The correct tables to join are DeviceProcessEvents and DeviceNetworkEvents. This is because the detection rule must correlate a suspicious PowerShell process event—specifically one using `-EncodedCommand`—with a subsequent outbound network connection to a malicious IP within a five-minute window. DeviceProcessEvents captures process creation details like command-line arguments, enabling the identification of encoded PowerShell commands, while DeviceNetworkEvents logs outbound connection metadata such as destination IP and port. Joining these two tables on DeviceId and a time range allows the query to confirm that the same device initiated both the encoded command and the malicious outbound connection. On the MS-102 exam, this scenario tests your ability to understand advanced hunting schema relationships and time-based correlation logic. A common trap is confusing DeviceProcessEvents with DeviceEvents or forgetting that DeviceNetworkEvents is required for network-level detection. Memory tip: think "Process first, Network second" to remember the join order and the five-minute window.
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 needs to create a custom detection rule in Microsoft 365 Defender that triggers when a suspicious PowerShell process (e.g., using -EncodedCommand) is detected on a device, and within 5 minutes, an outbound network connection to a known malicious IP address occurs. Which two advanced hunting tables must be joined?
DeviceProcessEvents logs process creation events (e.g., PowerShell), and DeviceNetworkEvents logs network connections. Joining these on DeviceId within a time range identifies the described pattern.
B
DeviceEvents and DeviceFileCertificateInfo
Why wrong: DeviceEvents covers various events but not process command lines, and DeviceFileCertificateInfo is for file signatures, not network connections.
C
IdentityLogonEvents and CloudAppEvents
Why wrong: These tables track identity logons and cloud app activities, not device-level process or network events.
D
EmailEvents and EmailAttachmentInfo
Why wrong: These tables are for email-related events, not device process or network activity.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
DeviceProcessEvents and DeviceNetworkEvents
The custom detection rule requires correlating a suspicious PowerShell process event with a subsequent outbound network connection to a malicious IP within a 5-minute window. DeviceProcessEvents contains process creation data (e.g., command line, process name) for detecting encoded PowerShell commands, while DeviceNetworkEvents logs network connections (destination IP, port, protocol). Joining these two tables on DeviceId and a time range allows the rule to identify the sequence of a process event followed by a network event from the same device.
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.
✓
DeviceProcessEvents and DeviceNetworkEvents
Why this is correct
DeviceProcessEvents logs process creation events (e.g., PowerShell), and DeviceNetworkEvents logs network connections. Joining these on DeviceId within a time range identifies the described pattern.
Related concept
Read the scenario before looking for a memorised answer.
✗
DeviceEvents and DeviceFileCertificateInfo
Why it's wrong here
DeviceEvents covers various events but not process command lines, and DeviceFileCertificateInfo is for file signatures, not network connections.
✗
IdentityLogonEvents and CloudAppEvents
Why it's wrong here
These tables track identity logons and cloud app activities, not device-level process or network events.
✗
EmailEvents and EmailAttachmentInfo
Why it's wrong here
These tables are for email-related events, not device process or network activity.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may confuse the purpose of DeviceEvents (which covers broader system events like driver loads or registry changes) with DeviceProcessEvents, or mistakenly think cloud or email tables are relevant to endpoint-based process and network correlation.
Trap categories for this question
Command / output trap
DeviceEvents covers various events but not process command lines, and DeviceFileCertificateInfo is for file signatures, not network connections.
Detailed technical explanation
How to think about this question
Under the hood, DeviceProcessEvents captures process creation events via ETW (Event Tracing for Windows) providers, including the full command line, which is critical for detecting -EncodedCommand. DeviceNetworkEvents uses Windows Filtering Platform (WFP) to log outbound connections, recording destination IP addresses. The join must use a time-bound condition (e.g., within 5 minutes after the process event) and a DeviceId match to ensure the sequence occurs on the same machine; a simple inner join without time filtering would miss the temporal correlation required for the detection rule.
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 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.
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: DeviceProcessEvents and DeviceNetworkEvents — The custom detection rule requires correlating a suspicious PowerShell process event with a subsequent outbound network connection to a malicious IP within a 5-minute window. DeviceProcessEvents contains process creation data (e.g., command line, process name) for detecting encoded PowerShell commands, while DeviceNetworkEvents logs network connections (destination IP, port, protocol). Joining these two tables on DeviceId and a time range allows the rule to identify the sequence of a process event followed by a network event from the same device.
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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