Account Created and Deleted in Short Timeframe

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])

name: Account Created and Deleted in Short Timeframe
id: bb616d82-108f-47d3-9dec-9652ea0d3bf6
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'  
triggerThreshold: 0
entityMappings:
- 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: Account
- fieldMappings:
  - columnName: CreatedByIPAddress
    identifier: Address
  entityType: IP
- fieldMappings:
  - columnName: DeletedByIPAddress
    identifier: Address
  entityType: IP
version: 1.1.0
triggerOperator: gt
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])  
tactics:
- InitialAccess
kind: Scheduled
queryFrequency: 1h
tags:
- AADSecOpsGuide
severity: High
queryPeriod: 1d
requiredDataConnectors:
- dataTypes:
  - SigninLogs
  connectorId: AzureActiveDirectory
status: Available
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Microsoft Entra ID/Analytic Rules/AccountCreatedandDeletedinShortTimeframe.yaml
relevantTechniques:
- T1078.004