Azure AD Global Administrator Role Assigned
Description
The following analytic identifies the assignment of the Azure AD Global Administrator role to an Azure AD user. The Global Administrator role is the most powerful administrator role in Azure AD and provides almost unlimited access to data, resources and settings. It is equivalent to the Domain Administrator group in an Active Directory environment. While Azure AD roles do not grant access to Azure services and resources, it is possible for a Global Administrator account to gain control of Azure resources. Adversaries and red teams alike may assign this role to a compromised account to establish Persistence or escalate their privileges in an Azure AD environment.
- Type: TTP
-
Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
- Last Updated: 2022-08-17
- Author: Gowthamaraj Rajendran, Mauricio Velazco, Splunk
- ID: 825fed20-309d-4fd1-8aaf-cd49c1bb093c
Annotations
Kill Chain Phase
- Installation
NIST
- DE.CM
CIS20
- CIS 10
CVE
Search
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`azuread` "body.operationName"="Add member to role" "body.properties.targetResources{}.modifiedProperties{}.newValue"="\"Global Administrator\""
| rename body.properties.* as *
| rename targetResources{}.userPrincipalName as userPrincipalName
| rename initiatedBy.user.userPrincipalName as initiatedBy
| stats values(userPrincipalName) by _time, initiatedBy, result, body.operationName
| `azure_ad_global_administrator_role_assigned_filter`
Macros
The SPL above uses the following Macros:
azure_ad_global_administrator_role_assigned_filter is a empty macro by default. It allows the user to filter out any results (false positives) without editing the SPL.
Required fields
List of fields required to use this analytic.
- _time
- body.properties.targetResources{}.userPrincipalName
- body.properties.targetResources{}.type
- body.properties.initiatedBy.user.userPrincipalName
- body.properties.result
How To Implement
You must install the latest version of Splunk Add-on for Microsoft Cloud Services from Splunkbase(https://splunkbase.splunk.com/app/3110/#/details). You must be ingesting Azure Active Directory events into your Splunk environment. Specifically, this analytic leverages the AuditLogs log category.
Known False Positives
Administrators may legitimately assign the Global Administrator role to a user. Filter as needed.
Associated Analytic Story
RBA
Risk Score | Impact | Confidence | Message |
---|---|---|---|
72.0 | 80 | 90 | Global Administrator Role assigned for User $userPrincipalName$ initiated by $initiatedBy$ |
The Risk Score is calculated by the following formula: Risk Score = (Impact * Confidence/100). Initial Confidence and Impact is set by the analytic author.
Reference
- https://o365blog.com/post/admin/
- https://adsecurity.org/?p=4277
- https://www.mandiant.com/resources/detecting-microsoft-365-azure-active-directory-backdoors
- https://docs.microsoft.com/en-us/azure/active-directory/roles/security-planning
- https://docs.microsoft.com/en-us/azure/role-based-access-control/elevate-access-global-admin
- https://attack.mitre.org/techniques/T1098/003/
Test Dataset
Replay any dataset to Splunk Enterprise by using our replay.py
tool or the UI.
Alternatively you can replay a dataset into a Splunk Attack Range
source | version: 2