Bitglass - User Agent string has changed for user

Bitglass
| where EventType =~ 'access'
| where EventMessage =~ 'Login'
| summarize ua = makeset(HttpUserAgent) by User
| join (Bitglass
        | where EventType =~ 'access'
        | where EventMessage =~ 'Login') on User
| where ua !contains HttpUserAgent
| extend AccountCustomEntity = User

query: |
  Bitglass
  | where EventType =~ 'access'
  | where EventMessage =~ 'Login'
  | summarize ua = makeset(HttpUserAgent) by User
  | join (Bitglass
          | where EventType =~ 'access'
          | where EventMessage =~ 'Login') on User
  | where ua !contains HttpUserAgent
  | extend AccountCustomEntity = User  
relevantTechniques:
- T1078
name: Bitglass - User Agent string has changed for user
severity: Medium
triggerThreshold: 0
description: |
    'Detects when User Agent string has changed for user.'
status: Available
triggerOperator: gt
tactics:
- InitialAccess
entityMappings:
- fieldMappings:
  - columnName: AccountCustomEntity
    identifier: Name
  entityType: Account
requiredDataConnectors:
- connectorId: Bitglass
  dataTypes:
  - Bitglass
id: 4dd61530-859f-49e7-bd27-a173cb1a4589
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Bitglass/Analytic Rules/BitglassUserUAChanged.yaml
queryPeriod: 14d
queryFrequency: 1h
version: 1.0.0
kind: Scheduled

{
  "$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/4dd61530-859f-49e7-bd27-a173cb1a4589')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/4dd61530-859f-49e7-bd27-a173cb1a4589')]",
      "properties": {
        "alertRuleTemplateName": "4dd61530-859f-49e7-bd27-a173cb1a4589",
        "customDetails": null,
        "description": "'Detects when User Agent string has changed for user.'\n",
        "displayName": "Bitglass - User Agent string has changed for user",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "AccountCustomEntity",
                "identifier": "Name"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Bitglass/Analytic Rules/BitglassUserUAChanged.yaml",
        "query": "Bitglass\n| where EventType =~ 'access'\n| where EventMessage =~ 'Login'\n| summarize ua = makeset(HttpUserAgent) by User\n| join (Bitglass\n        | where EventType =~ 'access'\n        | where EventMessage =~ 'Login') on User\n| where ua !contains HttpUserAgent\n| extend AccountCustomEntity = User\n",
        "queryFrequency": "PT1H",
        "queryPeriod": "P14D",
        "severity": "Medium",
        "status": "Available",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "InitialAccess"
        ],
        "techniques": [
          "T1078"
        ],
        "templateVersion": "1.0.0",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}