Vectra Create Incident Based on Priority for Hosts

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Id	9b51b0fb-0419-4450-9ea0-0a48751c4902
Rulename	Vectra Create Incident Based on Priority for Hosts
Description	Create an incident when an identity is suspected to be compromised. Vectra is using AI to prioritize an entity based on multiple factors (attack rating, velocity, breadth, importance.etc.). This layer of aggregation at the entity level provides a greater signal-to-noise ratio and help analyst focus on what matters.
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/Priority_Host.yaml
Version	1.0.1
Arm template	9b51b0fb-0419-4450-9ea0-0a48751c4902.json

KQL

Entities_Data_CL
| where type_s == "host" and is_prioritized_b == true
| summarize arg_max(['last_modified_timestamp_t'], *) by ['name_s']

YAML

status: Available
triggerOperator: GreaterThan
incidentConfiguration:
  groupingConfiguration:
    matchingMethod: AllEntities
    enabled: true
    reopenClosedIncident: true
    lookbackDuration: P7D
  createIncident: true
triggerThreshold: 0
name: Vectra Create Incident Based on Priority for Hosts
suppressionEnabled: false
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Vectra XDR/Analytic Rules/Priority_Host.yaml
queryPeriod: 10m
severity: Medium
eventGroupingSettings:
  aggregationKind: AlertPerResult
kind: Scheduled
entityMappings:
- entityType: Host
  fieldMappings:
  - columnName: name_s
    identifier: HostName
queryFrequency: 10m
relevantTechniques:
- T1546
requiredDataConnectors:
- dataTypes:
  - Entities_Data_CL
  connectorId: VectraXDR
customDetails:
  ip_address: ip_s
  attack_profile: attack_profile_s
  tags: tags_s
  entity_id: id_d
  entity_importance: entity_importance_d
  entity_type: type_s
suppressionDuration: PT1H
description: Create an incident when an identity is suspected to be compromised. Vectra is using AI to prioritize an entity based on multiple factors (attack rating, velocity, breadth, importance.etc.). This layer of aggregation at the entity level provides a greater signal-to-noise ratio and help analyst focus on what matters.
tactics:
- Persistence
query: |
  Entities_Data_CL
  | where type_s == "host" and is_prioritized_b == true
  | summarize arg_max(['last_modified_timestamp_t'], *) by ['name_s']  
id: 9b51b0fb-0419-4450-9ea0-0a48751c4902
version: 1.0.1
alertDetailsOverride:
  alertDescriptionFormat: An incident has been generated for Vectra AI entity {{name_s}} that is presenting an urgency score of {{urgency_score_d}}.
  alertDynamicProperties:
  - alertProperty: AlertLink
    value: url_s
  alertDisplayNameFormat: Vectra AI Incident- {{name_s}}

ARM

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "workspace": {
      "type": "String"
    }
  },
  "resources": [
    {
      "apiVersion": "2024-01-01-preview",
      "id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/9b51b0fb-0419-4450-9ea0-0a48751c4902')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/9b51b0fb-0419-4450-9ea0-0a48751c4902')]",
      "properties": {
        "alertDetailsOverride": {
          "alertDescriptionFormat": "An incident has been generated for Vectra AI entity {{name_s}} that is presenting an urgency score of {{urgency_score_d}}.",
          "alertDisplayNameFormat": "Vectra AI Incident- {{name_s}}",
          "alertDynamicProperties": [
            {
              "alertProperty": "AlertLink",
              "value": "url_s"
            }
          ]
        },
        "alertRuleTemplateName": "9b51b0fb-0419-4450-9ea0-0a48751c4902",
        "customDetails": {
          "attack_profile": "attack_profile_s",
          "entity_id": "id_d",
          "entity_importance": "entity_importance_d",
          "entity_type": "type_s",
          "ip_address": "ip_s",
          "tags": "tags_s"
        },
        "description": "Create an incident when an identity is suspected to be compromised. Vectra is using AI to prioritize an entity based on multiple factors (attack rating, velocity, breadth, importance.etc.). This layer of aggregation at the entity level provides a greater signal-to-noise ratio and help analyst focus on what matters.",
        "displayName": "Vectra Create Incident Based on Priority for Hosts",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Host",
            "fieldMappings": [
              {
                "columnName": "name_s",
                "identifier": "HostName"
              }
            ]
          }
        ],
        "eventGroupingSettings": {
          "aggregationKind": "AlertPerResult"
        },
        "incidentConfiguration": {
          "createIncident": true,
          "groupingConfiguration": {
            "enabled": true,
            "lookbackDuration": "P7D",
            "matchingMethod": "AllEntities",
            "reopenClosedIncident": true
          }
        },
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Vectra XDR/Analytic Rules/Priority_Host.yaml",
        "query": "Entities_Data_CL\n| where type_s == \"host\" and is_prioritized_b == true\n| summarize arg_max(['last_modified_timestamp_t'], *) by ['name_s']\n",
        "queryFrequency": "PT10M",
        "queryPeriod": "PT10M",
        "severity": "Medium",
        "status": "Available",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "Persistence"
        ],
        "techniques": [
          "T1546"
        ],
        "templateVersion": "1.0.1",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}