---
title: "Get DomainUser with PowerShell Script Block"
excerpt: "Domain Account, Account Discovery"
categories:
  - Endpoint
last_modified_at: 2021-08-24
toc: true
toc_label: ""
tags:
  - Domain Account
  - Discovery
  - Account Discovery
  - Discovery
  - Splunk Enterprise
  - Splunk Enterprise Security
  - Splunk Cloud
---



[Try in Splunk Security Cloud](https://www.splunk.com/en_us/cyber-security.html){: .btn .btn--success}

#### Description

The following analytic utilizes PowerShell Script Block Logging (EventCode=4104) to identify the execution of the `Get-DomainUser` commandlet. `GetDomainUser` is part of PowerView, a PowerShell tool used to perform enumeration on Windows domains. Red Teams and adversaries alike may use PowerView to enumerate domain users for situational awareness and Active Directory Discovery.

- **Type**: [TTP](https://github.com/splunk/security_content/wiki/Detection-Analytic-Types)
- **Product**: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
- **Datamodel**: 
- **Last Updated**: 2021-08-24
- **Author**: Teoderick Contreras, Mauricio Velazco, Splunk
- **ID**: 61994268-04f4-11ec-865c-acde48001122


#### [ATT&CK](https://attack.mitre.org/)

| ID             | Technique        |  Tactic             |
| -------------- | ---------------- |-------------------- |
| [T1087.002](https://attack.mitre.org/techniques/T1087/002/) | Domain Account | Discovery |

| [T1087](https://attack.mitre.org/techniques/T1087/) | Account Discovery | Discovery |

#### Search

```
`powershell` EventCode=4104 Message = "*Get-DomainUser*" 
| stats count min(_time) as firstTime max(_time) as lastTime by EventCode Message ComputerName User 
| `security_content_ctime(firstTime)` 
| `security_content_ctime(lastTime)` 
| `get_domainuser_with_powershell_script_block_filter`
```

#### Macros
The SPL above uses the following Macros:
* [powershell](https://github.com/splunk/security_content/blob/develop/macros/powershell.yml)
* [security_content_ctime](https://github.com/splunk/security_content/blob/develop/macros/security_content_ctime.yml)

Note that `get_domainuser_with_powershell_script_block_filter` is a empty macro by default. It allows the user to filter out any results (false positives) without editing the SPL.

#### Required field
* _time
* EventCode
* Message
* ComputerName
* User


#### How To Implement
The following Hunting analytic requires PowerShell operational logs to be imported. Modify the powershell macro as needed to match the sourcetype or add index. This analytic is specific to 4104, or PowerShell Script Block Logging.

#### Known False Positives
Administrators or power users may use this command for troubleshooting.

#### Associated Analytic story
* [Active Directory Discovery](/stories/active_directory_discovery)


#### Kill Chain Phase
* Reconnaissance



#### RBA

| Risk Score  | Impact      | Confidence   | Message      |
| ----------- | ----------- |--------------|--------------|
| 25.0 | 50 | 50 | powershell process having commandline $Message$ for user enumeration |


Note that risk score is calculated base on the following formula: `(Impact * Confidence)/100`



#### Reference

* [https://powersploit.readthedocs.io/en/latest/Recon/Get-DomainUser/](https://powersploit.readthedocs.io/en/latest/Recon/Get-DomainUser/)



#### Test Dataset
Replay any dataset to Splunk Enterprise by using our [`replay.py`](https://github.com/splunk/attack_data#using-replaypy) tool or the [UI](https://github.com/splunk/attack_data#using-ui).
Alternatively you can replay a dataset into a [Splunk Attack Range](https://github.com/splunk/attack_range#replay-dumps-into-attack-range-splunk-server)

* [https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1087.002/AD_discovery/windows-powershell.log](https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1087.002/AD_discovery/windows-powershell.log)



[*source*](https://github.com/splunk/security_content/tree/develop/detections/endpoint/get_domainuser_with_powershell_script_block.yml) \| *version*: **1**