Added ymls for setupupc.exe and xpsrchvw.exe#498
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Contribute to lolbas project by submitting a new microsoft binary named setupugc.exe (Setup Unattend Generic Command Processor) which reads command entries from HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\ UnattendSettings\Setup-Unattend-Settings\RunSynchronous\<N>\Path and executes them via CreateProcessW when invoked with a Windows setup pass argument (e.g. specialize).
Contribute to the LOLBAS project by submitting a new Microsoft-signed binary: xpsrchvw.exe (Windows XPS Viewer). xpsrchvw.exe is vulnerable to DLL search order hijacking. When copied from C:\Windows\System32\ to a user-writable directory and executed, it resolves DLLs from its application directory before falling back to System32. Placing a malicious WINMM.dll in the same directory as the copied binary causes it to be loaded and executed under the context of the Microsoft-signed process, allowing an attacker to proxy code execution and mask process parentage. This technique requires only User-level privileges and abuses legitimate Windows DLL resolution behaviour (MITRE T1574.001). A proof-of-concept demonstrating DLL construction for this sideload is available at: https://github.com/karminang/poc/blob/main/x64-sideload-DLL-WINMM.py
karminang
changed the title
Updated commands for setupugc.exe with detailed descriptions and use cases.
Updated command description formatting for clarity.
wietze
approved these changes
Jun 15, 2026
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Hey I removed xpsrchvw as it doesn't meet the requirements for this project (because it involves DLL Hijacking that requires relocation of the binary in question).
setupupc does, despite requiring a registry change - I did restructure the file somewhat and added the required tag.
Thanks for contributing
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Description
setupugc.exe(Setup Unattend Generic Command Processor) can be abused to execute arbitrary commands. By modifying the registry atHKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\UnattendSettings\Setup-Unattend-Settings\RunSynchronous\<N>\Path, an attacker can define a command path. Whensetupugc.exeis executed with a valid Windows setup pass argument (e.g.,specialize), it reads the registry value and launches the specified process viaCreateProcessW.Detection
Monitor for unauthorized modifications to the
UnattendSettingsregistry key or unexpected execution ofsetupugc.exein association with setup operations.