38 lines
1.4 KiB
YAML
38 lines
1.4 KiB
YAML
title: Winlogon Helper DLL
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author: Timur Zinniatullin, oscd.community
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date: 2019/10/21
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description: Winlogon.exe is a Windows component responsible for actions at logon/logoff
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as well as the secure attention sequence (SAS) triggered by Ctrl-Alt-Delete. Registry
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entries in HKLM\Software[Wow6432Node]Microsoft\Windows NT\CurrentVersion\Winlogon\
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and HKCU\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\ are used to manage
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additional helper programs and functionalities that support Winlogon. Malicious
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modifications to these Registry keys may cause Winlogon to load and execute malicious
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DLLs and/or executables.
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detection:
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SELECTION_1:
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ScriptBlockText: '*CurrentVersion\Winlogon*'
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SELECTION_2:
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ScriptBlockText: '*Set-ItemProperty*'
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SELECTION_3:
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ScriptBlockText: '*New-Item*'
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condition: (SELECTION_1 and (SELECTION_2 or SELECTION_3))
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falsepositives:
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- Unknown
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id: 851c506b-6b7c-4ce2-8802-c703009d03c0
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level: medium
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logsource:
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category: ps_script
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definition: Script block logging must be enabled
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product: windows
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modified: 2021/10/16
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references:
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- https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1547.004/T1547.004.md
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status: experimental
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tags:
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- attack.persistence
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- attack.t1547.004
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- attack.t1004
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yml_filename: powershell_winlogon_helper_dll.yml
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yml_path: /Users/user/Documents/YamatoSecurity/sigma/rules/windows/powershell/powershell_script
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