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



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#### Description

The following analytic utilizes PowerShell Script Block Logging (EventCode=4104) to identify suspicious PowerShell execution. Script Block Logging captures the command sent to PowerShell, the full command to be executed. Upon enabling, logs will output to Windows event logs. Dependent upon volume, enable on critical endpoints or all. \
This analytic identifies Get-DomainTrust from PowerView in order to gather domain trust information. \
During triage, review parallel processes using an EDR product or 4688 events. It will be important to understand the timeline of events around this activity. Review the entire logged PowerShell script block.

- **Type**: TTP
- **Product**: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
- **Datamodel**: 
- **Last Updated**: 2021-08-24
- **Author**: Michael Haag, Splunk
- **ID**: 89275e7e-0548-11ec-bf75-acde48001122


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

| ID          | Technique   | Tactic         |
| ----------- | ----------- |--------------- |
| [T1482](https://attack.mitre.org/techniques/T1482/) | Domain Trust Discovery | Discovery |

#### Search

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

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


#### How To Implement
To successfully implement this analytic, you will need to enable PowerShell Script Block Logging on some or all endpoints. Additional setup here https://docs.splunk.com/Documentation/UBA/5.0.4.1/GetDataIn/AddPowerShell#Configure_module_logging_for_PowerShell.

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


#### Kill Chain Phase
* Reconnaissance


#### Known False Positives
It is possible certain system management frameworks utilize this command to gather trust information.


#### RBA

| Risk Score  | Impact      | Confidence   | Message      |
| ----------- | ----------- |--------------|--------------|
| 12.0 | 30 | 40 | Suspicious PowerShell Get-DomainTrust was identified on endpoint $ComputerName$ by user $user$. |




#### Reference

* [http://www.harmj0y.net/blog/redteaming/a-guide-to-attacking-domain-trusts/](http://www.harmj0y.net/blog/redteaming/a-guide-to-attacking-domain-trusts/)
* [https://docs.splunk.com/Documentation/UBA/5.0.4.1/GetDataIn/AddPowerShell#Configure_module_logging_for_PowerShell.](https://docs.splunk.com/Documentation/UBA/5.0.4.1/GetDataIn/AddPowerShell#Configure_module_logging_for_PowerShell.)
* [https://blog.palantir.com/tampering-with-windows-event-tracing-background-offense-and-defense-4be7ac62ac63](https://blog.palantir.com/tampering-with-windows-event-tracing-background-offense-and-defense-4be7ac62ac63)
* [https://static1.squarespace.com/static/552092d5e4b0661088167e5c/t/59c1814829f18782e24f1fe2/1505853768977/Windows+PowerShell+Logging+Cheat+Sheet+ver+Sept+2017+v2.1.pdf](https://static1.squarespace.com/static/552092d5e4b0661088167e5c/t/59c1814829f18782e24f1fe2/1505853768977/Windows+PowerShell+Logging+Cheat+Sheet+ver+Sept+2017+v2.1.pdf)
* [https://www.crowdstrike.com/blog/investigating-powershell-command-and-script-logging/](https://www.crowdstrike.com/blog/investigating-powershell-command-and-script-logging/)



#### 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/T1482/discovery/windows-powershell.log](https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1482/discovery/windows-powershell.log)



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