but it is generating false positives. What is the most likely cause?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The rule does not exclude other legitimate paths like SysWOW64
Option B is correct because the rule does not filter out other legitimate directories like SysWOW64. Option A is wrong because the syntax is correct. Option C is wrong because the rule should not include System32. Option D is wrong because the query is fine.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
The severity should be Informational
Why it's wrong here
Severity is not the issue.
✗
The rule should also include System32
Why it's wrong here
Including System32 would cause more false negatives.
✗
The query syntax is incorrect
Why it's wrong here
Syntax is correct.
✓
The rule does not exclude other legitimate paths like SysWOW64
Why this is correct
SysWOW64 is also a legitimate path for PowerShell.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Static NAT maps one inside address to one outside address.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
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. NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated. 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 SC-200 question in full detail.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related SC-200 NAT questions on configuration and troubleshooting.
Respond to security incidents — This question tests Respond to security incidents — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: The rule does not exclude other legitimate paths like SysWOW64 — Option B is correct because the rule does not filter out other legitimate directories like SysWOW64. Option A is wrong because the syntax is correct. Option C is wrong because the rule should not include System32. Option D is wrong because the query is fine.
What should I do if I get this SC-200 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related SC-200 NAT questions on configuration and troubleshooting.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
About these practice questions
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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. Refer to the exhibit. You are deploying this analytics rule in Microsoft Sentinel. Which activity will trigger an alert?
easy
A.cmd.exe launching winword.exe
B.Any process creation event
C.Winword.exe execution
D.Any cmd.exe execution
✓ E.Word launching cmd.exe
Why E: The query detects when cmd.exe is created by winword.exe, indicating a potential macro-based attack. It does not look for other processes or parent processes.
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Question Discussion
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