mirror of
https://github.com/splunk/security_content
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pyth0n1c
60 lines
2.2 KiB
YAML
60 lines
2.2 KiB
YAML
name: Windows PowerShell Export Certificate
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id: 5e38ded4-c964-41f4-8cb6-4a1a53c6929f
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version: 1
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date: '2023-02-01'
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author: Michael Haag, Splunk
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status: production
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type: Anomaly
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description: The following analytic identifies the PowerShell Cmdlet export-certificate
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utilizing Script Block Logging. This particular behavior is related to an adversary
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attempting to steal certificates local to the Windows endpoint within the Certificate
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Store.
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data_source:
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- Powershell 4104
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search: '`powershell` EventCode=4104 ScriptBlockText IN ("*export-certificate*") |
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rename Computer as dest | stats count min(_time) as firstTime max(_time) as lastTime
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by EventCode ScriptBlockText dest user_id | `security_content_ctime(firstTime)`
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| `security_content_ctime(lastTime)` | `windows_powershell_export_certificate_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: It is possible administrators or scripts may run these commands,
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filtering may be required.
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references:
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- https://dev.to/iamthecarisma/managing-windows-pfx-certificates-through-powershell-3pj
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- https://learn.microsoft.com/en-us/powershell/module/pki/export-certificate?view=windowsserver2022-ps
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tags:
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analytic_story:
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- Windows Certificate Services
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asset_type: Endpoint
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confidence: 60
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impact: 60
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message: A PowerShell Cmdlet related to exporting a Certificate was ran on $dest$,
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attempting to export a certificate.
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mitre_attack_id:
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- T1552.004
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- T1552
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- T1649
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observable:
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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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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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- dest
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- EventCode
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risk_score: 36
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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/T1649/atomic_red_team/4104_export_certificate.log
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source: XmlWinEventLog:Microsoft-Windows-PowerShell/Operational
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sourcetype: xmlwineventlog
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