Vectra Create Detection Alert for Hosts

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Id	fb861539-da19-4266-831f-99459b8e7605
Rulename	Vectra Create Detection Alert for Hosts
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_Host.yaml
Version	1.0.1
Arm template	fb861539-da19-4266-831f-99459b8e7605.json

KQL

VectraDetections
| where Type == "host"
| 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

entityMappings:
- entityType: Host
  fieldMappings:
  - identifier: HostName
    columnName: entity_uid
tactics:
- Persistence
suppressionEnabled: false
suppressionDuration: PT1H
requiredDataConnectors:
- dataTypes:
  - Detections_Data_CL
  connectorId: VectraXDR
alertDetailsOverride:
  alertDisplayNameFormat: Vectra AI Detection- {{detection}}
  alertDescriptionFormat: Vectra AI has detected {{category}} - {{detection}} on entity {{entity_uid}}.
  alertDynamicProperties:
  - value: detection_url
    alertProperty: AlertLink
incidentConfiguration:
  groupingConfiguration:
    enabled: false
    lookbackDuration: PT5H
    reopenClosedIncident: false
    matchingMethod: AllEntities
  createIncident: false
id: fb861539-da19-4266-831f-99459b8e7605
severity: Medium
eventGroupingSettings:
  aggregationKind: AlertPerResult
status: Available
customDetails:
  entity_type: entity_type
  entity_id: entity_id
  tags: tags
  mitre_techniques: mitre
  detection_id: detection_id
query: |
  VectraDetections
  | where Type == "host"
  | 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  
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Vectra XDR/Analytic Rules/Detection_Host.yaml
kind: Scheduled
queryPeriod: 10m
name: Vectra Create Detection Alert for Hosts
queryFrequency: 10m
triggerOperator: GreaterThan
relevantTechniques:
- T1546
version: 1.0.1
triggerThreshold: 0
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

ARM