The Malware tag covers malware families, infrastructure analysis, incident impact, disruption efforts, and defensive guidance to reduce cybersecurity risk.
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Background for this topic.
Malware is software intentionally created or modified to perform unauthorized or harmful actions on a computer, device, or network. The term covers distinct families and functions, including viruses, worms, trojans, spyware, botnet clients, and ransomware; a single sample may combine several capabilities. Its behavior—not its label—determines the security concern: it may execute code, persist, alter or encrypt data, steal credentials, or provide unauthorized remote access.
For practitioners, malware reporting is most useful when it identifies the family or tool conservatively and provides evidence such as affected platforms, samples, infrastructure, or observed behavior. Defenses include promptly patching vulnerable software, restricting execution and privileges, monitoring endpoints and networks, maintaining tested backups, and isolating suspected systems for analysis. Detection should use behavior and verified indicators rather than names alone, since variants change. If malware processes personal or regulated data, investigations should also address privacy, evidence preservation, and applicable reporting obligations.
Researchers are seeing a rise in attacks spreading the EvilExtractor data theft tool, used to steal users' sensitive data in Europe and the U.S. [...]
The enterprise-targeting Bumblebee malware is distributed through Google Ads and SEO poisoning that promote popular software like Zoom, Cisco AnyConnect, ChatGPT, and Citrix Workspace. [...]
A new Lazarus campaign considered part of "Operation DreamJob" has been discovered targeting Linux users with malware for the first time. [...]
The US, UK, and Cisco are warning of Russian state-sponsored APT28 hackers deploying a custom malware named 'Jaguar Tooth' on Cisco IOS routers, allowing unauthenticated access to the device. [...]
Ex-Conti ransomware members have teamed up with the FIN7 threat actors to distribute a new malware family named 'Domino' in attacks on corporate networks. [...]
QBot malware is now distributed in phishing campaigns utilizing PDFs and Windows Script Files (WSF) to infect Windows devices. [...]
A new Android trojan called 'Chameleon' has been targeting users in Australia and Poland since the start of the year, mimicking the CoinSpot cryptocurrency exchange, an Australian government agency, and the IKO bank. [...]