This new phishing kit turns PDF files into malware

A new PDF phishing kit is being sold on the dark web, promising customers advanced features, a simple interface, and competitive pricing, experts have warned. Security researchers from Varonis spotted MatrixPDF, an advanced solution being advertised as a legitimate tool, Read More …

RevengeHotels: a new wave of attacks leveraging LLMs and VenomRAT

RevengeHotels, also known as TA558, is a threat group that has been active since 2015, stealing credit card data from hotel guests and travelers. RevengeHotels’ modus operandi involves sending emails with phishing links which redirect victims to websites mimicking document Read More …

Shiny tools, shallow checks: how the AI hype opens the door to malicious MCP servers

In this article, Kaspersky researchers explore how the Model Context Protocol (MCP) — the new “plug-in bus” for AI assistants — can be weaponized as a supply chain foothold. The researchers start with a primer on MCP, map out protocol-level Read More …

CMS Sitecore patches critical zero-day flaw

Popular CMS platform Sitecore has patched a critical zero-day vulnerability found to be being abused in cyberattacks. Security researchers from Mandiant observed threat actors exploiting a zero-day flaw to deploy malware, as well as other legitimate software. The flaw stemmed Read More …

An Earth-Shattering Kaboom: Bringing a Physical ICS Penetration Testing Environment to Life (Part 2)

This is the second in a three-part series on building and using a testing bench for Industrial Control Systems (ICS). In this series, Rapi7 researchers will build a physical test bench, review program logic to find flaws, perform manual exploitation Read More …

Hackers are now hiding malware in the images served up by LLMs

As AI tools become more integrated into daily work, the security risks attached to them are also evolving in new directions. Researchers at Trail of Bits have demonstrated a method where malicious prompts are hidden inside images and then revealed Read More …

A clever new Linux malware is breaking into systems and then shutting the door behind it to avoid detection

A hacker was recently spotted patching someone’s vulnerable cloud Linux instance – but they did not do it out of the goodness of their heart. Security researchers Red Canary observed a threat actor abusing a maximum severity flaw, tracked as Read More …

Malicious Packages Across Open-Source Registries: Detection Statistics and Trends (Q2 2025)

In this previous blog, Fortiguard Labs highlighted a growing trend in the use of open source software (OSS) repositories as channels for malware distribution in supply chain security. With the continued reliance on third-party packages in development workflows, threat actors Read More …