Power Apps - Multiple apps deleted

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Id	ed88638d-8627-4c20-ba08-67c13807a9b1
Rulename	Power Apps - Multiple apps deleted
Description	Identifies mass delete activity where multiple Power Apps are deleted, matching a predefined threshold of total apps deleted or app delete events across multiple Power Platform environments.
Severity	Medium
Tactics	Impact
Techniques	T1485 T0826
Required data connectors	PowerPlatformAdmin
Kind	Scheduled
Query frequency	1h
Query period	7d
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Microsoft Business Applications/Analytic Rules/Power Apps - Multiple apps deleted.yaml
Version	3.2.0
Arm template	ed88638d-8627-4c20-ba08-67c13807a9b1.json

KQL

let total_app_mass_delete_threshold = 25;
let cross_environment_delete_threshold = 10;
let query_frequency = 1h;
let app_delete_events = materialize(
    PowerPlatformAdminActivity
    | where TimeGenerated >= ago (query_frequency)
    | where EventOriginalType == "DeletePowerApp"
    | extend Properties = tostring(PropertyCollection)
    | extend AppId = extract(@'"powerplatform.analytics.resource.power_app.id","Value":"([^"]+)"', 1, Properties)
    | extend AppId = tolower(replace_string(AppId, '/providers/Microsoft.PowerApps/apps/', ''))
    | extend EnvironmentId = extract(@'"powerplatform.analytics.resource.environment.id","Value":"([^"]+)"', 1, Properties)
    );
app_delete_events
| summarize AppCount = count(), EnvCount = dcount(EnvironmentId) by ActorName
| where AppCount >= total_app_mass_delete_threshold or EnvCount >= cross_environment_delete_threshold
| join kind=inner app_delete_events on ActorName
| summarize
    Apps = make_set(AppId, 1000),
    Environments = make_set(EnvironmentId, 1000),
    StartTime = min(TimeGenerated)
    by AppCount, EnvCount, ActorName
| extend
    PowerAppsEntityId = 27593,
    DataverseId = 32780,
    AccountName = tostring(split(ActorName, '@')[0]),
    UPNSuffix = tostring(split(ActorName, '@')[1])
| project
    StartTime,
    ActorName,
    AppCount,
    Apps,
    EnvCount,
    Environments,
    PowerAppsEntityId,
    DataverseId,
    AccountName,
    UPNSuffix

YAML

tactics:
- Impact
relevantTechniques:
- T1485
- T0826
id: ed88638d-8627-4c20-ba08-67c13807a9b1
severity: Medium
status: Available
name: Power Apps - Multiple apps deleted
eventGroupingSettings:
  aggregationKind: SingleAlert
requiredDataConnectors:
- connectorId: PowerPlatformAdmin
  dataTypes:
  - PowerPlatformAdminActivity
query: |
  let total_app_mass_delete_threshold = 25;
  let cross_environment_delete_threshold = 10;
  let query_frequency = 1h;
  let app_delete_events = materialize(
      PowerPlatformAdminActivity
      | where TimeGenerated >= ago (query_frequency)
      | where EventOriginalType == "DeletePowerApp"
      | extend Properties = tostring(PropertyCollection)
      | extend AppId = extract(@'"powerplatform.analytics.resource.power_app.id","Value":"([^"]+)"', 1, Properties)
      | extend AppId = tolower(replace_string(AppId, '/providers/Microsoft.PowerApps/apps/', ''))
      | extend EnvironmentId = extract(@'"powerplatform.analytics.resource.environment.id","Value":"([^"]+)"', 1, Properties)
      );
  app_delete_events
  | summarize AppCount = count(), EnvCount = dcount(EnvironmentId) by ActorName
  | where AppCount >= total_app_mass_delete_threshold or EnvCount >= cross_environment_delete_threshold
  | join kind=inner app_delete_events on ActorName
  | summarize
      Apps = make_set(AppId, 1000),
      Environments = make_set(EnvironmentId, 1000),
      StartTime = min(TimeGenerated)
      by AppCount, EnvCount, ActorName
  | extend
      PowerAppsEntityId = 27593,
      DataverseId = 32780,
      AccountName = tostring(split(ActorName, '@')[0]),
      UPNSuffix = tostring(split(ActorName, '@')[1])
  | project
      StartTime,
      ActorName,
      AppCount,
      Apps,
      EnvCount,
      Environments,
      PowerAppsEntityId,
      DataverseId,
      AccountName,
      UPNSuffix  
alertDetailsOverride:
  alertDisplayNameFormat: Power Apps - mass deletion of apps
  alertDescriptionFormat: '{{AppCount}} apps were deleted in {{EnvCount}} environments by {{ActorName}} , exceeding the mass delete threshold.'
queryPeriod: 7d
entityMappings:
- entityType: CloudApplication
  fieldMappings:
  - identifier: AppId
    columnName: PowerAppsEntityId
- entityType: Account
  fieldMappings:
  - identifier: Name
    columnName: AccountName
  - identifier: UPNSuffix
    columnName: UPNSuffix
triggerOperator: gt
triggerThreshold: 0
description: Identifies mass delete activity where multiple Power Apps are deleted, matching a predefined threshold of total apps deleted or app delete events across multiple Power Platform environments.
version: 3.2.0
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Microsoft Business Applications/Analytic Rules/Power Apps - Multiple apps deleted.yaml
queryFrequency: 1h
kind: Scheduled
customDetails:
  AppDeleteCount: AppCount
  EnvironmentsCount: EnvCount
  EnvironmentsImpacted: Environments
  AppsDeleted: Apps

