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What’s RegAsm.exe (Microsoft .NET Assembly Registration Utility)? Is it safe or a virus?

RegAsm.exe, or the Microsoft .NET Assembly Registration Utility, is a tool provided by Microsoft to register .NET assemblies for use with COM (Component Object Model) applications. It reads metadata within a .NET assembly and creates the necessary registry entries for making the assembly accessible to native COM clients, bridging the gap between .NET and legacy COM technologies. By generating and registering a type library for the assembly, RegAsm.exe allows COM-based applications to interact with .NET classes/methods as if they were native COM components. It can also unregister assemblies from the registry when they are no longer needed.

Researched by Laura @ SpyShelter Labs

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More about RegAsm.exe on WINDOWS

Who makes RegAsm.exe (Microsoft .NET Assembly Registration Utility)?

We’ve found Microsoft Corporation should be the publisher of RegAsm.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.

Last updated: March 10, 2025

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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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