Account created or deleted by non-approved user

// Add non-approved user principal names to the list below to search for their account creation/deletion activity
// ex: dynamic(["UPN1", "upn123"])
let nonapproved_users = dynamic([]);
AuditLogs
| where OperationName =~ "Add user" or OperationName =~ "Delete user"
| where Result =~ "success"
| extend InitiatingUser = tostring(InitiatedBy.user.userPrincipalName)
| where InitiatingUser has_any (nonapproved_users)
| project-reorder TimeGenerated, ResourceId, OperationName, InitiatingUser, TargetResources
| extend InitiatedUserIpAddress = tostring(InitiatedBy.user.ipAddress)
| extend Name = tostring(split(InitiatingUser,'@',0)[0]), UPNSuffix = tostring(split(InitiatingUser,'@',1)[0])

severity: Medium
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Azure Active Directory/Analytic Rules/AccountCreatedDeletedByNonApprovedUser.yaml
description: |
  'Identifies accounts that were created or deleted by a defined list of non-approved user principal names. Add to this list before running the query for accurate results.
  Ref : https://docs.microsoft.com/azure/active-directory/fundamentals/security-operations-user-accounts'  
tags:
- AADSecOpsGuide
triggerOperator: gt
queryPeriod: 1d
requiredDataConnectors:
- dataTypes:
  - AuditLogs
  connectorId: AzureActiveDirectory
queryFrequency: 1d
triggerThreshold: 0
tactics:
- InitialAccess
query: |
  // Add non-approved user principal names to the list below to search for their account creation/deletion activity
  // ex: dynamic(["UPN1", "upn123"])
  let nonapproved_users = dynamic([]);
  AuditLogs
  | where OperationName =~ "Add user" or OperationName =~ "Delete user"
  | where Result =~ "success"
  | extend InitiatingUser = tostring(InitiatedBy.user.userPrincipalName)
  | where InitiatingUser has_any (nonapproved_users)
  | project-reorder TimeGenerated, ResourceId, OperationName, InitiatingUser, TargetResources
  | extend InitiatedUserIpAddress = tostring(InitiatedBy.user.ipAddress)
  | extend Name = tostring(split(InitiatingUser,'@',0)[0]), UPNSuffix = tostring(split(InitiatingUser,'@',1)[0])  
status: Available
kind: Scheduled
relevantTechniques:
- T1078.004
version: 1.0.2
id: 6d63efa6-7c25-4bd4-a486-aa6bf50fde8a
entityMappings:
- fieldMappings:
  - columnName: Name
    identifier: Name
  - columnName: UPNSuffix
    identifier: UPNSuffix
  entityType: Account
- fieldMappings:
  - columnName: InitiatedUserIpAddress
    identifier: Address
  entityType: IP
name: Account created or deleted by non-approved user

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "workspace": {
      "type": "String"
    }
  },
  "resources": [
    {
      "id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/6d63efa6-7c25-4bd4-a486-aa6bf50fde8a')]",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/6d63efa6-7c25-4bd4-a486-aa6bf50fde8a')]",
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules",
      "kind": "Scheduled",
      "apiVersion": "2022-11-01-preview",
      "properties": {
        "displayName": "Account created or deleted by non-approved user",
        "description": "'Identifies accounts that were created or deleted by a defined list of non-approved user principal names. Add to this list before running the query for accurate results.\nRef : https://docs.microsoft.com/azure/active-directory/fundamentals/security-operations-user-accounts'\n",
        "severity": "Medium",
        "enabled": true,
        "query": "// Add non-approved user principal names to the list below to search for their account creation/deletion activity\n// ex: dynamic([\"UPN1\", \"upn123\"])\nlet nonapproved_users = dynamic([]);\nAuditLogs\n| where OperationName =~ \"Add user\" or OperationName =~ \"Delete user\"\n| where Result =~ \"success\"\n| extend InitiatingUser = tostring(InitiatedBy.user.userPrincipalName)\n| where InitiatingUser has_any (nonapproved_users)\n| project-reorder TimeGenerated, ResourceId, OperationName, InitiatingUser, TargetResources\n| extend InitiatedUserIpAddress = tostring(InitiatedBy.user.ipAddress)\n| extend Name = tostring(split(InitiatingUser,'@',0)[0]), UPNSuffix = tostring(split(InitiatingUser,'@',1)[0])\n",
        "queryFrequency": "P1D",
        "queryPeriod": "P1D",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0,
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "InitialAccess"
        ],
        "techniques": [
          "T1078.004"
        ],
        "alertRuleTemplateName": "6d63efa6-7c25-4bd4-a486-aa6bf50fde8a",
        "customDetails": null,
        "entityMappings": [
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "Name",
                "identifier": "Name"
              },
              {
                "columnName": "UPNSuffix",
                "identifier": "UPNSuffix"
              }
            ]
          },
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "InitiatedUserIpAddress",
                "identifier": "Address"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Azure Active Directory/Analytic Rules/AccountCreatedDeletedByNonApprovedUser.yaml",
        "status": "Available",
        "tags": [
          "AADSecOpsGuide"
        ],
        "templateVersion": "1.0.2"
      }
    }
  ]
}