Background.js

Background.js is a common file name found as part of numerous Chrome browser extensions and other applications. The exact functionality could vary. depending on the specific application, but in general .js files contain JavaScript code that is going to be executed on Web pages. As for background.js name, it usually designates a script that will react to certain browser events and perform the actions established in its code in the background.

Naturally, in the vast majority of cases where users run into this particular file, it will be part of a perfectly legitimate application. However, this may not always be the case. As a generic name, malware developers also could include it as part of their threatening creations or try to hide the abnormal files under the guise of normal and less suspicious ones. In these cases, users should scan the background.js file they have on their system with a professional security solution. They also should pay attention to any other suspicious activities happening on their systems.

Chances are that the fraudulent background.js will be related to an intrusive extension with adware or browser hijacker functionalities. Adware applications are designed to deliver obnoxious and intrusive advertisements to users' devices, while browser hijackers take over the installed browsers and modify several, important settings as a way to promote a sponsored Web address. More importantly, adware, browser hijackers, and PUPs (Potentially Unwanted Programs) in general, are notorious for having data-tracking capabilities. While present on the device, these invasive applications may monitor users' browsing activities, collect device details, or try to extract other sensitive data. The obtained information is likely to be packaged and then transmitted to the operators of the specific PUP.