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Chaos Ransomware Uses msaRAT to Route C2 Traffic Through Headless Chrome and Edge

The Chaos ransomware group ran its command-and-control through the victim’s own browser. Cisco Talos on Thursday detailed msaRAT, the Rust implant behind it, found on a compromised Windows machine ahead of the encryptor.

The implant never opens an outbound connection of its own. Its process talks to 127.0.0.1 and nothing else. It starts Chrome or Edge in headless mode and drives the browser

Nuclear-Sabotage Malware Benchmark Trips Up Most Frontier AI Models

SentinelOne’s new benchmark, built on the Fast16 case, shows which AI models can sustain a malware investigation and which cannot.

The post Nuclear-Sabotage Malware Benchmark Trips Up Most Frontier AI Models appeared first on SecurityWeek.

EU fines Google $1 billion for search, app store antitrust violations

The European Commission fined Google €890 million ($1 billion) on Thursday after finding the company had violated the European Union’s Digital Markets Act (DMA), which ensures fair online competition. […]

China-Nexus JadeProx Uses New TriBack Loader in Government and Healthcare Attacks

An exposed Alibaba Cloud server has revealed a China-nexus operation that Group-IB tracks as JadeProx. The cluster has targeted government, healthcare, and education organizations across Asia and Latin America with a previously undocumented Windows loader called TriBack Loader.

Group-IB found the server in mid-April 2026 in Alibaba Cloud’s Singapore region; it was offline by the time the report

CISA, NSA, FBI and Partners Warn Zimbra Collaboration Suite Users of Ongoing Russian State-Supported Malicious Threat Activity

How Synthetic Identity Fraud is Coming for Machine Identities

Most people understand identity theft as an attacker stealing a real person’s sensitive information and impersonating them. Synthetic identity fraud is much harder to catch. Instead of stealing a real identity, the attacker manufactures a new one, frankensteining together several real data points with fabricated ones to create a person who doesn’t exist. Since no real victim monitors misuse, a

New RefluXFS Linux flaw lets attackers gain root privileges

A nine-year-old race condition vulnerability in the Linux kernel’s XFS filesystem, tracked as CVE-2026-64600, allows local attackers to overwrite protected files and gain root privileges. […]

Attackers Weaponize GitHub Actions Runners to Target cPanel and WHM Servers

Cybersecurity researchers have shed light on a large-scale campaign that has turned compromised GitHub repositories into distributed attack infrastructure designed to target cPanel and WebHost Manager (WHM) instances.

The activity involves malicious Packagist development versions spanning 10 packages associated with a legitimate PHP and DevOps developer, dinushchathurya, between July 12 and 13,

Upbound Group Says Data Breach Led to $13 Million in Fraudulent Contract Losses

Hackers recently obtained non-sensitive customer information and other documents from the company.

The post Upbound Group Says Data Breach Led to $13 Million in Fraudulent Contract Losses appeared first on SecurityWeek.

New msaRAT malware uses Chrome, Edge browsers to route C2 traffic

The Chaos ransomware gang is using a new backdoor dubbed msaRAT that hides command-and-control (C2) communication by routing it through the Chrome or Edge browsers. […]

Author: brangberg