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Added query as example

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Added query in the document as an example.

Problem: https://github.com/MicrosoftDocs/windows-itpro-docs/issues/4904
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ImranHabib 2019-09-28 05:43:15 +05:00 committed by GitHub
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7
windows/security/threat-protection/microsoft-defender-atp/custom-detection-rules.md
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@ -36,6 +36,13 @@ In Microsoft Defender Security Center, go to **Advanced hunting** and select an
>[!NOTE]
>To use a query for a custom detection rule, the query must return the `EventTime`, `MachineId`, and `ReportId` columns in the results. Queries that don’t use the `project` operator to customize results usually return these common columns.
>[Example]
>MiscEvents
| where EventTime > ago(7d)
| where ActionType == "AntivirusDetection"
| summarize (EventTime, ReportId)=arg_max(EventTime, ReportId), count() by MachineId
This will fetch latest EventTime and ReportId of the latest event among multiple events returned by the query and adds the count by MachineId.
### 2. Create new rule and provide alert details.
With the query in the query editor, select **Create detection rule** and specify the following alert details: