Latest cybersecurity reporting from selected sources.

Researchers found China’s Daxin rootkit and a new Stupig backdoor on a Taiwan firm’s network, suggesting a stealthy intrusion dating back to 2013. Symantec’s Threat Hunter Team found Daxin running on a compromised host at a Taiwan-based subsidiary of a multinational high-tech manufacturer in 2026. Daxin is a Windows kernel-mode rootkit that Symantec first documented […]

An advanced malware previously attributed to a China-linked threat actor has resurfaced after more than four years within a Taiwan manufacturing firm, along with a previously unreported backdoor dubbed Stupig

GodDamn ransomware uses the signed PoisonX driver to disable security tools, marking a more advanced version of the Beast ransomware family. Symantec’s Threat Hunter Team found a new ransomware family called GodDamn that first appeared in the wild on May 21, 2026, and analyzed an attack that took place in early June. The group behind […]

Cybersecurity researchers have flagged a new ransomware family called GodDamn that employs the PoisonX kernel driver to neutralize security software as part of its defense evasion strategy

A new, stealthy backdoor named Mistic has been deployed as part of suspected financially motivated attacks aimed at multiple organizations spanning insurance, education, IT, and professional services sectors since April 2026

Threat actors associated with the DragonForce ransomware have been observed using a custom Go-based remote access trojan (RAT) called Backdoor.Turn to conceal command-and-control (C2) traffic inside Microsoft Teams relay infrastructure

DragonForce hid for months by routing malware traffic through Microsoft Teams infrastructure, masking C2 activity and evading network detection. DragonForce ransomware operators hit a major U.S. services firm and stayed hidden for one to two months by routing their command-and-control traffic through Microsoft’s own Teams relay servers. Symantec’s threat hunters tracked the custom backdoor they […]

Unknown attackers spent at least five months inside the Outlook mailbox of a senior executive at a major global stock exchange, copying the inbox out in small, repeated batches and routing it through Dropbox and OneDrive so the traffic blended into normal cloud activity

Attackers spent five months silently stealing emails from a stock exchange executive’s Outlook account in a suspected espionage operation. A threat actor quietly sat inside a senior executive’s Outlook account at a major global stock exchange for roughly 150 days, from October 2025 to March 2026. Broadcom’s Symantec and Carbon Black threat-hunting team investigated the […]

The Iranian hacking group known as MuddyWater has been linked to a new campaign affecting at least nine organizations across nine countries on four continents in the first quarter of 2026

Cybersecurity researchers have flagged fresh activity from a China-aligned threat actor known as Webworm in 2025, deploying custom backdoors that employ Discord and Microsoft Graph API for command-and-control (C2 or C&C) communications

A new analysis of the Lua-based fast16 malware has confirmed that it was a cyber sabotage tool designed to tamper with nuclear weapons testing simulations

The threat actor known as Harvester has been attributed to a new Linux version of its GoGra backdoor deployed as part of attacks likely targeting entities in South Asia

New research from Broadcom's Symantec and Carbon Black Threat Hunter Team has discovered evidence of an Iranian hacking group embedding itself in several U.S. companies' networks, including banks, airports, non-profit, and the Israeli arm of a software company

New ransomware of choice, same critical targets North Korea’s Lazarus Group appears to have added another tool to its kit. It has begun using Medusa ransomware in extortion attacks targeting at least one US healthcare organization and an unnamed victim in the Middle East, according to Symantec and Carbon Black threat hunters.…

The North Korea-linked Lazarus Group (aka Diamond Sleet and Pompilus) has been observed using Medusa ransomware in an attack targeting an unnamed entity in the Middle East, according to a new report by the Symantec and Carbon Black Threat Hunter Team

Cybersecurity researchers have disclosed details of a new ransomware family called Osiris that targeted a major food service franchisee operator in Southeast Asia in November 2025

Jason Rolleston: Unified Agent and AI Aim to Boost Midmarket Security CapabilitiesBroadcom's integration of Symantec and Carbon Black promises a unified single-agent framework and AI-enhanced threat detection to help small and midmarket businesses defend against sophisticated cyberthreats with limited resources, said Jason Rolleston.

A China-linked threat actor has been attributed to a cyber attack targeting an U.S. non-profit organization with an aim to establish long-term persistence, as part of broader activity aimed at U.S. entities that are linked to or involved in policy issues

Organizations in Ukraine have been targeted by threat actors of Russian origin with an aim to siphon sensitive data and maintain persistent access to compromised networks