MediumActive
Medium Risk
50%
Browser Hijacker Adware
Redirects searches, injects ads, and changes homepage without consent.
#adware#browser#pup
Threat Overview
Browser hijackers alter default search engines, inject affiliate ads, and redirect traffic—often bundled with free software installers.
Attack Behavior
- Search engine replacement
- Injected banner ads on legitimate sites
- Affiliate link redirection
Infection Methods
- Bundled installers
- Malicious extensions
- Policy key modification on Windows
Symptoms & Indicators
- Homepage changes after restart
- New toolbars
- Search results filled with ads
Immediate Mitigation
- Reset browser settings
- Remove suspicious extensions
- Check enterprise policy keys
Removal Guidance
- Run PUP cleanup scan
- Reset browser profiles
- Clear DNS cache
Prevention Methods
- Custom install options declining bundles
- Web protection blocking malicious extensions
Telemetry Indicators
- Chrome extension policy overrides
- Modified OpenWithProgids entries
It is often a gateway to more serious spyware or downloaders. Remove promptly and scan fully.