Threats Tagged 'chrome extensions'

Six Chrome and Firefox extensions linked through shared code, C2 infrastructure, and publishing history have been identified targeting cryptocurrency traders. Four malicious extensions steal authenticated session tokens and wallet data from Axiom Trade and Padre users, while two earlier extensions reveal a pattern of repackaging crypto trading tools. The extensions J7Tracker, VREO, and Orbit Tracker automatically retrieve user information, wallet bundles, Firebase tokens, and application state, then exfiltrate data to threat actor-controlled Vercel deployments. The campaign targets an active trading community with Axiom processing over $15 billion in volume across 650,000 wallets. The malicious code runs inside authenticated sessions, collecting localStorage, IndexedDB data, and API responses containing authentication tokens and wallet keys. Data is Base64-encoded and transmitted via browser navigation to avoid CORS restrictions, enabling account compromise and cryptocurrency theft.

Socket's Threat Research Team identified a campaign of 737 malicious VPN and proxy extensions in the Chrome Web Store, accumulating over 75,000 installs. The extensions, published across 40 developer accounts, target Russian-speaking users seeking access to blocked services. 274 extensions impersonate 66 established VPN brands including Proton VPN, NordVPN, and AmneziaVPN. The extensions route all browser traffic through SOCKS5 proxies controlled by a single operator on port 1082, placing the threat actor in an adversary-in-the-middle position. Premium subscription tiers advertise servers in five countries that do not resolve. The campaign employs DNS-over-HTTPS for evasion, post-approval code substitution, and coordinated review gaming. The operation is linked to a Russian subscription VPN business that names a tax-registered self-employed individual as the contracting party.

MediumCampaignRussia#brand impersonation#vpn fraud#proxy redirection

SearchJack represents a coordinated campaign comprising 23 deceptive Chrome browser extensions that silently hijack users' default search engines, redirecting queries through monetization middleware before delivering results. These extensions masquerade as various productivity tools, satellite imagery viewers, maps, and news readers while their actual purpose is generating search affiliate revenue. The campaign affects approximately 758,000 users across 22 unique publishers and leverages at least 8 distinct monetization brokers, primarily routing traffic through Yahoo Hosted Search affiliate programs. The extensions employ manifest-only wrappers using chrome_settings_overrides to hijack search settings, with some implementing runtime obfuscation to evade static analysis. Several extensions feature false privacy claims, anomalous review patterns, and anonymous publishers with fictional corporate identities, enabling operators to monetize user search behavior while maintaining zero accountability.

Multiple malicious Chrome extensions are exploiting the growing use of AI platforms by disguising themselves as legitimate productivity tools while secretly stealing user conversations and personal data. Extensions including Urban VPN, Smart Sidebar, and AI Assistant/Chat AI collectively reach millions of users but contain hidden scripts that intercept communications with popular AI platforms like ChatGPT, Claude, DeepSeek, Gemini, and others. These extensions inject malicious JavaScript that overrides network requests, monitors DOM elements for chat interactions, and exfiltrates sensitive data including conversation content, session identifiers, and timestamps to remote servers. The threat is particularly concerning as users frequently share confidential personal, medical, and corporate information with AI platforms, making intercepted conversations highly valuable for threat actors.

A coordinated campaign of 108 malicious Chrome extensions operated through shared command-and-control infrastructure at cloudapi[.]stream has been identified, collectively accounting for approximately 20,000 installations. The campaign spans multiple threat categories: 54 extensions steal Google account identities via OAuth2, one extension actively exfiltrates Telegram Web sessions every 15 seconds, and 45 extensions contain a universal backdoor enabling arbitrary URL execution on browser startup. Published under five distinct publisher identities (Yana Project, GameGen, SideGames, Rodeo Games, and InterAlt), these extensions masquerade as legitimate tools including Telegram sidebar clients, slot games, YouTube and TikTok enhancers, and translation utilities. All extensions route stolen credentials, user identities, and browsing data to servers controlled by the same operator, with infrastructure confirming a Malware-as-a-Service business model.

A coordinated campaign of Chrome extensions posing as AI assistants has been uncovered, affecting over 260,000 users. These extensions, while appearing legitimate, embed remote, server-controlled interfaces inside extension-controlled surfaces, granting access to sensitive browser capabilities. The campaign consists of 30 different extensions sharing the same codebase, permissions, and backend infrastructure. Key features include remote iframe as the core UI, page content extraction, voice recognition capability, and Gmail integration. The extensions communicate with infrastructure under the tapnetic.pro domain, using subdomain segmentation for logical separation. The campaign employs extension spraying tactics to evade takedowns and quickly restore distribution. This approach breaks the browser security model, potentially allowing data harvesting and user behavior monitoring.

MediumCampaignGermanyFranceUnited Kingdom+7#chrome extensions#browser security#extension spraying

A campaign targeting the Google Chrome Web Store has deployed over 100 malicious browser extensions masquerading as legitimate tools like VPNs, AI assistants, and crypto utilities. These extensions, while offering some promised functionality, secretly connect to threat actor infrastructure to steal user information and execute remote scripts. They can modify network traffic, deliver ads, perform redirections, and act as proxies. The campaign, discovered by DomainTools researchers, involves numerous fake domains promoting these tools. The extensions request permissions that enable cookie theft, DOM-based phishing, and dynamic script injection. Risks include account hijacking, data theft, and browsing activity monitoring. Some extensions remain on the Chrome Web Store despite Google's removal efforts.

MediumCampaignGermanyFranceUnited Kingdom+7#browser security#google web store#remote script execution

An unknown threat actor has been creating malicious Chrome browser extensions since February 2024, using fake websites to lure users into installing them. These extensions have dual functionality, appearing to work as intended while also connecting to malicious servers to steal user data and execute arbitrary code. The extensions request excessive permissions and use various techniques to bypass security measures. They communicate with actor-controlled API domains, sending encrypted system information and receiving dynamic rules and code. The malicious activities include cookie theft, traffic manipulation, and potential account compromises. Over 100 fake websites and extensions have been deployed, exploiting current trends to attract users. The Chrome Web Store has removed some extensions, but the actor's persistence poses an ongoing threat to users seeking productivity tools and browser enhancements.

MediumCampaignGermanyFranceUnited Kingdom+7#data theft#traffic manipulation#lure websites