mirror of
https://github.com/splunk/security_content
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Michael Haag
66 lines
2.2 KiB
YAML
66 lines
2.2 KiB
YAML
name: Windows Powershell Import Applocker Policy
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id: 102af98d-0ca3-4aa4-98d6-7ab2b98b955a
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version: 1
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date: '2022-06-30'
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author: Teoderick Contreras, Splunk
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type: TTP
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datamodel:
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- Endpoint
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description: The following analytic is to identify the imports of Windows PowerShell Applocker commandlets.
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This technique was seen in Azorult malware where it drops an xml Applocker policy that will deny several AV product and then loaded using PowerShell Applocker
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commandlet.
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search: '`powershell` EventCode=4104 ScriptBlockText="*Import-Module Applocker*" ScriptBlockText="*Set-AppLockerPolicy *" ScriptBlockText="* -XMLPolicy *"
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| stats count min(_time) as firstTime max(_time) as lastTime by EventCode ScriptBlockText Computer user_id
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| `security_content_ctime(firstTime)`
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| `security_content_ctime(lastTime)`
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| `windows_powershell_import_applocker_policy_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 may execute this command that may cause some false positive.
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references:
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- https://app.any.run/tasks/a6f2ffe2-e6e2-4396-ae2e-04ea0143f2d8/
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tags:
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analytic_story:
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- Azorult
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asset_type: Endpoint
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cis20:
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- CIS 3
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- CIS 5
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- CIS 16
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confidence: 70
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context:
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- Source:Endpoint
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- Stage:Defense Evasion
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dataset:
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- https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1059.001/import_applocker_policy/windows-powershell-xml2.log
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impact: 70
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kill_chain_phases:
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- Exploitation
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message: A PowerShell script contains Import Applocker Policy command $ScriptBlockText$
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with EventCode $EventCode$ in host $Computer$
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mitre_attack_id:
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- T1059.001
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nist:
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- DE.CM
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observable:
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- name: Computer
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type: Hostname
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role:
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- Victim
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- name: User
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type: User
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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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- Computer
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- EventCode
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risk_score: 49
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security_domain: endpoint
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