Tag: Mozilla Firefox browser

GhostPoster Malware Found in 17 Firefox Add-ons with 50,000+ Downloads

17Dec

By RBNo Comments

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GhostPoster Malware Found in 17 Firefox Add-ons with 50,000+ Downloads

Using logo files linked to 17 Mozilla Firefox browser add-ons, a new campaign called GhostPoster has embedded malicious JavaScript code intended to steal affiliate links, insert tracking code, and commit click and ad fraud. Koi Security, which found the campaign, claims that the extensions have been downloaded more than 50,000 times in total. The add-ons are no longer accessible. These browser apps were marketed as unofficial Google Translate versions, screenshot tools, VPNs, and ad blockers. Dark Mode, the oldest add-on, was released on October 25, 2024, and it allows all websites to have a dark theme. Below is a complete list of browser add-ons. Free VPN Screenshot Weather (weather-best-forecast) Mouse Gesture (crxMouse) Cache - Fast site loader Free MP3 Downloa...

Over 40 Malicious Firefox Extensions Target Cryptocurrency Wallets, Stealing User Assets

4Jul

By RBNo Comments

News

Over 40 Malicious Firefox Extensions Target Cryptocurrency Wallets, Stealing User Assets

Researchers studying cybersecurity have discovered more than 40 malicious Mozilla Firefox browser extensions that are intended to steal bitcoin wallet secrets and jeopardize users' digital assets. The wallet tools from popular platforms including Coinbase, MetaMask, Trust Wallet, Phantom, Exodus, OKX, Keplr, MyMonero, Bitget, Leap, Ethereum Wallet, and Filfox are impersonated by these extensions. Yuval Ronen, a Koi Security researcher, stated. According to reports, the extensive effort has been going on since at least April 2025, and as recently as last week, fresh extensions were added to the Firefox Add-ons market. By adding hundreds of 5-star ratings that far exceed the total number of active installations, the discovered extensions have been proven to artificially boost their...