DefenderBadUrl

Threat Scorecard

Ranking: 7,426
Threat Level: 50 % (Medium)
Infected Computers: 929
First Seen: January 25, 2019
Last Seen: September 25, 2023
OS(es) Affected: Windows

DefenderBadUrl is another seemingly useful browser extension that turns out to be something else. According to its description, it can save users from visiting or accessing evil-minded, threatening or untrustworthy websites. However, after installation, it quickly reveals the true nature of an adware application. Users will experience increased amounts of advertisements encountered while browsing, resulting in a significantly diminished browsing experience.

Typically, the advertisements delivered by adware applications cannot be trusted. They are likely to employ clickbait or other social-engineering tactics designed to entice users into interacting with them. Afterward, the advertisements could lead to questionable or even compromised websites. Users also may be presented with offers to install additional software products that could have intrusive browser hijacker or adware functionalities.

In addition, DefenderBadUrl could be spying on the user's browsing activities. Through its data-collection routines, the application may access the browsing history, search history, numerous device details (IP address, geolocation, ISP, etc.) and more. More unsafe adware, browser hijackers, and other PUPs (Potentially Unwanted Programs) could even try to obtain sensitive payment or banking information, which could lead to sizeable monetary losses.

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