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What’s subst.exe (Subst Utility)? Is it safe or a virus?

subst.exe is a command-line tool included in Microsoft Windows that allows users to create virtual drives by associating a drive letter with a specific folder on a local or network drive.

This can be useful for maintaining a simpler and more organized file structure, as well as for providing easy access to frequently used folders. By using subst.exe, users can create a virtual drive letter for a specific folder and then access it as if it were a separate drive. This can be especially helpful for shortening lengthy file paths and simplifying access to specific files or directories.

(Researched by Carl @ SpyShelter Labs)

Executable Processes List

More about subst.exe on WINDOWS

Who makes subst.exe (Subst Utility)?

We’ve found Microsoft Windows should be the publisher of subst.exe.

How do we know? Our SpyShelter cybersecurity labs focuses on monitoring different types of Windows PC executables and their behaviors for our popular SpyShelter Antispyware software. Learn more about us, and how our cybersecurity team studies Windows PC executables/processes.

What does it mean if someone is the publisher of a PC .exe (executable or process)?

The publisher of an executable is the entity responsible for its distribution and authenticity. Most processes/executables on your PC should be signed. The signature on the executable should have been verified through a third party whose job it is to make sure the entity is who it says it is. Find an unsigned executable? You should consider scanning any completely unsigned .exe on your PC.

Is subst.exe safe or a virus?

Below are 4 simple steps you can take to see if the subst.exe process is safe or malware.

  1. Scan the executable with Microsoft's built-in tech
  2. Find subst.exe's publisher
  3. Search the executable's hash with VirusTotal
  4. Monitor the executable's behavior
Last updated: February 7, 2024

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Why should you trust us?

Our team at SpyShelter has been studying Windows PC executables for over 15 years, to help fight against spyware, malware, and other threats. SpyShelter has been featured in publications like The Register, PC Magazine, and many others. Now we’re working to share free, actionable, and easy to understand information about Windows executables (processes) with the world, to help as many people as possible keep their devices safe. Learn more about us on our "About SpyShelter” page.

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