Microsoft Sentinel Analytic Rules
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Bitglass - User Agent string has changed for user

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Id4dd61530-859f-49e7-bd27-a173cb1a4589
RulenameBitglass - User Agent string has changed for user
DescriptionDetects when User Agent string has changed for user.
SeverityMedium
TacticsInitialAccess
TechniquesT1078
Required data connectorsBitglass
KindScheduled
Query frequency1h
Query period14d
Trigger threshold0
Trigger operatorgt
Source Urihttps://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Bitglass/Analytic Rules/BitglassUserUAChanged.yaml
Version1.0.0
Arm template4dd61530-859f-49e7-bd27-a173cb1a4589.json
Deploy To Azure
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
name: Bitglass - User Agent string has changed for user
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Bitglass/Analytic Rules/BitglassUserUAChanged.yaml
queryPeriod: 14d
version: 1.0.0
severity: Medium
id: 4dd61530-859f-49e7-bd27-a173cb1a4589
triggerOperator: gt
triggerThreshold: 0
kind: Scheduled
requiredDataConnectors:
- dataTypes:
  - Bitglass
  connectorId: Bitglass
relevantTechniques:
- T1078
description: |
    'Detects when User Agent string has changed for 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  
tactics:
- InitialAccess
entityMappings:
- entityType: Account
  fieldMappings:
  - columnName: AccountCustomEntity
    identifier: Name
status: Available
queryFrequency: 1h
{
  "$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"
    }
  ]
}