windows community v1.0.0

winrnr.dll

winrnr.dll — Environment Variable hijacking (Microsoft)

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winrnr.dll
winrnr.dll

Sandbox: execFile · Timeout: 30s

Capabilities

security.defenseevasion.dll-hijack

Documentation

examples:

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

winrnr.dll

Vendor: Microsoft

Expected Location: %SYSTEM32%

Vulnerable Executables:

  • %SYSTEM32%\ftp.exe (Environment Variable)
  • %SYSTEM32%\hostname.exe (Environment Variable)
  • %SYSTEM32%\stordiag.exe (Environment Variable)
  • %PROGRAMFILES%\Mozilla Firefox\firefox.exe (Environment Variable)

Acknowledgement: Wietze

References