Defender Alert Evidence

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Id	8138863e-e55f-4f02-ac94-72796e203d27
Rulename	Defender Alert Evidence
Description	This analytic rule is looking for new alert evidence from Microsoft Defender for Endpoint. The intent is to create entries in the SecurityAlert table for every new alert evidence attached to an entity of type Device or User monitored by Defender for Endpoint.
Severity	High
Tactics	Persistence
Techniques	T1546
Required data connectors	MicrosoftThreatProtection
Kind	Scheduled
Query frequency	60m
Query period	60m
Trigger threshold	0
Trigger operator	GreaterThan
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Vectra XDR/Analytic Rules/Defender_Alert_Evidence.yaml
Version	1.0.0
Arm template	8138863e-e55f-4f02-ac94-72796e203d27.json

KQL

AlertEvidence
| where EntityType in ("Device", "User")

YAML

id: 8138863e-e55f-4f02-ac94-72796e203d27
type: Microsoft.OperationalInsights/workspaces/providers/alertRules
triggerOperator: GreaterThan
entityMappings:
- fieldMappings:
  - identifier: Name
    columnName: AccountName
  entityType: Account
- fieldMappings:
  - identifier: Address
    columnName: LocalIP
  entityType: IP
- fieldMappings:
  - identifier: HostName
    columnName: DeviceName
  entityType: Host
eventGroupingSettings:
  aggregationKind: SingleAlert
requiredDataConnectors:
- dataTypes:
  - AlertEvidence
  connectorId: MicrosoftThreatProtection
queryFrequency: 60m
suppressionDuration: PT5H
suppressionEnabled: false
queryPeriod: 60m
status: Available
incidentConfiguration:
  groupingConfiguration:
    enabled: false
    reopenClosedIncident: false
    matchingMethod: AllEntities
    lookbackDuration: PT5H
  createIncident: false
query: |
  AlertEvidence
  | where EntityType in ("Device", "User")  
name: Defender Alert Evidence
kind: Scheduled
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Vectra XDR/Analytic Rules/Defender_Alert_Evidence.yaml
tactics:
- Persistence
severity: High
relevantTechniques:
- T1546
triggerThreshold: 0
version: 1.0.0
description: This analytic rule is looking for new alert evidence from Microsoft Defender for Endpoint. The intent is to create entries in the SecurityAlert table for every new alert evidence attached to an entity of type Device or User monitored by Defender for Endpoint.

ARM