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

suppressionEnabled: false
relevantTechniques:
- T1546
incidentConfiguration:
  groupingConfiguration:
    reopenClosedIncident: false
    matchingMethod: AllEntities
    enabled: false
    lookbackDuration: PT5H
  createIncident: false
type: Microsoft.OperationalInsights/workspaces/providers/alertRules
requiredDataConnectors:
- connectorId: MicrosoftThreatProtection
  dataTypes:
  - AlertEvidence
triggerThreshold: 0
version: 1.0.0
suppressionDuration: PT5H
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.
query: |
  AlertEvidence
  | where EntityType in ("Device", "User")  
triggerOperator: GreaterThan
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Vectra XDR/Analytic Rules/Defender_Alert_Evidence.yaml
eventGroupingSettings:
  aggregationKind: SingleAlert
id: 8138863e-e55f-4f02-ac94-72796e203d27
queryFrequency: 60m
entityMappings:
- fieldMappings:
  - columnName: AccountName
    identifier: Name
  entityType: Account
- fieldMappings:
  - columnName: LocalIP
    identifier: Address
  entityType: IP
- fieldMappings:
  - columnName: DeviceName
    identifier: HostName
  entityType: Host
severity: High
status: Available
queryPeriod: 60m
name: Defender Alert Evidence
tactics:
- Persistence
kind: Scheduled

ARM