GhostPoster Browser Malware Hid for 5 Years With 840,000 Installs

Researchers uncover a 5-year malware campaign using browser extensions on Chrome, Firefox and Edge, relying on hidden payloads and shared infrastructure...

DarkSpectre Browser Extension Campaigns Exposed After Impacting 8.8 Million Users Worldwide

The threat actor behind two malicious browser extension campaigns, ShadyPanda and GhostPoster, has been attributed to a third attack campaign codenamed DarkSpectre that has impacted 2.2 million users of Google Chrome, Microsoft Edge, and Mozilla Firefox. The activity is assessed to be the work of...

ShadyPanda: The Silent Browser Takeover Threat and How Qualys TruRisk Eliminate Helps You Stop It

Executive Summary ShadyPanda has exploited trusted browser extensions to compromise millions of users, illustrating how legitimate software can unexpectedly become harmful. Qualys TruRisk Eliminate empowers organizations to identify risky behaviors, prioritize real threats, and eliminate maliciou...

ShadyPanda Turns Popular Browser Extensions with 4.3 Million Installs Into Spyware

A threat actor known as ShadyPanda has been linked to a seven-year-long browser extension campaign that has amassed over 4.3 million installations over time. Five of these extensions started off as legitimate programs before malicious changes were introduced in mid-2024, according to a report fro...

EUVD-2022-15865

Malicious code in bioql PyPI...

Fake Madgicx Plus and SocialMetrics Extensions Are Hijacking Meta Business Accounts

Cybersecurity researchers have disclosed two new campaigns that are serving fake browser extensions using malicious ads and fake websites to steal sensitive data. The malvertising campaign, per Bitdefender, is designed to push fake "Meta Verified" browser extensions named SocialMetrics Pro that...

The Ultimate Battle: Enterprise Browsers vs. Secure Browser Extensions

Most security tools can’t see what happens inside the browser, but that’s where the majority of work, and risk, now lives. Security leaders deciding how to close that gap often face a choice: deploy a dedicated Enterprise Browser or add an enterprise-grade control layer to the browsers employees...

The Ultimate Battle: Enterprise Browsers vs. Secure Browser Extensions

Most security tools can't see what happens inside the browser, but that's where the majority of work, and risk, now lives. Security leaders deciding how to close that gap often face a choice: deploy a dedicated Enterprise Browser or add an enterprise-grade control layer to the browsers employees...

Browser Extensions Can Exploit ChatGPT, Gemini in ‘Man in the Prompt’ Attack

Man in the Prompt attack shows how browser extensions can exploit ChatGPT, Gemini and other AI tools to steal data or inject hidden prompts...

A week in security (July 7 – July 13)

Last week on Malwarebytes Labs: Deepfake criminals impersonate Marco Rubio to uncover government secrets McDonald’s AI bot spills data on job applicants Millions of people spied on by malicious browser extensions in Chrome and Edge No thanks: Google lets its Gemini AI access your apps, including...

Millions of people spied on by malicious browser extensions in Chrome and Edge

Researchers have discovered a campaign that tracked users’ online behavior using 18 browser extensions available in the official Chrome and Edge webstores. The total number of installs is estimated to be over two million. These extensions offered functionality, received good reviews, touted...

Sleeper Sound: LayerX Uncovers Malicious “Sleeper” Sound Management Extensions with Nearly 1.5 Million Users Worldwide

LayerX has unearthed network of malicious “sleeper agent” extensions that appear to serve as infrastructure for future malicious activity, currently installed on nearly 1.5 million users worldwide. LayerX has discovered a network of browser extensions that appear to serve as ‘sleeper agents’ for...

CVE-2022-28795

A vulnerability within the Avira Password Manager Browser Extensions provided a potential loophole where, if a user visited a page crafted by an attacker, the discovered vulnerability could trigger the Password Manager Extension to fill in the password field automatically. An attacker could then...

Majority of Browser Extensions Can Access Sensitive Enterprise Data, New Report Finds

Everybody knows browser extensions are embedded into nearly every user's daily workflow, from spell checkers to GenAI tools. What most IT and security people don't know is that browser extensions' excessive permissions are a growing risk to organizations. LayerX today announced the release of the...

Researchers Expose New Polymorphic Attack That Clones Browser Extensions to Steal Credentials

Cybersecurity researchers have demonstrated a novel technique that allows a malicious web browser extension to impersonate any installed add-on. "The polymorphic extensions create a pixel perfect replica of the target's icon, HTML popup, workflows and even temporarily disables the legitimate...

Google Chrome Security Bypass Vulnerability (CNVD-2025-06042)

Google Chrome is a web browser from Google, an American company. Google Chrome suffers from a security bypass vulnerability that is caused due to insufficient data validation in extensions. An attacker can exploit this vulnerability to bypass security restrictions...

When Good Extensions Go Bad: Takeaways from the Campaign Targeting Browser Extensions

News has been making headlines over the weekend of the extensive attack campaign targeting browser extensions and injecting them with malicious code to steal user credentials. Currently, over 25 extensions, with an install base of over two million users, have been found to be compromised, and...

Free AI editor lures in victims, installs information stealer instead on Windows and Mac

A large social media campaign was launched to promote a free Artificial Intelligence AI video editor. If the "free" part of that campaign sounds too good to be true, then that's because it was. Instead of the video editor, users got information stealing malware. Lumma Stealer was installed on...

Enterprise Identity Threat Report 2024: Unveiling Hidden Threats to Corporate Identities

In the modern, browser-centric workplace, the corporate identity acts as the frontline defense for organizations. Often referred to as "the new perimeter", the identity stands between safe data management and potential breaches. However, a new report reveals how enterprises are often unaware of h...

New Banshee Stealer Targets 100+ Browser Extensions on Apple macOS Systems

Cybersecurity researchers have uncovered new stealer malware that's designed to specifically target Apple macOS systems. Dubbed Banshee Stealer, it's offered for sale in the cybercrime underground for a steep price of $3,000 a month and works across both x8664 and ARM64 architectures. "Banshee...