Account Created and Deleted in Short Timeframe

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Id	bb616d82-108f-47d3-9dec-9652ea0d3bf6
Rulename	Account Created and Deleted in Short Timeframe
Description	Search for user principal name (UPN) events. Look for accounts created and then deleted in under 24 hours. Attackers may create an account for their use, and then remove the account when no longer needed. Ref : https://docs.microsoft.com/azure/active-directory/fundamentals/security-operations-user-accounts#short-lived-account
Severity	High
Tactics	InitialAccess
Techniques	T1078.004
Required data connectors	AzureActiveDirectory
Kind	Scheduled
Query frequency	1h
Query period	1d
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Microsoft Entra ID/Analytic Rules/AccountCreatedandDeletedinShortTimeframe.yaml
Version	1.1.0
Arm template	bb616d82-108f-47d3-9dec-9652ea0d3bf6.json

KQL

let queryfrequency = 1h;
let queryperiod = 1d;
AuditLogs
| where TimeGenerated > ago(queryfrequency)
| where OperationName =~ "Delete user"
| mv-apply TargetResource = TargetResources on 
  (
      where TargetResource.type == "User"
      | extend TargetUserPrincipalName = extract(@'([a-f0-9]{32})?(.*)', 2, tostring(TargetResource.userPrincipalName))
  )
| extend DeletedByApp = tostring(InitiatedBy.app.displayName),
DeletedByAppServicePrincipalId = tostring(InitiatedBy.app.servicePrincipalId),
DeletedByUserPrincipalName = tostring(InitiatedBy.user.userPrincipalName),
DeletedByAadUserId = tostring(InitiatedBy.user.id),
DeletedByIPAddress = tostring(InitiatedBy.user.ipAddress)
| project Deletion_TimeGenerated = TimeGenerated, TargetUserPrincipalName, DeletedByApp, DeletedByAppServicePrincipalId, DeletedByUserPrincipalName, DeletedByAadUserId, DeletedByIPAddress, 
Deletion_AdditionalDetails = AdditionalDetails, Deletion_InitiatedBy = InitiatedBy, Deletion_TargetResources = TargetResources
| join kind=inner (
    AuditLogs
    | where TimeGenerated > ago(queryperiod)
    | where OperationName =~ "Add user"      
    | mv-apply TargetResource = TargetResources on 
      (
          where TargetResource.type == "User"
          | extend TargetUserPrincipalName = trim(@'"',tostring(TargetResource.userPrincipalName))
      )
    | project-rename Creation_TimeGenerated = TimeGenerated
) on TargetUserPrincipalName
| extend TimeDelta = Deletion_TimeGenerated - Creation_TimeGenerated
| where  TimeDelta between (time(0s) .. queryperiod)
| extend CreatedByApp = tostring(InitiatedBy.app.displayName),
CreatedByAppServicePrincipalId = tostring(InitiatedBy.app.servicePrincipalId),
CreatedByUserPrincipalName = tostring(InitiatedBy.user.userPrincipalName),
CreatedByAadUserId = tostring(InitiatedBy.user.id),
CreatedByIPAddress = tostring(InitiatedBy.user.ipAddress)
| project Creation_TimeGenerated, Deletion_TimeGenerated, TimeDelta, TargetUserPrincipalName, DeletedByApp, DeletedByAppServicePrincipalId, DeletedByUserPrincipalName, DeletedByAadUserId, DeletedByIPAddress, 
CreatedByApp, CreatedByAppServicePrincipalId, CreatedByUserPrincipalName, CreatedByAadUserId, CreatedByIPAddress, Creation_AdditionalDetails = AdditionalDetails, Creation_InitiatedBy = InitiatedBy, Creation_TargetResources = TargetResources, Deletion_AdditionalDetails, Deletion_InitiatedBy, Deletion_TargetResources
| extend TargetName = tostring(split(TargetUserPrincipalName,'@',0)[0]), TargetUPNSuffix = tostring(split(TargetUserPrincipalName,'@',1)[0])
| extend CreatedByName = tostring(split(CreatedByUserPrincipalName,'@',0)[0]), CreatedByUPNSuffix = tostring(split(CreatedByUserPrincipalName,'@',1)[0])
| extend DeletedByName = tostring(split(DeletedByUserPrincipalName,'@',0)[0]), DeletedByUPNSuffix = tostring(split(DeletedByUserPrincipalName,'@',1)[0])

