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Exam SC-200 Topic 2 Question 351 Discussion

Actual exam question for Microsoft's SC-200 exam
Question #: 351
Topic #: 2
You have a Microsoft 365 E5 subscription.
You plan to perform cross-d omain investigations by using Microsoft 365 Defender.
You need to create an advanced hunting query to identify devices affected by a malicious email attachment.
How should you complete the query? To answer, select the appropriate options in the answer ar ea.
NOTE: Each correct selection is worth one point.

Suggested Answer:


Explanation:

In Microsoft 365 Defender advanced hunting, email attachments are recorded in EmailAttachmentInfo and endpoint file activity is recorded in DeviceFileEvents . To correlate a malicious attachment to devices where the same file was observed, you join on the file hash ( SHA256 ) . The hunting guidance specifies using EmailAttachmentInfo to filter by sender and to ensure the attachment has a hash ( isnotempty(SHA256) ).
Then, a join with DeviceFileEvents on SHA256 links the email-borne file to endpoint observations.
Before joining, i t's best practice to reduce the right-hand dataset with project to only needed fields (e.g., FileName , SHA256 , DeviceName , DeviceId , Timestamp ) to improve performance and limit data volume.
After the join, use project again to shape the final result set fo r investigation, including timeline and pivot identifiers: Timestamp , FileName , SHA256 , DeviceName , DeviceId , plus email context such as NetworkMessageId , SenderFromAddress , and RecipientEmailAddress .
Therefore, the correct operator sequence is: join (subq uery over DeviceFileEvents with project ) on SHA256
, then final project of the incident-relevant columns.

by Veromca at Jul 26, 2026, 08:59 PM

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