FBI Warns of Silent Ransom Group Targeting Law Firms via Scam Calls

FBI warns law firms: Silent Ransom Group uses phishing emails and fake IT calls to steal data, demanding ransom to prevent public leaks. The agency is also urges victims to share ransom evidence...

CVE-2023-31221

Auth. admin+ Stored Cross-Site Scripting XSS vulnerability in Ransom Christofferson PDQ CSV plugin = 1.0.0 versions...

CVE-2023-42449

Hydra is the two-layer scalability solution for Cardano. Prior to version 0.13.0, it is possible for a malicious head initializer to extract one or more PTs for the head they are initializing due to incorrect data validation logic in the head token minting policy which then results in an flawed...

CVE-2019-14686

A DLL hijacking vulnerability exists in the Trend Micro Security's 2019 consumer family of products v15 Folder Shield component and the standalone Trend Micro Ransom Buster 1.0 tool in which, if exploited, would allow an attacker to load a malicious DLL, leading to elevated privileges...

LockBit Leak Shows Affiliates Use Pressure Tactics, Rarely Get Paid

Weeks after LockBit ransomware breach, leaked data reveals how affiliates generate ransomware, set ransom demands, and often walk away unpaid...

LLMs Unlock New Paths to Monetizing Exploits

We argue that Large language models LLMs will soon alter the economics of cyberattacks. Instead of attacking the most commonly used software and monetizing exploits by targeting the lowest common denominator among victims, LLMs enable adversaries to launch tailored attacks on a user-by-user basis...

Xoxo to Prague

Welcome to this week's edition of the Threat Source newsletter. I haven't been to Prague in a while, which is a pity. It's a wonderful city -- great people, amazing food. I've visited customers there, held team meetings at the local office shoutout to Petr! and spent some memorable summer days of...

Medusa Ransomware Claims NASCAR Breach in Latest Attack

Medusa ransomware hits NASCAR, demands $4M ransom, leaks internal files. Group also claims Bridgebank, McFarland, and Pulse Urgent Care...

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...

Fake BianLian Ransomware Letters in Circulation

At a glance: The FBI is warning of a mail-based fraud involving letters sent to businesses in the U.S. These letters resemble online ransomware notes demanding payment via Bitcoin. Rapid7 examined a mail-based ransom demand sent to a customer from a local postcode. There is no evidence that any o...

Scammers Pose as Cl0p Ransomware to Send Fake Extortion Letters

Scammers are sending fake extortion and ransom demands while posing as ransomware gangs, including the notorious Cl0p ransomware.…...

Ransomware threat mailed in letters to business owners

Business owners and CEOs across the United States received customized ransomware threats this month from the most unusual of places—letters in the mail. The letters, which were first reported by multiple cybersecurity researchers, claim to come from a ransomware group called BianLian. But since...

Medusa Ransomware Hits 40+ Victims in 2025, Demands $100K–$15M Ransom

The threat actors behind the Medusa ransomware have claimed nearly 400 victims since it first emerged in January 2023, with the financially motivated attacks witnessing a 42% increase between 2023 and 2024. In the first two months of 2025 alone, the group has claimed over 40 attacks, according to...

Scammers Mailing Ransom Letters While Posing as BianLian Ransomware

Scammers are impersonating BianLian ransomware, and mailing fake ransom letters to businesses. Learn the red flags and how…...

Leaked Black Basta Ransomware Chat Logs Reveal Inner Workings and Internal Conflicts

More than a year's worth of internal chat logs from a ransomware gang known as Black Basta have been published online in a leak that provides unprecedented visibility into their tactics and internal conflicts among its members. The Russian-language chats on the Matrix messaging platform between...

A week in security (February 3 – February 9)

Last week on Malwarebytes Labs: WhatsApp says Paragon is spying on specific users New AI "agents" could hold people for ransom in 2025 Valley News Live exposed more than a million job seeker’s resumes Small business owners, secure your web shop University site cloned to evade ad detection...

Ransomware Extortion Drops to $813.5M in 2024, Down from $1.25B in 2023

Ransomware attacks netted cybercrime groups a total of $813.5 million in 2024, a decline from $1.25 billion in 2023. The total amount extorted during the first half of 2024 stood at $459.8 million, blockchain intelligence firm Chainalysis said, adding payment activity slumped after July 2024 by...

New AI “agents” could hold people for ransom in 2025

A paradigm shift in technology is hurtling towards us, and it could change everything we know about cybersecurity. Uhh, again, that is. When ChatGPT was unveiled to the public in late 2022, security experts looked on with cautious optimism, excited about the new technology but concerned about its...

The 2024 Ransomware Landscape: Looking back on another painful year

The ransomware landscape in 2024 continued to evolve at a rapid pace, outgrowing many of the trends we saw in 2023. Threat actors remained relentless and innovative, targeting organizations of all sizes and sectors. In this post, we’ll examine the latest data points, discuss notable groups, and...

The 2024 Ransomware Landscape: Looking back on another painful year

The ransomware landscape in 2024 continued to evolve at a rapid pace, outgrowing many of the trends we saw in 2023. Threat actors remained relentless and innovative, targeting organizations of all sizes and sectors. In this post, we’ll examine the latest data points, discuss notable groups, and...