YAML

query: |
  let queryfrequency = 1h;
  let queryperiod = 1d;
  AuditLogs
  | where TimeGenerated > ago(queryfrequency)
  | where OperationName =~ "Delete user"
  | mv-apply TargetResource = TargetResources on 
    (
        where TargetResource.type == "User"
        | extend TargetUserPrincipalName = extract(@'([a-f0-9]{32})?(.*)', 2, tostring(TargetResource.userPrincipalName))
    )
  | extend DeletedByApp = tostring(InitiatedBy.app.displayName),
  DeletedByAppServicePrincipalId = tostring(InitiatedBy.app.servicePrincipalId),
  DeletedByUserPrincipalName = tostring(InitiatedBy.user.userPrincipalName),
  DeletedByAadUserId = tostring(InitiatedBy.user.id),
  DeletedByIPAddress = tostring(InitiatedBy.user.ipAddress)
  | project Deletion_TimeGenerated = TimeGenerated, TargetUserPrincipalName, DeletedByApp, DeletedByAppServicePrincipalId, DeletedByUserPrincipalName, DeletedByAadUserId, DeletedByIPAddress, 
  Deletion_AdditionalDetails = AdditionalDetails, Deletion_InitiatedBy = InitiatedBy, Deletion_TargetResources = TargetResources
  | join kind=inner (
      AuditLogs
      | where TimeGenerated > ago(queryperiod)
      | where OperationName =~ "Add user"      
      | mv-apply TargetResource = TargetResources on 
        (
            where TargetResource.type == "User"
            | extend TargetUserPrincipalName = trim(@'"',tostring(TargetResource.userPrincipalName))
        )
      | project-rename Creation_TimeGenerated = TimeGenerated
  ) on TargetUserPrincipalName
  | extend TimeDelta = Deletion_TimeGenerated - Creation_TimeGenerated
  | where  TimeDelta between (time(0s) .. queryperiod)
  | extend CreatedByApp = tostring(InitiatedBy.app.displayName),
  CreatedByAppServicePrincipalId = tostring(InitiatedBy.app.servicePrincipalId),
  CreatedByUserPrincipalName = tostring(InitiatedBy.user.userPrincipalName),
  CreatedByAadUserId = tostring(InitiatedBy.user.id),
  CreatedByIPAddress = tostring(InitiatedBy.user.ipAddress)
  | project Creation_TimeGenerated, Deletion_TimeGenerated, TimeDelta, TargetUserPrincipalName, DeletedByApp, DeletedByAppServicePrincipalId, DeletedByUserPrincipalName, DeletedByAadUserId, DeletedByIPAddress, 
  CreatedByApp, CreatedByAppServicePrincipalId, CreatedByUserPrincipalName, CreatedByAadUserId, CreatedByIPAddress, Creation_AdditionalDetails = AdditionalDetails, Creation_InitiatedBy = InitiatedBy, Creation_TargetResources = TargetResources, Deletion_AdditionalDetails, Deletion_InitiatedBy, Deletion_TargetResources
  | extend TargetName = tostring(split(TargetUserPrincipalName,'@',0)[0]), TargetUPNSuffix = tostring(split(TargetUserPrincipalName,'@',1)[0])
  | extend CreatedByName = tostring(split(CreatedByUserPrincipalName,'@',0)[0]), CreatedByUPNSuffix = tostring(split(CreatedByUserPrincipalName,'@',1)[0])
  | extend DeletedByName = tostring(split(DeletedByUserPrincipalName,'@',0)[0]), DeletedByUPNSuffix = tostring(split(DeletedByUserPrincipalName,'@',1)[0])  
queryPeriod: 1d
version: 1.1.0
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Microsoft Entra ID/Analytic Rules/AccountCreatedandDeletedinShortTimeframe.yaml
severity: High
kind: Scheduled
triggerThreshold: 0
id: bb616d82-108f-47d3-9dec-9652ea0d3bf6
status: Available
requiredDataConnectors:
- dataTypes:
  - SigninLogs
  connectorId: AzureActiveDirectory
tags:
- AADSecOpsGuide
name: Account Created and Deleted in Short Timeframe
description: |
  'Search for user principal name (UPN) events. Look for accounts created and then deleted in under 24 hours. Attackers may create an account for their use, and then remove the account when no longer needed.
