The Malware tag covers malware families, infrastructure analysis, incident impact, disruption efforts, and defensive guidance to reduce cybersecurity risk.
Search across headline titles and summaries.
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.
A Linux botnet malware known as XorDdos has witnessed a 254% surge in activity over the last six months, according to latest research from Microsoft
A case of software supply chain attack has been observed in the Rust programming language's crate registry that leveraged typosquatting techniques to publish a rogue library containing malware
Fraudulent domains masquerading as Microsoft's Windows 11 download portal are attempting to trick users into deploying trojanized installation files to infect systems with the Vidar information stealer malware
Ransomware is not a new attack vector. In fact, the first malware of its kind appeared more than 30 years ago and was distributed via 5.25-inch floppy disks. To pay the ransom, the victim had to mail money to a P.O. Box in Panama
Microsoft is warning of an emerging threat targeting internet-connected cryptocurrency wallets, signaling a departure in the use of digital coins in cyberattacks
A new variant of the macOS malware tracked as UpdateAgent has been spotted in the wild, indicating ongoing attempts on the part of its authors to upgrade its functionalities
More than 200 Android apps masquerading as fitness, photo editing, and puzzle apps have been observed distributing spyware called Facestealer to siphon user credentials and other valuable information. "Similar to Joker, another piece of mobile malware, Facestealer changes its code frequently, thus spawning many variants," Trend Micro analysts Cifer Fang, Ford Quin, and Zhengyu Dong said in a
A first-of-its-kind security analysis of iOS Find My function has demonstrated a novel attack surface that makes it possible to tamper with the firmware and load malware onto a Bluetooth chip that's executed while an iPhone is "off." The mechanism takes advantage of the fact that wireless chips related to Bluetooth, Near-field communication (NFC), and ultra-wideband (UWB) continue to operate
An unidentified threat actor has been linked to an actively in-development malware toolkit called the "Eternity Project" that lets professional and amateur cybercriminals buy stealers, clippers, worms, miners, ransomware, and a distributed denial-of-service (DDoS) bot