Trojan.JS.Likejack is JavaScript malware that silently trickes the user into clicking a 'Like' button for a Facebook page without their knowledge or authorization.

Automatic action

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A False Positive is when a file is incorrectly detected as harmful, usually because its code or behavior resembles known harmful programs. A False Positive will usually be fixed in a subsequent database update without any action needed on your part. If you wish, you may also:

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  • Submit a sample

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    NOTE If the file was moved to quarantine, you need to collect the file from quarantine before you can submit it.

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    Note You need administrative rights to change the settings.

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Technical Details

Trojan.JS.Likejack is essentially a form of 'clickjacking', in which an attacker uses HTML or coding trickery to disguise a 'Like' button or tag and place it on a page in such a way that the user is lured into unintentionally clicking it. For example, this can be done by placing a transparent button over a link and asking the user to click the link, thus inadvertently also clicking the button. By doing so, the attacker can fraudulently gain 'Likes'; with enough 'Likes', the attacker can then distribute other fake or malicious content.

Trojan.JS.Likejack is often distributed in fake or compromised webpages and in malicious videos spread on forums or social media.

In late November 2014, this malware was reportedly found being used in videos posted on Facebook that were related to a premium car giveaway scam.