Skip to main content Threats Blogs Antimalware updates Definition change log Windows security Microsoft Defender ATP Microsoft Threat Protection Malicious Software Removal Tool (MSRT) Safety Scanner Microsoft Defender Offline Submit a file View submission history Report unsafe site Attack surface reduction Sources of infection Avoid tech support scams Troubleshoot detection and removal Up-to-date software Developer resources Threat naming Threat identification criteria Security industry alliances Microsoft Security Azure Dynamics 365 Microsoft 365 Microsoft Teams Windows 365 Microsoft AI Azure Space Mixed reality Microsoft HoloLens Microsoft Viva Quantum computing Sustainability Education Automotive Financial services Government Healthcare Manufacturing Retail Find a partner Become a partner Partner Network Microsoft Marketplace Software companies Blog Microsoft Advertising Developer Center Documentation Events Licensing Microsoft Learn Microsoft Research View Sitemap
Published Aug 12, 2015 | Updated Sep 15, 2017

BrowserModifier:Win32/SupTab

Detected by Microsoft Defender Antivirus

Aliases: No associated aliases

Summary

Windows Defender detects and removes this unwanted software.

This browser modifier is a member of the Win32/SupTab family. It installs add-ons or extensions to your Internet browser without your permission. It also and modifies your search settings.

Usually, this threat bypasses the normal prompts or dialogs that ask for your consent to install browser extensions, toolbars, or add-ons into the Internet Explorer and Google Chrome web browsers.

It also modifies browser shortcut files. When launched using these modified shortcuts, the browsers open certain websites that you may not intend to visit.

This threat is part of a suite of malware and unwanted software families that is also called "Fireball". Read about this threat group in the Windows Security blog: 

Understanding the true size of “Fireball”

Find out more about how and why we identify unwanted software.

This program poses a high threat to your PC.

Use the following free Microsoft software to detect and remove this threat:

You should also run a full scan. A full scan might find other, hidden threats.

Use cloud protection

Use cloud protection to help guard against the latest malware threats. It’s turned on by default for Microsoft Security Essentials and Windows Defender for Windows 10. 

Go to All settings > Update & security > Windows Defender and make sure that your Cloud-based Protection settings is turned On.

Get more help

You can also visit our advanced troubleshooting page or search the Microsoft virus and malware community for more help.

If you’re using Windows XP, see our Windows XP end of support page.

Follow us
English (United States)
Your Privacy Choices Opt-Out Icon Your Privacy Choices
Consumer Health Privacy Sitemap Contact Microsoft Privacy Manage cookies Terms of use Trademarks Safety & eco Recycling About our ads