ID | Technique | Tactic |
---|---|---|
T1087 | Account Discovery | Discovery |
T1087.002 | Domain Account | Discovery |
Detection: Windows Find Domain Organizational Units with GetDomainOU
Description
The following analytic detects the execution of the Get-DomainOU
cmdlet, a part of the PowerView toolkit used for Windows domain enumeration. It leverages PowerShell Script Block Logging (EventCode=4104) to identify this activity. Detecting Get-DomainOU
usage is significant as adversaries may use it to gather information about organizational units within Active Directory, which can facilitate lateral movement or privilege escalation. If confirmed malicious, this activity could allow attackers to map the domain structure, aiding in further exploitation and persistence within the network.
Search
1`powershell` EventCode=4104 ScriptBlockText = "*Get-DomainOU*"
2| stats count min(_time) as firstTime max(_time) as lastTime by EventCode ScriptBlockText Computer UserID
3| rename Computer as dest, UserID as user
4| `security_content_ctime(firstTime)`
5| `security_content_ctime(lastTime)`
6| `windows_find_domain_organizational_units_with_getdomainou_filter`
Data Source
Name | Platform | Sourcetype | Source | Supported App |
---|---|---|---|---|
Powershell Script Block Logging 4104 | Windows | 'xmlwineventlog' |
'XmlWinEventLog:Microsoft-Windows-PowerShell/Operational' |
N/A |
Macros Used
Name | Value |
---|---|
powershell | (source=WinEventLog:Microsoft-Windows-PowerShell/Operational OR source="XmlWinEventLog:Microsoft-Windows-PowerShell/Operational") |
windows_find_domain_organizational_units_with_getdomainou_filter | search * |
windows_find_domain_organizational_units_with_getdomainou_filter
is an empty macro by default. It allows the user to filter out any results (false positives) without editing the SPL.
Annotations
Default Configuration
This detection is configured by default in Splunk Enterprise Security to run with the following settings:
Setting | Value |
---|---|
Disabled | true |
Cron Schedule | 0 * * * * |
Earliest Time | -70m@m |
Latest Time | -10m@m |
Schedule Window | auto |
Creates Notable | Yes |
Rule Title | %name% |
Rule Description | %description% |
Notable Event Fields | user, dest |
Creates Risk Event | True |
Implementation
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 may leverage PowerSploit tools for legitimate reasons, filter as needed.
Associated Analytic Story
Risk Based Analytics (RBA)
Risk Message | Risk Score | Impact | Confidence |
---|---|---|---|
Suspicious PowerShell Get-DomainOU was identified on endpoint $dest$ by user $user$. | 25 | 50 | 50 |
References
-
https://powersploit.readthedocs.io/en/latest/Recon/Get-DomainOU/
-
https://book.hacktricks.xyz/windows-hardening/basic-powershell-for-pentesters/powerview
Detection Testing
Test Type | Status | Dataset | Source | Sourcetype |
---|---|---|---|---|
Validation | ✅ Passing | N/A | N/A | N/A |
Unit | ✅ Passing | Dataset | XmlWinEventLog:Microsoft-Windows-PowerShell/Operational |
xmlwineventlog |
Integration | ✅ Passing | Dataset | XmlWinEventLog:Microsoft-Windows-PowerShell/Operational |
xmlwineventlog |
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: GitHub | Version: 2