CleanBlocker

Threat Scorecard

Ranking: 1,103
Threat Level: 20 % (Normal)
Infected Computers: 3,407
First Seen: November 17, 2022
Last Seen: September 25, 2023
OS(es) Affected: Windows

The CleanBlocker browser extension is presented to users as a convenient way to reduce the advertisements they encounter while browsing the Internet, as well as stop websites from tracking their activities. However, when analyzed by infosec researchers, CleanBlocker revealed the opposite functionality. Once installed by users, the application is designed to generate and deliver unwanted and intrusive advertisements, which classifies it as adware. In addition, one of the distribution channels for the application is via deceptive and untrustworthy websites, making it a PUP (Potentially Unwanted Program), as well.

Adware applications can have a considerable impact on the devices they are active on. The frequently generated advertisements could impact the user experience negatively by interrupting the normal activities carried out on the system. More importantly, advertisements delivered by unproven sources are commonly observed to promote untrustworthy destinations - fake giveaways, phishing tactics, technical support frauds, shady adult sites, platforms spreading more PUPs, etc.

Users also risk having their data monitored, packaged, and transmitted to the operators of the specific PUP. Information, such as their browsing history, search history, clicked URLs, IP addresses, geolocation, and sometimes even account credentials or banking details, could be exfiltrated continuously.

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