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duser.dll

duser.dll — Sideloading hijacking (Microsoft)

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duser.dll
duser.dll

Sandbox: execFile · Timeout: 30s

Capabilities

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

Documentation

examples:

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

duser.dll

Vendor: Microsoft

Expected Location: %SYSTEM32%

Vulnerable Executables:

  • %SYSTEM32%\bdeunlock.exe (Sideloading)
  • %SYSTEM32%\displayswitch.exe (Sideloading)
  • %SYSTEM32%\easeofaccessdialog.exe (Sideloading)
  • %SYSTEM32%\lockscreencontentserver.exe (Sideloading)
  • %SYSTEM32%\mmc.exe (Sideloading)
  • %SYSTEM32%\msdt.exe (Sideloading) [AutoElevate]
  • %SYSTEM32%\osk.exe (Sideloading)
  • %SYSTEM32%\rekeywiz.exe (Sideloading)
  • %SYSTEM32%\sessionmsg.exe (Sideloading)
  • %SYSTEM32%\taskmgr.exe (Sideloading)
  • %SYSTEM32%\utilman.exe (Sideloading)

Acknowledgement: Wietze

Acknowledgement: Chris Spehn

References