NSA and Global Allies Declare Fast Flux a National Security Threat

NSA and global cybersecurity agencies warn fast flux DNS tactic is a growing national security threat used in phishing, botnets, and ransomware...

One mighty fine-looking report

Welcome to this week's edition of the Threat Source newsletter. They say art is subjective, but have you ever seen a well-formatted bar chart? Van Gogh had Starry Night , but Talos' 2024 Year in Review available now! has color-coded data with perfect labels. True beauty. If you haven't yet had a...

A Rebirth of a Cursed Existence? Examining ‘Babuk Locker 2.0’ Ransomware

Co-authored by Yaniv Allender and Anna Sirokova Introduction Ransomware remains a major threat, causing significant disruption and financial losses to organizations across various sectors. Cybercriminal groups behind these attacks constantly adapt their methods to maximize damage and profit. At...

A Rebirth of a Cursed Existence? Examining ‘Babuk Locker 2.0’ Ransomware

Co-authored by Yaniv Allender and Anna Sirokova Introduction Ransomware remains a major threat, causing significant disruption and financial losses to organizations across various sectors. Cybercriminal groups behind these attacks constantly adapt their methods to maximize damage and profit. At...

Beers with Talos: Year in Review episode

Joe, Hazel, Bill and Dave break down Talos' Year in Review 2024 and discuss how and why cybercriminals have been leaning so heavily on attacks that are routed in stealth in simplicity. The team also provide insights into some of the topics of the report, including the top-targeted vulnerabilities...

Available now: 2024 Year in Review

Welcome to Cisco Talos' 2024 Year in Review, available for download now. This report is powered by threat telemetry from over 46 million global devices across 193 countries and regions, amounting to more than 886 billion security events per day. Explore key insights in topics including the top...

A week in security (March 24 – March 30)

Last week on Malwarebytes Labs: Vulnerability in most browsers abused in targeted attacks "This fraud destroyed my life." Man ends up with criminal record after ID was stolen Moving from WhatsApp to Signal: A good idea? Security expert Troy Hunt hit by phishing attack Booking.com phish uses fake...

SquareX Discloses Browser-Native Ransomware that Puts Millions at Risk

Palo Alto, USA, 29th March 2025, CyberNewsWire...

BlackLock Ransomware Exposed After Researchers Exploit Leak Site Vulnerability

In what's an instance of hacking the hackers, threat hunters have managed to infiltrate the online infrastructure associated with a ransomware group called BlackLock, uncovering crucial information about their modus operandi in the process. Resecurity said it identified a security vulnerability i...

RedCurl Uses New QWCrypt Ransomware in Hypervisor Attacks

Discover the novel QWCrypt ransomware used by RedCurl in targeted hypervisor attacks. This article details their tactics, including…...

Hackers Repurpose RansomHub's EDRKillShifter in Medusa, BianLian, and Play Attacks

A new analysis has uncovered connections between affiliates of RansomHub and other ransomware groups like Medusa, BianLian, and Play. The connection stems from the use of a custom tool that's designed to disable endpoint detection and response EDR software on compromised hosts, according to ESET...

Exposed Dangerous Method Or Function

H2O-3 is vulnerable to Exposed Dangerous Method or Function. The vulnerability is due to improper access control due to an exposed EncryptionTool endpoint that allows an attacker to encrypt files on the target server with a chosen key, potentially leading to ransomware-like behavior by overwritin...

RedCurl Shifts from Espionage to Ransomware with First-Ever QWCrypt Deployment

The Russian-speaking hacking group called RedCurl has been linked to a ransomware campaign for the first time, marking a departure in the threat actor's tradecraft. The activity, observed by Romanian cybersecurity company Bitdefender, involves the deployment of a never-before-seen ransomware stra...

Medusa Ransomware Disables Anti-Malware Tools with Stolen Certificates

Cybercriminals exploit AbyssWorker driver to disable EDR systems, deploying MEDUSA ransomware with revoked certificates for stealthy attacks...

VanHelsing RaaS Launch: 3 Victims, $5K Entry Fee, Multi-OS, and Double Extortion Tactics

A ransomware-as-a-service RaaS operation called VanHelsing has already claimed three victims since it launched on March 7, 2025, demanding ransoms as high as $500,000. "The RaaS model allows a wide range of participants, from experienced hackers to newcomers, to get involved with a $5,000 deposit...

⚡ THN Weekly Recap: GitHub Supply Chain Attack, AI Malware, BYOVD Tactics, and More

A quiet tweak in a popular open-source tool opened the door to a supply chain breach—what started as a targeted attack quickly spiraled, exposing secrets across countless projects. That wasn't the only stealth move. A new all-in-one malware is silently stealing passwords, crypto, and control—whil...

Cloak Ransomware Hits Virginia Attorney General’s Office, Disrupts IT Systems

Cloak ransomware group claims attack on Virginia attorney general's office, demands ransom for stolen data. Investigation underway. Find out the impact and what's being done...

VSCode Marketplace Removes Two Extensions Deploying Early-Stage Ransomware

Cybersecurity researchers have uncovered two malicious extensions in the Visual Studio Code VSCode Marketplace that are designed to deploy ransomware that's under development to its users. The extensions, named "ahban.shiba" and "ahban.cychelloworld," have since been taken down by the marketplace...

A week in security (March 17 – March 23)

Last week on Malwarebytes Labs: What Google Chrome knows about you, with Carey Parker Lock and Code S06E06 Personal data revealed in released JFK files Semrush impersonation scam hits Google Ads Targeted spyware and why it’s a concern to us The "free money" trap: How scammers exploit financial...

Jasmin Ransomware Arbitrary File Download

Jasmin Ransomware suffers from an arbitrary file download vulnerability. Exploit Title: Jasmin Ransomware - Authenticated Arbitrary File Download Google Dork: N/A Date: 22-03-2025 Exploit Author: bRpsd cyatlive.no Vendor Homepage: https://github.com/codesiddhant/Jasmin-Ransomware Software Link:...