mirror of
https://github.com/splunk/security_content
synced 2026-06-08 17:32:49 +00:00
Bhavin Patel
85 lines
3.5 KiB
YAML
85 lines
3.5 KiB
YAML
name: Get DomainUser with PowerShell
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id: 9a5a41d6-04e7-11ec-923c-acde48001122
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version: 2
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date: '2024-05-22'
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author: Teoderick Contreras, Mauricio Velazco, Splunk
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status: production
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type: TTP
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description: The following analytic detects the execution of `powershell.exe` with
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command-line arguments used to enumerate domain users via the `Get-DomainUser` command.
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This detection leverages data from Endpoint Detection and Response (EDR) agents,
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focusing on process names and command-line executions mapped to the `Processes`
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node of the `Endpoint` data model. This activity is significant as it indicates
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potential reconnaissance efforts by adversaries or Red Teams using PowerView for
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Active Directory discovery. If confirmed malicious, this could allow attackers to
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gain situational awareness and identify valuable targets within the domain, potentially
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leading to further exploitation.
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data_source:
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- Sysmon EventID 1
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search: '| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time)
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as lastTime from datamodel=Endpoint.Processes where (Processes.process_name="cmd.exe"
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OR Processes.process_name="powershell*") AND Processes.process = "*Get-DomainUser*"
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by Processes.dest Processes.user Processes.parent_process Processes.process_name
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Processes.process Processes.process_id Processes.parent_process_id Processes.parent_process_name
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| `drop_dm_object_name(Processes)` | `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)`
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| `get_domainuser_with_powershell_filter`'
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how_to_implement: The detection is based on data that originates from Endpoint Detection
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and Response (EDR) agents. These agents are designed to provide security-related
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telemetry from the endpoints where the agent is installed. To implement this search,
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you must ingest logs that contain the process GUID, process name, and parent process.
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Additionally, you must ingest complete command-line executions. These logs must
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be processed using the appropriate Splunk Technology Add-ons that are specific to
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the EDR product. The logs must also be mapped to the `Processes` node of the `Endpoint`
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data model. Use the Splunk Common Information Model (CIM) to normalize the field
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names and speed up the data modeling process.
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known_false_positives: Administrators or power users may use this command for troubleshooting.
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references:
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- https://powersploit.readthedocs.io/en/latest/Recon/Get-DomainUser/
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tags:
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analytic_story:
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- Active Directory Discovery
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- CISA AA23-347A
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asset_type: Endpoint
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confidence: 50
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impact: 50
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message: an instance of process $process_name$ with commandline $process$ in $dest$
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mitre_attack_id:
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- T1087.002
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- T1087
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observable:
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- name: user
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type: User
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role:
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- Victim
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- name: dest
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type: Hostname
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role:
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- Victim
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- name: parent_process_name
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type: Process
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role:
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- Parent Process
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product:
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- Splunk Enterprise
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- Splunk Enterprise Security
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- Splunk Cloud
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required_fields:
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- _time
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- Processes.dest
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- Processes.user
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- Processes.parent_process
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- Processes.process_name
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- Processes.process
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- Processes.process_id
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- Processes.parent_process_id
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- Processes.parent_process_name
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risk_score: 25
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security_domain: endpoint
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tests:
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- name: True Positive Test
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attack_data:
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- data:
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https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1087.002/AD_discovery/windows-sysmon.log
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source: XmlWinEventLog:Microsoft-Windows-Sysmon/Operational
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sourcetype: xmlwineventlog
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