Detectionlowtest
Replace Desktop Wallpaper by Powershell
An adversary may deface systems internal to an organization in an attempt to intimidate or mislead users. This may take the form of modifications to internal websites, or directly to user systems with the replacement of the desktop wallpaper
Convert In Phoenix Studio
Open this Sigma rule in the converter with the YAML preloaded and ready for backend selection.
Launch
Log Source
WindowsPowerShell Script
ProductWindows← raw: windows
CategoryPowerShell Script← raw: ps_script
Definition
Requirements: Script Block Logging must be enabled
Detection Logic
Detection Logic2 selectors
detection:
selection_1:
ScriptBlockText|contains|all:
- 'Get-ItemProperty'
- 'Registry::'
- 'HKEY_CURRENT_USER\Control Panel\Desktop\'
- 'WallPaper'
selection_2:
ScriptBlockText|contains: SystemParametersInfo(20,0,*,3)
condition: 1 of selection_*False Positives
Unknown
False positive likelihood has not been assessed. Additional context may be needed during triage.
References
MITRE ATT&CK
Tactics
Sub-techniques
Rule Metadata
Rule ID
c5ac6a1e-9407-45f5-a0ce-ca9a0806a287
Status
test
Level
low
Type
Detection
Created
Sun Dec 26
Author
Path
rules/windows/powershell/powershell_script/posh_ps_susp_wallpaper.yml
Raw Tags
attack.impactattack.t1491.001