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Description

The following analytic detects the execution of the Get-ForestDomain cmdlet, a component of the PowerView toolkit used for Windows domain enumeration. It leverages PowerShell Script Block Logging (EventCode=4104) to identify this activity. Detecting Get-ForestDomain is significant because adversaries and Red Teams use it to gather detailed information about Active Directory forest and domain configurations. If confirmed malicious, this activity could enable attackers to understand the domain structure, facilitating lateral movement or privilege escalation within the environment.

  • Type: TTP

  • Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud

  • Last Updated: 2024-05-16
  • Author: Gowthamaraj Rajendran, Mauricio Velazco, Splunk
  • ID: a14803b2-4bd9-4c08-8b57-c37980edebe8

Annotations

ATT&CK

ATT&CK

ID Technique Tactic
T1087 Account Discovery Discovery
T1087.002 Domain Account Discovery
Kill Chain Phase
  • Exploitation
NIST
  • DE.CM
CIS20
  • CIS 10
CVE 


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`powershell` EventCode=4104 ScriptBlockText = "*Get-ForestDomain*" 
| stats count min(_time) as firstTime max(_time) as lastTime by EventCode ScriptBlockText Computer UserID 
| rename Computer as dest, UserID as user 
| `security_content_ctime(firstTime)` 
| `security_content_ctime(lastTime)` 
| `windows_forest_discovery_with_getforestdomain_filter`

Macros

The SPL above uses the following Macros:

:information_source: windows_forest_discovery_with_getforestdomain_filter is a empty macro by default. It allows the user to filter out any results (false positives) without editing the SPL.

Required fields

List of fields required to use this analytic.

  • _time
  • EventCode
  • Message
  • Computer
  • UserID

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 may leverage PowerSploit tools for legitimate reasons, filter as needed.

Associated Analytic Story

RBA

Risk Score Impact Confidence Message
25.0 50 50 Suspicious PowerShell Get-ForestDomain was identified on endpoint $dest$ by user $user$.

:information_source: The Risk Score is calculated by the following formula: Risk Score = (Impact * Confidence/100). Initial Confidence and Impact is set by the analytic author.

Reference

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: 2