Extensions
Fake AI Chrome extensions with 300K users steal credentials, emails
A set of 30 malicious Chrome extensions that have been installed by more than 300,000 users are masquerading as AI assistants to steal credentials, email content, and browsing information. Some of the extensions are still present in the Chrome Web Store and have been installed by tens of thousands of users, while others show a […]
New GlassWorm attack targets macOS via compromised OpenVSX extensions
A new GlassWorm malware attack through compromised OpenVSX extensions focuses on stealing passwords, crypto-wallet data, and developer credentials and configurations from macOS systems. The threat actor gained access to the account of a legitimate developer (oorzc) and pushed malicious updates with the GlassWorm payload to four extensions that had been downloaded 22,000 times. GlassWorm attacks first appeared […]
Malicious AI extensions on VSCode Marketplace steal developer data
Two malicious extensions in Microsoft’s Visual Studio Code (VSCode) Marketplace that were collectively installed 1.5 million times exfiltrate developer data to China-based servers. Both extensions are advertised as AI-based coding assistants that provide the promised functionality. However, they do not disclose the upload activity or ask users for consent to deliver data to a remote server. The VS Code Marketplace is […]
Malicious GhostPoster browser extensions found with 840,000 installs
Another set of 17 malicious extensions linked to the GhostPoster campaign has been discovered in Chrome, Firefox, and Edge stores, where they accumulated a total of 840,000 installations. The GhostPoster campaign was first reported by Koi Security researchers in December. They found 17 extensions that were hiding malicious JavaScript code in their logo images, which monitored browser activity and planted […]
VSCode IDE forks expose users to “recommended extension” attacks
Popular AI-powered integrated development environment solutions, such as Cursor, Windsurf, Google Antigravity, and Trae, recommend extensions that are non-existent in the OpenVSX registry, allowing threat actors to claim the namespace and upload malicious extensions. These AI-assisted IDEs are forked from Microsoft VSCode, but cannot use the extensions in the official store due to licensing restrictions. […]
New GlassWorm malware wave targets Macs with trojanized crypto wallets
A fourth wave of the “GlassWorm” campaign is targeting macOS developers with malicious VSCode/OpenVSX extensions that deliver trojanized versions of crypto wallet applications. Extensions in the OpenVSX registry and the Microsoft Visual Studio Marketplace expand the capabilities of a VS Code-compatible editor by adding features and productivity enhancements in the form of development tools, language support, or themes. […]
Zoom Stealer browser extensions harvest corporate meeting intelligence
A newly discovered campaign, which researchers call Zoom Stealer, is affecting 2.2 million Chrome, Firefox, and Microsoft Edge users through 18 extensions that collect online meeting-related data like URLs, IDs, topics, descriptions, and embedded passwords. Zoom Stealer is one of three browser extension campaigns that reached more than 7.8 million users over seven years and […]
Trust Wallet says 2,596 wallets drained in $7 million crypto theft attack
Trust Wallet says attackers who compromised its browser extension right before Christmas have drained approximately $7 million from nearly 3,000 cryptocurrency wallet addresses. The cryptocurrency wallet (used by over 200 million people according to its official website) allows users to store, send, receive, and manage Bitcoin, Ethereum, Solana, and thousands of other cryptocurrencies and digital […]
GhostPoster attacks hide malicious JavaScript in Firefox addon logos
A new campaign dubbed ‘GhostPoster’ is hiding JavaScript code in the image logo of malicious Firefox extensions with more than 50,000 downloads, to monitor browser activity and plant a backdoor. The malicious code grants operators persistent high-privilege access to the browser, enabling them to hijack affiliate links, inject tracking code, and commit click and ad fraud. […]
Malicious VSCode Marketplace extensions hid trojan in fake PNG file
A stealthy campaign with 19 extensions on the VSCode Marketplace has been active since February, targeting developers with malware hidden inside dependency folders. The malicious activity was uncovered recently, and security researchers found that the operator used a malicious file posing as a .PNG image. The VSCode Market is Microsoft’s official extensions portal for the widely used […]