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Add rule: "Suspicious VHD driver loading activities - Possible phishing/malware via VHD files" #6

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Add rule: "Suspicious VHD driver loading activities - Possible phishing/malware via VHD files" #6

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76f1df9
Create Suspicious VHD driver loading activities
tommytri Jun 14, 2025
0b88109
Rename Suspicious VHD driver loading activities to Suspicious VHD dri…
tommytri Jun 14, 2025
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17 changes: 17 additions & 0 deletions DefenderXDR/Suspicious VHD driver loading activities.kql
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// Update your monitored applications and your filter to match with your organization's businesses
let monitoredApplications = dynamic(["outlook.exe", "firefox.exe", "chrome.exe", "msedge.exe", "opera.exe", "coccoc.exe", "brave.exe", "chromium.exe","discord.exe", "viber.exe", "zalo.exe", "line.exe", "telegram.exe"]);
let fileCreationEvents = DeviceFileEvents
| where FileName endswith ".img" or FileName endswith ".iso" or FileName endswith ".vhd"
| where InitiatingProcessFileName in (monitoredApplications)
| project DeviceId, DeviceName, InitiatingProcessFileName,ActionType, FileCreationTimeName=FileName, FileCreationTimestamp=Timestamp,ReportId;
let driverLoadEvents = DeviceEvents
| where ActionType == "DriverLoad"
| where FileName in ("cdfs.sys", "fsdepends.sys", "vhdmp.sys")
| project DeviceId, DeviceName, ActionType, DriverLoadFileName=FileName, DriverLoadTimestamp=Timestamp;
fileCreationEvents
| join kind=inner (
driverLoadEvents
) on DeviceId
| where DriverLoadTimestamp > FileCreationTimestamp and DriverLoadTimestamp <= FileCreationTimestamp + 30m
| project DeviceId, DeviceName, InitiatingProcessFileName,FileCreationTimestamp, FileCreationTimeName, DriverLoadTimestamp, DriverLoadFileName, ReportId
| extend Timestamp=FileCreationTimestamp