Malicious Browser Extensions Mimic Trusted Add-ons to Steal Credentials
Cybersecurity experts have unveiled a sophisticated cyber threat that enables a malicious Browser Extensions to perfectly mimic legitimate add-ons, deceiving users into providing sensitive credentials. According to a recent report by security firm SquareX, the technique involves creating a replica of a targeted extension, including its icon, HTML pop-ups, and workflows. This deception is further reinforced by temporarily disabling the legitimate extension, making it nearly impossible for users to differentiate between the original and the fake. Once victims input their credentials into the fraudulent extension, attackers can exploit this information to gain unauthorized access to personal and financial accounts. The attack impacts all Chromium-based browsers, including Google Chrome, Microsoft Edge, Brave, and Opera.
Exploiting User Behavior to Deliver the Attack
The success of this attack largely depends on users’ tendency to pin extensions to their browser toolbars. Cybercriminals distribute these polymorphic extensions through online marketplaces, such as the Chrome Web Store, disguising them as seemingly useful tools. While these extensions may initially function as advertised, they secretly scan the browser for specific web resources associated with targeted extensions using a technique called web resource hitting. Once a match is found, the rogue extension morphs into a replica of the legitimate add-on by changing its icon and using the “chrome. management” API to disable the real extension. As a result, the genuine extension disappears from the toolbar, and users unknowingly interact with the fraudulent version, putting their sensitive data at risk.
Growing Cybersecurity Concerns and Prevention Measures
This revelation comes shortly after SquareX exposed another browser-based attack known as Browser Syncjacking, which allows cybercriminals to take control of a victim’s device through an innocuous-looking extension. These emerging threats highlight the increasing sophistication of cyberattacks targeting browser extensions, a commonly overlooked vulnerability. Experts advise users to remain cautious when installing extensions, verify the source and permissions of each add-on, and monitor any unexpected behavior in their browsers. Additionally, cybersecurity professionals recommend keeping software updated and enabling multi-factor authentication to add an extra layer of protection against potential threats. As cybercriminals continue to refine their tactics, awareness and proactive measures remain critical in mitigating these risks.
