Attackers are abusing a critical Ghost Content Management System (CMS) vulnerability to hijack more than 700 legitimate websites and inject a fake Cloudflare verification step that tricks visitors into running a Windows command that installs malware. These social engineering campaigns—where website visitors are tricked into running malicious commands on their systems—are commonly known as “ClickFix” […]

During our threat hunting activities, we found fake installers and plugins impersonating popular software including ChatGPT, Claude, AutoTune, and Kontakt on GitHub and SourceForge distributing a Deno backdoor known as DinDoor. Attackers are using compromised YouTube channels to distribute links to these platforms.  DinDoor ultimately drops different types of malware, including a stealthy remote access […]

Last week on Malwarebytes Labs: Update Chrome now: Critical bugs could let attackers run code Microsoft Defender vulnerabilities are being exploited in the wild TikTok, YouTube, and Roblox face scrutiny, but age gates won’t fix child safety Catch spyware in the act with Windows Webcam Monitoring Researchers left AI agents alone in a virtual town […]

In 2025, we observed pervasive SSH tunnel activity, which has remained active into 2026, affecting many government organizations and commercial companies in Russia and Belarus. Behind some of this activity is Cloud Atlas, a group we have known since 2014. During our investigation, we identified new tools used by this group, as well as indicators […]

Google has issued updates for the Chrome browser patching a number of high‑severity vulnerabilities.  The update includes fixes for two critical vulnerabilities that can be used for remote code execution just by visiting a malicious website. The stable channel has been updated to 148.0.7778.178/179 for Windows/Mac and 148.0.7778.178 for Linux, which will roll out over […]

A damaging new report from Ofcom, the UK’s communications regulator, has delivered a stark verdict: TikTok and YouTube’s content feeds are “not safe enough” for children. This isn’t just another regulatory slap on the wrist. Ofcom is putting out a wake-up call for anyone working in cybersecurity, threat intelligence, and online safety. In its own words: […]

Two Microsoft Defender vulnerabilities are being actively exploited in the wild. On May 20, 2026, the Cybersecurity and Infrastructure Security Agency (CISA) added a notable set of actively exploited vulnerabilities to its Known Exploited Vulnerabilities (KEV) catalog. The KEV catalog tracks vulnerabilities known to be exploited in the wild and sets patch deadlines for Federal […]

Tech leaders have spent the past year telling everyone that AI agents are about to run financial systems, file your tax returns, and quietly buy your groceries. Just leave them alone, the rhetoric goes; they’ll handle it. But a New York startup left ten of them alone in a virtual town for two weeks, and […]

You’re working hard late at night, replying to emails and planning the week ahead. Then suddenly, a PDF file requests access to your camera.  Why would a PDF need camera access?  Cybercriminals often disguise spyware inside seemingly harmless files and programs. An unexpected request for access to your webcam can be a red flag that something is amiss.  Malwarebytes Windows Webcam Monitoring […]

Mozilla has published release notes for Firefox browser version 151.0, and this update includes several genuinely meaningful privacy and security improvements. Three changes stand out in particular: Stronger anti‑fingerprinting Broader protection for local network access More control over private sessions and permissions Note that Mozilla says several Firefox 151 features are “part of a progressive […]