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What’s that .exe?

Is that executable safe, or a threat?

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Executable Directory

Our ultimate directory of Windows PC executables.

What’s SysToolsMBOXViewer.exe (SysTools MBOX Viewer v4.0)? Is it safe or a virus?

SysToolsMBOXViewer.exe, developed by SysTools Inc, is a software application designed to open and view MBOX files without requiring an email client. MBOX files are commonly used to store email messages, and this tool allows users to access their content, including emails and attachments, directly. It is particularly useful for individuals who need to analyze or preview MBOX files for investigation, recovery, or migration purposes. SysTools MBOX Viewer v4.0 provides a user-friendly interface, ensuring an efficient way to manage MBOX data. Additionally, it supports large MBOX files and offers advanced features like searching and sorting emails for better organization.

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

  1. Scan the executable with Microsoft's built-in tech
  2. Find SysToolsMBOXViewer.exe's publisher
  3. Search the executable's hash with VirusTotal
  4. Monitor the executable's behavior

Researched by Carl @ SpyShelter Labs

Recently Detected Threats

A Trojan is a harmful software that pretends to be a legitimate program or file to deceive users into downloading it. It can steal personal information, damage files, or give hackers control over the infected device.

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Recently Viewed Executables

More about SysToolsMBOXViewer.exe on WINDOWS

Who makes SysToolsMBOXViewer.exe (SysTools MBOX Viewer v4.0)?

We’ve found SysTools Inc should be the publisher of SysToolsMBOXViewer.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 19, 2025

Curious about other processes on your PC?
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Or browse the process directory by name:

ABCDEFGHIJKLMNOPQRSTUVWXYZ#

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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