Js, Trojan-downloader:JS, Js.trojan, Js.trojan-downloader


The identifier 'JS' is F-Secure's platform designation for a program written in the JavaScript language.


Automatic action

Based on the settings of your F-Secure security product, it will either move the file to the quarantine where it cannot spread or cause harm, or remove it.

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Technical Details

JavaScript is a popular scripting language (only loosely related to the Java programming language) commonly used on Web pages to add interactivity to its elements.

As with other languages, JavaScript can be used to create software containing malicious routines, such as:

Malicious JavaScript code embedded on a webpage may also be used to download malware onto a user's device. Examples of malware delivered this way include:

A detection with the 'JS' platform identifier may also be used to identify a webpage (HTML or CHM) that contains suspicious JavaScript code. In this case, the malicious script is most commonly an exploit. An example of such suspect code is:

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