Account created or deleted by non-approved user

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Id	6d63efa6-7c25-4bd4-a486-aa6bf50fde8a
Rulename	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. Ref : https://docs.microsoft.com/azure/active-directory/fundamentals/security-operations-user-accounts
Severity	Medium
Tactics	InitialAccess
Techniques	T1078.004
Required data connectors	AzureActiveDirectory
Kind	Scheduled
Query frequency	1d
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/AccountCreatedDeletedByNonApprovedUser.yaml
Version	1.1.1
Arm template	6d63efa6-7c25-4bd4-a486-aa6bf50fde8a.json

KQL

// Add non-approved user principal names or apps to the list below to search for their account creation/deletion activity
// ex: dynamic(["UPN1", "upn123"])
let nonapproved_users = dynamic([]);
let nonapproved_apps = dynamic([]);
AuditLogs
| where OperationName =~ "Add user" or OperationName =~ "Delete user"
| where Result =~ "success"
| extend InitiatingAppName = tostring(InitiatedBy.app.displayName)
| extend InitiatingAppServicePrincipalId = tostring(InitiatedBy.app.servicePrincipalId)
| extend InitiatingUserPrincipalName = tostring(InitiatedBy.user.userPrincipalName)
| extend InitiatingAadUserId = tostring(InitiatedBy.user.id)
| extend InitiatingIpAddress = tostring(iff(isnotempty(InitiatedBy.user.ipAddress), InitiatedBy.user.ipAddress, InitiatedBy.app.ipAddress))
| where InitiatingUserPrincipalName has_any (nonapproved_users) or InitiatingAppName has_any (nonapproved_apps)
| extend InitiatingAccountName = tostring(split(InitiatingUserPrincipalName, "@")[0]), InitiatingAccountUPNSuffix = tostring(split(InitiatingUserPrincipalName, "@")[1])

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'  
version: 1.1.1
triggerThreshold: 0
tactics:
- InitialAccess
queryPeriod: 1d
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Microsoft Entra ID/Analytic Rules/AccountCreatedDeletedByNonApprovedUser.yaml
triggerOperator: gt
status: Available
id: 6d63efa6-7c25-4bd4-a486-aa6bf50fde8a
name: Account created or deleted by non-approved user
queryFrequency: 1d
severity: Medium
kind: Scheduled
entityMappings:
- fieldMappings:
  - columnName: InitiatingAppName
    identifier: Name
  - columnName: InitiatingAppServicePrincipalId
    identifier: AadUserId
  entityType: Account
- fieldMappings:
  - columnName: InitiatingUserPrincipalName
    identifier: FullName
  - columnName: InitiatingAccountName
    identifier: Name
  - columnName: InitiatingAccountUPNSuffix
    identifier: UPNSuffix
  entityType: Account
- fieldMappings:
  - columnName: InitiatingAadUserId
    identifier: AadUserId
  entityType: Account
- fieldMappings:
  - columnName: InitiatingIpAddress
    identifier: Address
  entityType: IP
relevantTechniques:
- T1078.004
query: |
  // Add non-approved user principal names or apps to the list below to search for their account creation/deletion activity
  // ex: dynamic(["UPN1", "upn123"])
  let nonapproved_users = dynamic([]);
  let nonapproved_apps = dynamic([]);
  AuditLogs
  | where OperationName =~ "Add user" or OperationName =~ "Delete user"
  | where Result =~ "success"
  | extend InitiatingAppName = tostring(InitiatedBy.app.displayName)
  | extend InitiatingAppServicePrincipalId = tostring(InitiatedBy.app.servicePrincipalId)
  | extend InitiatingUserPrincipalName = tostring(InitiatedBy.user.userPrincipalName)
  | extend InitiatingAadUserId = tostring(InitiatedBy.user.id)
  | extend InitiatingIpAddress = tostring(iff(isnotempty(InitiatedBy.user.ipAddress), InitiatedBy.user.ipAddress, InitiatedBy.app.ipAddress))
  | where InitiatingUserPrincipalName has_any (nonapproved_users) or InitiatingAppName has_any (nonapproved_apps)
  | extend InitiatingAccountName = tostring(split(InitiatingUserPrincipalName, "@")[0]), InitiatingAccountUPNSuffix = tostring(split(InitiatingUserPrincipalName, "@")[1])  
tags:
- AADSecOpsGuide
requiredDataConnectors:
- dataTypes:
  - AuditLogs
  connectorId: AzureActiveDirectory

ARM