Nasreddine Bencherchali
598d29f811
chore: change tags, date, modified fields to comply with v2 of the Sigma spec. chore: update the related type from `obsoletes` to `obsolete`. chore: update local json schema to the latest version.
31 lines
1.1 KiB
YAML
31 lines
1.1 KiB
YAML
title: Replace Desktop Wallpaper by Powershell
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id: c5ac6a1e-9407-45f5-a0ce-ca9a0806a287
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status: test
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description: |
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An adversary may deface systems internal to an organization in an attempt to intimidate or mislead users.
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This may take the form of modifications to internal websites, or directly to user systems with the replacement of the desktop wallpaper
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references:
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- https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1491.001/T1491.001.md
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author: frack113
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date: 2021-12-26
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tags:
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- attack.impact
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- attack.t1491.001
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logsource:
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product: windows
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category: ps_script
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definition: 'Requirements: Script Block Logging must be enabled'
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detection:
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selection_1:
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ScriptBlockText|contains|all:
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- 'Get-ItemProperty'
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- 'Registry::'
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- 'HKEY_CURRENT_USER\Control Panel\Desktop\'
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- 'WallPaper'
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selection_2:
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ScriptBlockText|contains: SystemParametersInfo(20,0,*,3)
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condition: 1 of selection_*
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falsepositives:
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- Unknown
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level: low
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