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.
Cybersecurity researchers have shed light on a novel attack chain that employs phishing emails to deliver an open-source backdoor called VShell
A 55-year-old Chinese national has been sentenced to four years in prison and three years of supervised release for sabotaging his former employer's network with custom malware and deploying a kill switch that locked out employees when his account was disabled
Cybersecurity researchers have disclosed details of a new malware loader called QuirkyLoader that's being used to deliver via email spam campaigns an array of next-stage payloads ranging from information stealers to remote access trojans since November 2024
Threat actors are exploiting a nearly two-year-old security flaw in Apache ActiveMQ to gain persistent access to cloud Linux systems and deploy malware called DripDropper
The threat actors behind the Noodlophile malware are leveraging spear-phishing emails and updated delivery mechanisms to deploy the information stealer in attacks aimed at enterprises located in the U.S., Europe, Baltic countries, and the Asia-Pacific (APAC) region
Cybersecurity researchers have lifted the lid on the threat actors' exploitation of a now-patched security flaw in Microsoft Windows to deploy the PipeMagic malware in RansomExx ransomware attacks
Cybersecurity researchers have discovered a malicious package in the Python Package Index (PyPI) repository that introduces malicious behavior through a dependency that allows it to establish persistence and achieve code execution