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https://github.com/splunk/security_content
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ljstella
72 lines
3.5 KiB
YAML
72 lines
3.5 KiB
YAML
name: GetDomainComputer with PowerShell Script Block
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id: f64da023-b988-4775-8d57-38e512beb56e
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version: 8
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date: '2025-06-24'
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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:
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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:
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'`powershell` EventCode=4104 (ScriptBlockText = "*Get-DomainComputer*") |
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fillnull | stats count min(_time) as firstTime max(_time) as lastTime by dest signature
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signature_id user_id vendor_product EventID Guid Opcode Name Path ProcessID ScriptBlockId
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ScriptBlockText | `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)`
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| `getdomaincomputer_with_powershell_script_block_filter`'
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how_to_implement:
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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://help.splunk.com/en/security-offerings/splunk-user-behavior-analytics/get-data-in/5.4.1/add-other-data-to-splunk-uba/configure-powershell-logging-to-see-powershell-anomalies-in-splunk-uba.
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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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drilldown_searches:
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- name: View the detection results for - "$dest$"
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search: '%original_detection_search% | search dest = "$dest$"'
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earliest_offset: $info_min_time$
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latest_offset: $info_max_time$
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- name: View risk events for the last 7 days for - "$dest$"
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search:
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'| from datamodel Risk.All_Risk | search normalized_risk_object IN ("$dest$")
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starthoursago=168 | stats count min(_time) as firstTime max(_time) as lastTime
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values(search_name) as "Search Name" values(risk_message) as "Risk Message" values(analyticstories)
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as "Analytic Stories" values(annotations._all) as "Annotations" values(annotations.mitre_attack.mitre_tactic)
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as "ATT&CK Tactics" by normalized_risk_object | `security_content_ctime(firstTime)`
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| `security_content_ctime(lastTime)`'
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earliest_offset: $info_min_time$
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latest_offset: $info_max_time$
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rba:
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message: Remote system discovery with PowerView on $dest$ by $user_id$
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risk_objects:
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- field: dest
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type: system
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score: 24
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threat_objects: []
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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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mitre_attack_id:
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- T1018
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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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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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