Fake Chrome extensions inject code into web pages

Recently, here at our research lab, we have seen an increase in the number of JS/Chromex.Submelius threats detected. In countries like Colombia, Peru, Ecuador and Chile, the detection levels for this particular threat have been as high as 30% or 40% of the total threats for the entire country.

This is a trojan that redirects the user’s browser to a specific URL, which contains another kind of malicious content. Given the high detection levels for this threat, which primarily targets Chrome, currently one of the most popular web browsers, we set out to find out how the threat is being propagated and how a user might fall into its trap.

Fake Chrome extensions inject code into web pages