Chaos
Microsoft Teams vishing attacks lead to Chaos ransomware attacks
Threat actors are impersonating IT support staff in Microsoft Teams calls to gain remote access to corporate devices and deploy Chaos ransomware in attacks targeting North American organizations. Sophos tracks the campaign as STAC4749 and says it targeted dozens of organizations between February and June 2026. At least three of these intrusions led to the […]
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. The malware is written in Rust and uses the Chrome DevTools Protocol (CDP) to control a headless browser session and establish a connection to the attacker’s server. Since the malware routes […]
FBI seizes $2.4M in Bitcoin from new Chaos ransomware operation
FBI Dallas has seized approximately 20 Bitcoins from a cryptocurrency address belonging to a Chaos ransomware member that is linked to cyberattacks and extortion payments from Texas companies. The crypto was seized on April 15, 2025, and was traced to an affiliate named “Hors,” who is suspected of launching the attacks against the companies. “The seized funds […]
Arch Linux pulls AUR packages that installed Chaos RAT malware
Arch Linux has pulled three malicious packages uploaded to the Arch User Repository (AUR) were used to install the CHAOS remote access trojan (RAT) on Linux devices. The packages were named “librewolf-fix-bin”, “firefox-patch-bin”, and “zen-browser-patched-bin,” and were uploaded by the same user, “danikpapas,” on July 16. The packages were removed two days later by the […]
Tax resolution firm Optima Tax Relief hit by ransomware, data leaked
U.S. tax resolution firm Optima Tax Relief suffered a Chaos ransomware attack, with the threat actors now leaking data stolen from the company. Optima Tax Relief is a well-known U.S. tax resolution and settlement firm that helps individuals and businesses in addressing and fixing federal and state tax issues. The company claims to be the […]