  Ref : https://docs.microsoft.com/azure/active-directory/fundamentals/security-operations-user-accounts#short-lived-account'  
triggerOperator: gt
tactics:
- InitialAccess
queryFrequency: 1h
relevantTechniques:
- T1078.004
entityMappings:
- fieldMappings:
  - identifier: FullName
    columnName: TargetUserPrincipalName
  - identifier: Name
    columnName: TargetName
  - identifier: UPNSuffix
    columnName: TargetUPNSuffix
  entityType: Account
- fieldMappings:
  - identifier: FullName
    columnName: CreatedByUserPrincipalName
  - identifier: Name
    columnName: CreatedByName
  - identifier: UPNSuffix
    columnName: CreatedByUPNSuffix
  entityType: Account
- fieldMappings:
  - identifier: AadUserId
    columnName: CreatedByAadUserId
  entityType: Account
- fieldMappings:
  - identifier: FullName
    columnName: DeletedByUserPrincipalName
  - identifier: Name
    columnName: DeletedByName
  - identifier: UPNSuffix
    columnName: DeletedByUPNSuffix
  entityType: Account
- fieldMappings:
  - identifier: AadUserId
    columnName: DeletedByAadUserId
  entityType: Account
- fieldMappings:
  - identifier: Address
    columnName: CreatedByIPAddress
  entityType: IP
- fieldMappings:
  - identifier: Address
    columnName: DeletedByIPAddress
  entityType: IP

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/bb616d82-108f-47d3-9dec-9652ea0d3bf6')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/bb616d82-108f-47d3-9dec-9652ea0d3bf6')]",
      "properties": {
        "alertRuleTemplateName": "bb616d82-108f-47d3-9dec-9652ea0d3bf6",
        "customDetails": null,
        "description": "'Search for user principal name (UPN) events. Look for accounts created and then deleted in under 24 hours. Attackers may create an account for their use, and then remove the account when no longer needed.\nRef : https://docs.microsoft.com/azure/active-directory/fundamentals/security-operations-user-accounts#short-lived-account'\n",
        "displayName": "Account Created and Deleted in Short Timeframe",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "TargetUserPrincipalName",
                "identifier": "FullName"
              },
              {
                "columnName": "TargetName",
                "identifier": "Name"
              },
              {
                "columnName": "TargetUPNSuffix",
                "identifier": "UPNSuffix"
              }
            ]
          },
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "CreatedByUserPrincipalName",
                "identifier": "FullName"
              },
              {
                "columnName": "CreatedByName",
                "identifier": "Name"
              },
              {
                "columnName": "CreatedByUPNSuffix",
                "identifier": "UPNSuffix"
              }
            ]
          },
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "CreatedByAadUserId",
                "identifier": "AadUserId"
              }
            ]
          },
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "DeletedByUserPrincipalName",
                "identifier": "FullName"
              },
              {
                "columnName": "DeletedByName",
                "identifier": "Name"
              },
              {
                "columnName": "DeletedByUPNSuffix",
                "identifier": "UPNSuffix"
              }
            ]
          },
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "DeletedByAadUserId",
                "identifier": "AadUserId"
              }
            ]
          },
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "CreatedByIPAddress",
                "identifier": "Address"
