Bitglass - Multiple files shared with external entity

let threshold = 5;
Bitglass
| where EventType =~ 'cloudaudit'
| where Action =~ 'Action  DLPScan'
| where EventMessage has_all ('External', 'Shared', 'DLP')
| summarize f_cnt = makeset(SrcFileName) by User, bin(TimeGenerated, 10m)
| where array_length(f_cnt) >= threshold
| extend AccountCustomEntity = User

name: Bitglass - Multiple files shared with external entity
relevantTechniques:
- T1567
requiredDataConnectors:
- dataTypes:
  - Bitglass
  connectorId: Bitglass
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Bitglass/Analytic Rules/BitglassFilesSharedWithExternal.yaml
query: |
  let threshold = 5;
  Bitglass
  | where EventType =~ 'cloudaudit'
  | where Action =~ 'Action  DLPScan'
  | where EventMessage has_all ('External', 'Shared', 'DLP')
  | summarize f_cnt = makeset(SrcFileName) by User, bin(TimeGenerated, 10m)
  | where array_length(f_cnt) >= threshold
  | extend AccountCustomEntity = User  
tactics:
- Exfiltration
description: |
    'Detects when multiple files shared with external entity.'
entityMappings:
- fieldMappings:
  - columnName: AccountCustomEntity
    identifier: Name
  entityType: Account
queryFrequency: 1h
triggerOperator: gt
version: 1.0.0
queryPeriod: 1h
status: Available
kind: Scheduled
severity: Medium
triggerThreshold: 0
id: 09690f9b-33d1-4372-a6aa-eb7d3b3cdebc

{
  "$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/09690f9b-33d1-4372-a6aa-eb7d3b3cdebc')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/09690f9b-33d1-4372-a6aa-eb7d3b3cdebc')]",
      "properties": {
        "alertRuleTemplateName": "09690f9b-33d1-4372-a6aa-eb7d3b3cdebc",
        "customDetails": null,
        "description": "'Detects when multiple files shared with external entity.'\n",
        "displayName": "Bitglass - Multiple files shared with external entity",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "AccountCustomEntity",
                "identifier": "Name"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Bitglass/Analytic Rules/BitglassFilesSharedWithExternal.yaml",
        "query": "let threshold = 5;\nBitglass\n| where EventType =~ 'cloudaudit'\n| where Action =~ 'Action  DLPScan'\n| where EventMessage has_all ('External', 'Shared', 'DLP')\n| summarize f_cnt = makeset(SrcFileName) by User, bin(TimeGenerated, 10m)\n| where array_length(f_cnt) >= threshold\n| extend AccountCustomEntity = User\n",
        "queryFrequency": "PT1H",
        "queryPeriod": "PT1H",
        "severity": "Medium",
        "status": "Available",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "Exfiltration"
        ],
        "techniques": [
          "T1567"
        ],
        "templateVersion": "1.0.0",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}