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:...

CVE-2024-6863

In h2oai/h2o-3 version 3.46.0, an endpoint exposing a custom EncryptionTool allows an attacker to encrypt any files on the target server with a key of their choosing. The chosen key can also be overwritten, resulting in ransomware-like behavior. This vulnerability makes it possible for an attacke...

Medusa Ransomware Uses Malicious Driver to Disable Anti-Malware with Stolen Certificates

The threat actors behind the Medusa ransomware-as-a-service RaaS operation have been observed using a malicious driver dubbed ABYSSWORKER as part of a bring your own vulnerable driver BYOVD attack designed to disable anti-malware tools. Elastic Security Labs said it observed a Medusa ransomware...

Kaspersky Links Head Mare to Twelve, Targeting Russian Entities via Shared C2 Servers

Two known threat activity clusters codenamed Head Mare and Twelve have likely joined forces to target Russian entities, new findings from Kaspersky reveal. "Head Mare relied heavily on tools previously associated with Twelve. Additionally, Head Mare attacks utilized command-and-control C2 servers...

Albabat Ransomware Group Potentially Expands Targets to Multiple OS, Uses GitHub to Streamline Operations

Trend Research encounters new versions of the Albabat ransomware, which appears to target Windows, Linux, and macOS devices. We also reveal the group’s use of GitHub to streamline their ransomware operation...

Jasmin Ransomware - SQL Injection Login Bypass

Exploit Title: Jasmin Ransomware SQL Injection Login Bypass Google Dork: N/A Date: 05-03-2025 Exploit Author: Buğra Enis Dönmez Vendor Homepage: https://github.com/codesiddhant/Jasmin-Ransomware Software Link: https://github.com/codesiddhant/Jasmin-Ransomware Version: N/A Tested on: Windows How t...

H2O Vulnerable to Execution of Arbitrary Files

In h2oai/h2o-3 version 3.46.0, an endpoint exposing a custom EncryptionTool allows an attacker to encrypt any files on the target server with a key of their choosing. The chosen key can also be overwritten, resulting in ransomware-like behavior. This vulnerability makes it possible for an attacke...

GHSA-M37H-8R48-2CXJ H2O Vulnerable to Execution of Arbitrary Files

In h2oai/h2o-3 version 3.46.0, an endpoint exposing a custom EncryptionTool allows an attacker to encrypt any files on the target server with a key of their choosing. The chosen key can also be overwritten, resulting in ransomware-like behavior. This vulnerability makes it possible for an attacke...

CVE-2024-6863

In h2oai/h2o-3 version 3.46.0, an endpoint exposing a custom EncryptionTool allows an attacker to encrypt any files on the target server with a key of their choosing. The chosen key can also be overwritten, resulting in ransomware-like behavior. This vulnerability makes it possible for an attacke...

CVE-2024-6863

In h2oai/h2o-3 version 3.46.0, an endpoint exposing a custom EncryptionTool allows an attacker to encrypt any files on the target server with a key of their choosing. The chosen key can also be overwritten, resulting in ransomware-like behavior. This vulnerability makes it possible for an attacke...

CVE-2024-6863

CVE-2024-6863 affects h2oai/h2o-3 v3.46.0 through an endpoint exposing a custom EncryptionTool that allows an attacker to encrypt arbitrary files on the target server with a key of their choosing, with the key potentially overwritable and ransomware-like behavior described. The vulnerability’s im...

CVE-2024-6863 Encryption of Arbitrary Files with Attacker-Controlled Key in h2oai/h2o-3

In h2oai/h2o-3 version 3.46.0, an endpoint exposing a custom EncryptionTool allows an attacker to encrypt any files on the target server with a key of their choosing. The chosen key can also be overwritten, resulting in ransomware-like behavior. This vulnerability makes it possible for an attacke...

CVE-2024-6863 Encryption of Arbitrary Files with Attacker-Controlled Key in h2oai/h2o-3

In h2oai/h2o-3 version 3.46.0, an endpoint exposing a custom EncryptionTool allows an attacker to encrypt any files on the target server with a key of their choosing. The chosen key can also be overwritten, resulting in ransomware-like behavior. This vulnerability makes it possible for an attacke...