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/ed88638d-8627-4c20-ba08-67c13807a9b1')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/ed88638d-8627-4c20-ba08-67c13807a9b1')]",
      "properties": {
        "alertDetailsOverride": {
          "alertDescriptionFormat": "{{AppCount}} apps were deleted in {{EnvCount}} environments by {{ActorName}} , exceeding the mass delete threshold.",
          "alertDisplayNameFormat": "Power Apps - mass deletion of apps"
        },
        "alertRuleTemplateName": "ed88638d-8627-4c20-ba08-67c13807a9b1",
        "customDetails": {
          "AppDeleteCount": "AppCount",
          "AppsDeleted": "Apps",
          "EnvironmentsCount": "EnvCount",
          "EnvironmentsImpacted": "Environments"
        },
        "description": "Identifies mass delete activity where multiple Power Apps are deleted, matching a predefined threshold of total apps deleted or app delete events across multiple Power Platform environments.",
        "displayName": "Power Apps - Multiple apps deleted",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "CloudApplication",
            "fieldMappings": [
              {
                "columnName": "PowerAppsEntityId",
                "identifier": "AppId"
              }
            ]
          },
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "AccountName",
                "identifier": "Name"
              },
              {
                "columnName": "UPNSuffix",
                "identifier": "UPNSuffix"
              }
            ]
          }
        ],
        "eventGroupingSettings": {
          "aggregationKind": "SingleAlert"
        },
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Microsoft Business Applications/Analytic Rules/Power Apps - Multiple apps deleted.yaml",
        "query": "let total_app_mass_delete_threshold = 25;\nlet cross_environment_delete_threshold = 10;\nlet query_frequency = 1h;\nlet app_delete_events = materialize(\n    PowerPlatformAdminActivity\n    | where TimeGenerated >= ago (query_frequency)\n    | where EventOriginalType == \"DeletePowerApp\"\n    | extend Properties = tostring(PropertyCollection)\n    | extend AppId = extract(@'\"powerplatform.analytics.resource.power_app.id\",\"Value\":\"([^\"]+)\"', 1, Properties)\n    | extend AppId = tolower(replace_string(AppId, '/providers/Microsoft.PowerApps/apps/', ''))\n    | extend EnvironmentId = extract(@'\"powerplatform.analytics.resource.environment.id\",\"Value\":\"([^\"]+)\"', 1, Properties)\n    );\napp_delete_events\n| summarize AppCount = count(), EnvCount = dcount(EnvironmentId) by ActorName\n| where AppCount >= total_app_mass_delete_threshold or EnvCount >= cross_environment_delete_threshold\n| join kind=inner app_delete_events on ActorName\n| summarize\n    Apps = make_set(AppId, 1000),\n    Environments = make_set(EnvironmentId, 1000),\n    StartTime = min(TimeGenerated)\n    by AppCount, EnvCount, ActorName\n| extend\n    PowerAppsEntityId = 27593,\n    DataverseId = 32780,\n    AccountName = tostring(split(ActorName, '@')[0]),\n    UPNSuffix = tostring(split(ActorName, '@')[1])\n| project\n    StartTime,\n    ActorName,\n    AppCount,\n    Apps,\n    EnvCount,\n    Environments,\n    PowerAppsEntityId,\n    DataverseId,\n    AccountName,\n    UPNSuffix\n",
        "queryFrequency": "PT1H",
        "queryPeriod": "P7D",
        "severity": "Medium",
        "status": "Available",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "Impact"
        ],
        "techniques": [
          "T1485"
        ],
        "templateVersion": "3.2.0",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}