Threat actor goes on a Chrome extension hijacking spree [proofpoint]

Chrome Extensions are a powerful means of adding functionality to the Chrome browser with features ranging from easier posting of content on social media to integrated developer tools. At the end of July and beginning of August, several Chrome Extensions were compromised after their author’s  Google Account credentials were stolen via a phishing scheme. This resulted in hijacking of traffic and exposing users to potentially malicious popups and credential theft.

We specifically examined the “Web Developer 0.4.9” extension compromise, but found evidence that “Chrometana 1.1.3”, “Infinity New Tab 3.12.3” [8][10] , “CopyFish 2.8.5” [9], “Web Paint 1.2.1” [11], and “Social Fixer 20.1.1” [12]  were modified using the same modus operandi by the same actor. We believe that the Chrome Extensions TouchVPN and Betternet VPN were also compromised in the same way at the end of June.

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