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What’s signtool.exe (Authenticode(R) - signing and verifying tool)? Is it safe or a virus?

Signtool.exe is a command-line tool provided by Microsoft Corporation that is used to digitally sign files, such as executable files and installer packages, with a code-signing certificate.

This tool helps ensure the integrity and authenticity of the files by attaching a digital signature to them, which allows users to verify that the files have not been tampered with and were indeed produced by the entity claiming to have created them.

(Researched by Carl @ SpyShelter Labs)

Executable Processes List

More about signtool.exe on WINDOWS

Who makes signtool.exe (Authenticode(R) - signing and verifying tool)?

We’ve found Microsoft Corporation should be the publisher of signtool.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 signtool.exe safe or a virus?

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

  1. Scan the executable with Microsoft's built-in tech
  2. Find signtool.exe's publisher
  3. Search the executable's hash with VirusTotal
  4. Monitor the executable's behavior
Last updated: February 9, 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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