GetDomainController with PowerShell Script Block
Description
The following analytic utilizes PowerShell Script Block Logging (EventCode=4104) to identify the execution of the Get-DomainController
commandlet. Get-DomainController
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 computers for situational awareness and Active Directory Discovery.
- Type: TTP
-
Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
- Last Updated: 2021-09-02
- Author: Mauricio Velazco, Splunk
- ID: 676b600a-a94d-4951-b346-11329431e6c1
Annotations
ATT&CK
ID | Technique | Tactic |
---|---|---|
T1018 | Remote System Discovery | Discovery |
Kill Chain Phase
- Reconnaissance
NIST
CIS20
CVE
Search
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`powershell` EventCode=4104 (Message = "*Get-DomainController*")
| stats count min(_time) as firstTime max(_time) as lastTime by EventCode Message ComputerName User
| `security_content_ctime(firstTime)`
| `getdomaincontroller_with_powershell_script_block_filter`
Macros
The SPL above uses the following Macros:
Note that getdomaincontroller_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
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.
Known False Positives
Administrators or power users may use this PowerShell commandlet for troubleshooting.
Associated Analytic story
RBA
Risk Score | Impact | Confidence | Message |
---|---|---|---|
24.0 | 30 | 80 | Remote system discovery with PowerView on $dest$ by $user$ |
Reference
- https://attack.mitre.org/techniques/T1018/
- https://powersploit.readthedocs.io/en/latest/Recon/Get-DomainController/
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: 1