windows community v1.0.0

vstdlib_s64.dll

vstdlib_s64.dll — Sideloading hijacking (Valve)

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vstdlib_s64.dll
vstdlib_s64.dll

Sandbox: execFile · Timeout: 30s

Capabilities

security.defenseevasion.dll-hijack

Documentation

examples:

  • description: "Place malicious vstdlib_s64.dll in the search order location" command: "copy malicious.dll "%PROGRAMFILES%\Steam\vstdlib_s64.dll""
  • description: "Execute the vulnerable binary to trigger the hijack" command: ""%PROGRAMFILES%\Steam\steamerrorreporter64.exe""

vstdlib_s64.dll

Vendor: Valve

Expected Location: %PROGRAMFILES%\Steam

Vulnerable Executables:

  • %PROGRAMFILES%\Steam\steamerrorreporter64.exe (Sideloading)

Acknowledgement: Unit 42

References