windows community v1.0.0

propsys.dll

propsys.dll — Sideloading, Environment Variable hijacking (Microsoft)

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propsys.dll
propsys.dll

Sandbox: execFile · Timeout: 30s

Capabilities

security.defenseevasion.dll-hijack
security.privilegeescalation.dll-hijack

Documentation

examples:

  • description: "Place malicious propsys.dll in the search order location" command: "copy malicious.dll "%SYSTEM32%\propsys.dll""
  • description: "Execute the vulnerable binary to trigger the hijack" command: ""%SYSTEM32%\bootim.exe""

propsys.dll

Vendor: Microsoft

Expected Location: %SYSTEM32%

Vulnerable Executables:

  • %SYSTEM32%\bootim.exe (Sideloading)
  • %SYSTEM32%\calc.exe (Sideloading)
  • %SYSTEM32%\colorcpl.exe (Sideloading)
  • %SYSTEM32%\compmgmtlauncher.exe (Sideloading)
  • %SYSTEM32%\computerdefaults.exe (Sideloading) [AutoElevate]
  • %SYSTEM32%\customshellhost.exe (Sideloading)
  • %SYSTEM32%\dpiscaling.exe (Sideloading)
  • %SYSTEM32%\dsregcmd.exe (Sideloading)
  • %SYSTEM32%\dxpserver.exe (Sideloading)
  • %SYSTEM32%\fodhelper.exe (Sideloading) [AutoElevate]
  • %SYSTEM32%\fondue.exe (Sideloading)
  • %SYSTEM32%\fxssvc.exe (Sideloading)
  • %SYSTEM32%\fxsunatd.exe (Sideloading) [AutoElevate]
  • %SYSTEM32%\mobsync.exe (Sideloading)
  • %SYSTEM32%\mspaint.exe (Sideloading)
  • %SYSTEM32%\netplwiz.exe (Sideloading) [AutoElevate]
  • %SYSTEM32%\optionalfeatures.exe (Sideloading) [AutoElevate]
  • %SYSTEM32%\pinenrollmentbroker.exe (Sideloading)
  • %SYSTEM32%\printbrmui.exe (Sideloading)
  • %SYSTEM32%\printui.exe (Sideloading) [AutoElevate]
  • %SYSTEM32%\proximityuxhost.exe (Sideloading)
  • %SYSTEM32%\quickassist.exe (Sideloading)
  • %SYSTEM32%\rdpclip.exe (Sideloading)
  • %SYSTEM32%\resmon.exe (Sideloading)
  • %SYSTEM32%\sdclt.exe (Sideloading) [AutoElevate]
  • %SYSTEM32%\settingsynchost.exe (Sideloading)
  • %SYSTEM32%\slui.exe (Sideloading)
  • %SYSTEM32%\synchost.exe (Sideloading)
  • %SYSTEM32%\systemsettingsadminflows.exe (Sideloading) [AutoElevate]
  • %SYSTEM32%\wfs.exe (Sideloading)
  • %SYSTEM32%\wkspbroker.exe (Sideloading)
  • %SYSTEM32%\workfolders.exe (Sideloading)
  • %SYSTEM32%\wpnpinst.exe (Sideloading)
  • %SYSTEM32%\write.exe (Sideloading)
  • %SYSTEM32%\certreq.exe (Environment Variable)
  • %SYSTEM32%\cleanmgr.exe (Environment Variable)
  • %SYSTEM32%\control.exe (Environment Variable)
  • %SYSTEM32%\ddodiag.exe (Environment Variable)
  • %SYSTEM32%\dfrgui.exe (Environment Variable)
  • %SYSTEM32%\explorer.exe (Environment Variable)
  • %SYSTEM32%\fxscover.exe (Environment Variable)
  • %SYSTEM32%\licensingdiag.exe (Environment Variable)
  • %SYSTEM32%\msdt.exe (Environment Variable)
  • %SYSTEM32%\notepad.exe (Environment Variable)
  • %SYSTEM32%\powershell.exe (Environment Variable)
  • %SYSTEM32%\presentationsettings.exe (Environment Variable)
  • %SYSTEM32%\tabcal.exe (Environment Variable)
  • %SYSTEM32%\verifier.exe (Environment Variable)
  • %PROGRAMFILES%\Google\Chrome\Application\chrome.exe (Environment Variable)
  • %PROGRAMFILES%\Microsoft\Edge\Application\msedge.exe (Environment Variable)
  • %PROGRAMFILES%\Mozilla Firefox\firefox.exe (Environment Variable)
  • %APPDATA%\Zoom\bin\zoom.exe (Environment Variable)
  • %PROGRAMFILES%\WindowsApps\MicrosoftTeams%VERSION%\msteams.exe (Environment Variable)
  • %PROGRAMFILES%\Microsoft Office\root\Office%VERSION%\excel.exe (Environment Variable)
  • %PROGRAMFILES%\Microsoft Office\root\Office%VERSION%\graph.exe (Environment Variable)
  • %PROGRAMFILES%\Microsoft Office\root\Office%VERSION%\msoev.exe (Environment Variable)
  • %PROGRAMFILES%\Microsoft Office\root\Office%VERSION%\msotd.exe (Environment Variable)
  • %PROGRAMFILES%\Microsoft Office\root\Office%VERSION%\onenote.exe (Environment Variable)
  • %PROGRAMFILES%\Microsoft Office\root\Office%VERSION%\outlook.exe (Environment Variable)
  • %PROGRAMFILES%\Microsoft Office\root\Office%VERSION%\powerpnt.exe (Environment Variable)

Acknowledgement: Wietze

Acknowledgement: Chris Spehn

References