mirror of
https://github.com/splunk/security_content
synced 2026-06-08 17:32:49 +00:00
Bhavin Patel
63 lines
2.5 KiB
YAML
63 lines
2.5 KiB
YAML
name: GetDomainComputer with PowerShell Script Block
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id: f64da023-b988-4775-8d57-38e512beb56e
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version: 3
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date: '2024-05-12'
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author: 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 the `Get-DomainComputer`
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commandlet using PowerShell Script Block Logging (EventCode=4104). This commandlet
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is part of PowerView, a tool often used for enumerating domain computers within
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Windows environments. The detection leverages script block text analysis to identify
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this specific command. Monitoring this activity is crucial as it can indicate an
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adversary's attempt to gather information about domain computers, which is a common
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step in Active Directory reconnaissance. If confirmed malicious, this activity could
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lead to further network enumeration and potential lateral movement within the domain.
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data_source:
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- Powershell Script Block Logging 4104
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search: '`powershell` EventCode=4104 (ScriptBlockText = "*Get-DomainComputer*") |
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stats count min(_time) as firstTime max(_time) as lastTime by Opcode Computer UserID
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EventCode ScriptBlockText | rename Computer as dest | rename UserID as user | `security_content_ctime(firstTime)`
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| `getdomaincomputer_with_powershell_script_block_filter`'
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how_to_implement: To successfully implement this analytic, you will need to enable
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PowerShell Script Block Logging on some or all endpoints. Additional setup here
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https://docs.splunk.com/Documentation/UBA/5.0.4.1/GetDataIn/AddPowerShell#Configure_module_logging_for_PowerShell.
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known_false_positives: Administrators or power users may use PowerView for troubleshooting.
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references:
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- https://attack.mitre.org/techniques/T1018/
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- https://powersploit.readthedocs.io/en/latest/Recon/Get-DomainComputer/
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tags:
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analytic_story:
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- Active Directory Discovery
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asset_type: Endpoint
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confidence: 80
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impact: 30
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message: Remote system discovery with PowerView on $dest$ by $user$
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mitre_attack_id:
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- T1018
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observable:
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- name: dest
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type: Endpoint
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role:
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- Victim
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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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- ScriptBlockText
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- Opcode
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- Computer
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- UserID
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- EventCode
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risk_score: 24
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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/T1059.001/powershell_script_block_logging/sbl_xml.log
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source: XmlWinEventLog:Microsoft-Windows-PowerShell/Operational
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sourcetype: xmlwineventlog
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