Windows Azure PowerShell Module Installation Via PowerShell Script

name: Windows Azure PowerShell Module Installation Via PowerShell Script
id: 344bed10-9a8b-4398-8bf3-ec9114125260
version: 2
creation_date: '2026-05-05'
modification_date: '2026-05-13'
author: Raven Tait, Splunk
status: production
type: Anomaly
description: |-
    This analytic detects the installation of Azure AD and cloud management modules via PowerShell Script Block Logging.
    Tools such as AADInternals, AzureAD, MSOnline, and Az.Resources provide deep access to Azure Active Directory objects, user accounts, service principals, and tenant configurations making them high-value targets for adversaries conducting reconnaissance, privilege escalation, or persistence operations post-compromise.
data_source:
    - Powershell Script Block Logging 4104
search: |-
    `powershell`
    EventID="4104"
    ScriptBlockText IN (
        "*Install-Module -Name AADInternals*",
        "*Install-Module -Name Az.Resources*",
        "*Install-Module -Name AzureAd*",
        "*Install-Module -Name MSOnline*",
        "*Install-Module AADInternals*",
        "*Install-Module Az.Resources*",
        "*Install-Module AzureAd*",
        "*Install-Module MSOnline*"
    )
    | fillnull
    | stats count min(_time) as firstTime
            max(_time) as lastTime
      by Computer EventID ScriptBlockText signature signature_id
         user_id vendor_product Guid Opcode
         Name Path ProcessID ScriptBlockId
    
    | rename Computer as dest
    | `security_content_ctime(firstTime)`
    | `security_content_ctime(lastTime)`
    | `windows_azure_powershell_module_installation_via_powershell_script_filter`
how_to_implement: The detection is based on data that originates from Endpoint Detection and Response (EDR) agents. These agents are designed to provide security-related telemetry from the endpoints where the agent is installed. To implement this search, you must ingest logs that contain the process GUID, process name, and parent process. Additionally, you must ingest complete command-line executions. These logs must be processed using the appropriate Splunk Technology Add-ons that are specific to the EDR product. The logs must also be mapped to the `Processes` node of the `Endpoint` data model. Use the Splunk Common Information Model (CIM) to normalize the field names and speed up the data modeling process.
known_false_positives: Legitimate administrators often install these modules for managing Azure environments. Filter alerts for authorized personnel and approved administrative activities.
intermediate_findings:
    entities:
        - field: dest
          type: system
          score: 50
          message: Potential Azure PowerShell module installation observed on $dest$ via script block $ScriptBlockId$.
analytic_story:
    - Azure Active Directory Account Takeover
    - Azure Active Directory Persistence
    - Azure Active Directory Privilege Escalation
asset_type: Endpoint
mitre_attack_id:
    - T1078
    - T1021.007
    - T1136.003
    - T1098
    - T1069.003
product:
    - Splunk Enterprise
    - Splunk Enterprise Security
    - Splunk Cloud
category: endpoint
security_domain: endpoint