Elevated Group Discovery with PowerView
Description
The following analytic utilizes PowerShell Script Block Logging (EventCode=4104) to identify the execution of the Get-DomainGroupMember
commandlet. Get-DomainGroupMember
is part of PowerView, a PowerShell tool used to perform enumeration on Windows domains. As the name suggests, Get-DomainGroupMember
is used to list the members of an specific domain group. Red Teams and adversaries alike use PowerView to enumerate elevated domain groups for situational awareness and Active Directory Discovery to identify high privileged users.
- Type: Hunting
-
Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
- Last Updated: 2021-08-25
- Author: Mauricio Velazco, Splunk
- ID: 10d62950-0de5-4199-a710-cff9ea79b413
Annotations
ATT&CK
Kill Chain Phase
- Exploitation
NIST
- DE.AE
CIS20
- CIS 10
CVE
Search
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`powershell` EventCode=4104 (Message = "*Get-DomainGroupMember*") AND Message IN ("*Domain Admins*","*Enterprise Admins*", "*Schema Admins*", "*Account Operators*" , "*Server Operators*", "*Protected Users*", "*Dns Admins*")
| stats count min(_time) as firstTime max(_time) as lastTime by EventCode Message ComputerName User
| rename ComputerName as dest, User as user
| `security_content_ctime(firstTime)`
| `elevated_group_discovery_with_powerview_filter`
Macros
The SPL above uses the following Macros:
elevated_group_discovery_with_powerview_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
- 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 PowerView for troubleshooting.
Associated Analytic Story
RBA
Risk Score | Impact | Confidence | Message |
---|---|---|---|
21.0 | 30 | 70 | Elevated group discovery using PowerView on $dest$ by $user$ |
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
- https://attack.mitre.org/techniques/T1069/002/
- https://powersploit.readthedocs.io/en/latest/Recon/Get-DomainGroupMember/
- https://docs.microsoft.com/en-us/windows-server/identity/ad-ds/plan/security-best-practices/appendix-b–privileged-accounts-and-groups-in-active-directory
- https://attack.mitre.org/techniques/T1069/002/
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