Threat Scorecard

Ranking: 935
Threat Level: 10 % (Normal)
Infected Computers: 3,358
First Seen: April 12, 2013
Last Seen: September 25, 2023
OS(es) Affected: Windows

Startfenster likely falls into the category of applications characterized by having browser hijacker capabilities. These applications are designed with the express purpose of taking over users' Web browser. To be more precise, the intrusive applications often target the homepage, new tab page, and default search engine settings and change them to now open a promoted Web address. In the case of Startfenster, affected users may notice frequent redirects to the unfamiliar page or a similar one.

In the vast majority of cases, browser hijackers also are classified as PUPs (Potentially Unwanted Programs) due to the questionable methods involved in their distribution. After all, the operators of these applications realize that users are extremely unlikely to install them intentionally. That is why PUPs are often included as part of software bundles or even spread via entirely fake installers/updates.

Once such an application has been fully deployed on the user's computer or device, it also may activate additional intrusive functionalities. For example, PUPs are infamous for spying on users' browser activities. The applications may collect browsing and search histories, clicked URLs, IP addresses, geolocation and more. All of the harvested data is likely to be exfiltrated to a remote server under the control of the PUP's operators.


Startfenster may call the following URLs:

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