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P4T12ICK
65 lines
2.5 KiB
YAML
65 lines
2.5 KiB
YAML
name: GetDomainComputer with PowerShell
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id: ed550c19-712e-43f6-bd19-6f58f61b3a5e
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version: 1
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date: '2021-09-07'
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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: This analytic looks for the execution of `powershell.exe` with command-line
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arguments utilized to discover remote systems. `Get-DomainComputer` is part of PowerView,
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a PowerShell tool used to perform enumeration on Windows domains. Red Teams and
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adversaries alike may leverage PowerView to enumerate domain groups for situational
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awareness and Active Directory Discovery.
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data_source:
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- Sysmon Event ID 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="powershell.exe")
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(Processes.process=*Get-DomainComputer*) by Processes.dest Processes.user Processes.parent_process
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Processes.process_name Processes.process Processes.process_id Processes.parent_process_id
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| `drop_dm_object_name(Processes)` | `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)`
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| `getdomaincomputer_with_powershell_filter`'
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how_to_implement: To successfully implement this search you need to be ingesting information
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on process that include the name of the process responsible for the changes from
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your endpoints into the `Endpoint` datamodel in the `Processes` node.
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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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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 enumeration 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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- Processes.dest
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- Processes.user
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- Processes.parent_process_name
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- Processes.parent_process
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- Processes.original_file_name
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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_path
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- Processes.process_path
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- Processes.parent_process_id
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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/T1018/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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