Vectra Create Detection Alert for Hosts

Back


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

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

ARM