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P4T12ICK
58 lines
2.2 KiB
YAML
58 lines
2.2 KiB
YAML
name: GetDomainComputer with PowerShell Script Block
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id: f64da023-b988-4775-8d57-38e512beb56e
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version: 2
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date: '2022-05-02'
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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 utilizes PowerShell Script Block Logging (EventCode=4104)
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to identify the execution of the `Get-DomainComputer` commandlet. `GetDomainComputer`
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is part of PowerView, a PowerShell tool used to perform enumeration on Windows domains.
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Red Teams and adversaries alike may use PowerView to enumerate domain computers
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for situational awareness and Active Directory Discovery.
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data_source:
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- Powershell 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 | `security_content_ctime(firstTime)` | `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 $Computer$ by $user$
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mitre_attack_id:
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- T1018
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observable:
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- name: Computer
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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: 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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