              }
            ]
          },
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "DeletedByIPAddress",
                "identifier": "Address"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Microsoft Entra ID/Analytic Rules/AccountCreatedandDeletedinShortTimeframe.yaml",
        "query": "let queryfrequency = 1h;\nlet queryperiod = 1d;\nAuditLogs\n| where TimeGenerated > ago(queryfrequency)\n| where OperationName =~ \"Delete user\"\n| mv-apply TargetResource = TargetResources on \n  (\n      where TargetResource.type == \"User\"\n      | extend TargetUserPrincipalName = extract(@'([a-f0-9]{32})?(.*)', 2, tostring(TargetResource.userPrincipalName))\n  )\n| extend DeletedByApp = tostring(InitiatedBy.app.displayName),\nDeletedByAppServicePrincipalId = tostring(InitiatedBy.app.servicePrincipalId),\nDeletedByUserPrincipalName = tostring(InitiatedBy.user.userPrincipalName),\nDeletedByAadUserId = tostring(InitiatedBy.user.id),\nDeletedByIPAddress = tostring(InitiatedBy.user.ipAddress)\n| project Deletion_TimeGenerated = TimeGenerated, TargetUserPrincipalName, DeletedByApp, DeletedByAppServicePrincipalId, DeletedByUserPrincipalName, DeletedByAadUserId, DeletedByIPAddress, \nDeletion_AdditionalDetails = AdditionalDetails, Deletion_InitiatedBy = InitiatedBy, Deletion_TargetResources = TargetResources\n| join kind=inner (\n    AuditLogs\n    | where TimeGenerated > ago(queryperiod)\n    | where OperationName =~ \"Add user\"      \n    | mv-apply TargetResource = TargetResources on \n      (\n          where TargetResource.type == \"User\"\n          | extend TargetUserPrincipalName = trim(@'\"',tostring(TargetResource.userPrincipalName))\n      )\n    | project-rename Creation_TimeGenerated = TimeGenerated\n) on TargetUserPrincipalName\n| extend TimeDelta = Deletion_TimeGenerated - Creation_TimeGenerated\n| where  TimeDelta between (time(0s) .. queryperiod)\n| extend CreatedByApp = tostring(InitiatedBy.app.displayName),\nCreatedByAppServicePrincipalId = tostring(InitiatedBy.app.servicePrincipalId),\nCreatedByUserPrincipalName = tostring(InitiatedBy.user.userPrincipalName),\nCreatedByAadUserId = tostring(InitiatedBy.user.id),\nCreatedByIPAddress = tostring(InitiatedBy.user.ipAddress)\n| project Creation_TimeGenerated, Deletion_TimeGenerated, TimeDelta, TargetUserPrincipalName, DeletedByApp, DeletedByAppServicePrincipalId, DeletedByUserPrincipalName, DeletedByAadUserId, DeletedByIPAddress, \nCreatedByApp, CreatedByAppServicePrincipalId, CreatedByUserPrincipalName, CreatedByAadUserId, CreatedByIPAddress, Creation_AdditionalDetails = AdditionalDetails, Creation_InitiatedBy = InitiatedBy, Creation_TargetResources = TargetResources, Deletion_AdditionalDetails, Deletion_InitiatedBy, Deletion_TargetResources\n| extend TargetName = tostring(split(TargetUserPrincipalName,'@',0)[0]), TargetUPNSuffix = tostring(split(TargetUserPrincipalName,'@',1)[0])\n| extend CreatedByName = tostring(split(CreatedByUserPrincipalName,'@',0)[0]), CreatedByUPNSuffix = tostring(split(CreatedByUserPrincipalName,'@',1)[0])\n| extend DeletedByName = tostring(split(DeletedByUserPrincipalName,'@',0)[0]), DeletedByUPNSuffix = tostring(split(DeletedByUserPrincipalName,'@',1)[0])\n",
        "queryFrequency": "PT1H",
        "queryPeriod": "P1D",
        "severity": "High",
        "status": "Available",
        "subTechniques": [
          "T1078.004"
        ],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "InitialAccess"
        ],
        "tags": [
          "AADSecOpsGuide"
        ],
        "techniques": [
          "T1078"
        ],
        "templateVersion": "1.1.0",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}