Vectra Create Detection Alert for Accounts

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Id	e796701f-6b39-4c54-bf8a-1d543a990784
Rulename	Vectra Create Detection Alert for Accounts
Description	This analytic rule is looking for new attacker behaviors observed by the Vectra Platform. The intent is to create entries in the SecurityAlert table for every new detection attached to an entity monitored by the Vectra Platform
Severity	Medium
Tactics	Persistence
Techniques	T1546
Required data connectors	VectraXDR
Kind	Scheduled
Query frequency	10m
Query period	10m
Trigger threshold	0
Trigger operator	GreaterThan
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Vectra XDR/Analytic Rules/Detection_Account.yaml
Version	1.0.1
Arm template	e796701f-6b39-4c54-bf8a-1d543a990784.json

KQL

VectraDetections
| where Type == "account"
| extend
    entity_uid = ['Entity UID'],
    entity_id = ['Entity ID'],
    entity_type = ['Entity Type'],
    detection_id = ['Detection ID'],
    detection = ['Detection Name'],
    category = ['Detection Category'],
    detection_url = ['Vectra Pivot'],
    mitre = Mitre,
    tags = Tags
| summarize arg_max(TimeGenerated, *) by ['Detection ID'], entity_uid

YAML

suppressionEnabled: false
relevantTechniques:
- T1546
suppressionDuration: PT1H
eventGroupingSettings:
  aggregationKind: AlertPerResult
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Vectra XDR/Analytic Rules/Detection_Account.yaml
entityMappings:
- fieldMappings:
  - identifier: Name
    columnName: entity_uid
  entityType: Account
requiredDataConnectors:
- dataTypes:
  - Detections_Data_CL
  connectorId: VectraXDR
triggerOperator: GreaterThan
queryFrequency: 10m
alertDetailsOverride:
  alertDynamicProperties:
  - alertProperty: AlertLink
    value: detection_url
  alertDisplayNameFormat: Vectra AI Detection-  {{detection}}
  alertDescriptionFormat: Vectra AI has detected {{category}} - {{detection} on entity {{entity_uid}}.
queryPeriod: 10m
status: Available
incidentConfiguration:
  groupingConfiguration:
    enabled: false
    reopenClosedIncident: false
    matchingMethod: AllEntities
    lookbackDuration: PT5H
  createIncident: false
query: |
  VectraDetections
  | where Type == "account"
  | extend
      entity_uid = ['Entity UID'],
      entity_id = ['Entity ID'],
      entity_type = ['Entity Type'],
      detection_id = ['Detection ID'],
      detection = ['Detection Name'],
      category = ['Detection Category'],
      detection_url = ['Vectra Pivot'],
      mitre = Mitre,
      tags = Tags
  | summarize arg_max(TimeGenerated, *) by ['Detection ID'], entity_uid  
name: Vectra Create Detection Alert for Accounts
kind: Scheduled
description: This analytic rule is looking for new attacker behaviors observed by the Vectra Platform. The intent is to create entries in the SecurityAlert table for every new detection attached to an entity monitored by the Vectra Platform
severity: Medium
tactics:
- Persistence
triggerThreshold: 0
version: 1.0.1
id: e796701f-6b39-4c54-bf8a-1d543a990784
customDetails:
  tags: tags
  mitre_techniques: mitre
  entity_id: entity_id
  detection_id: detection_id
  entity_type: entity_type

ARM