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.
The new GuardDuty Malware Protection and Amazon Detective were among 10 products and services unveiled at AWS re:Inforce in Boston this week.
The campaign uses four malicious packages to spread "Volt Stealer" and "Lofy Stealer" malware in the open source npm software package repository.
With Microsoft disabling Office macros by default, threat actors are increasingly using ISO, RAR, LNK, and similar files to deliver malware because they can get around Windows protections.
Just ahead of its headline-grabbing attack on the Italian tax agency, the infamous ransomware group debuted an improved version of the malware featuring parts from Egregor and BlackMatter.
Several threat actors used Amadey Bot previously to steal information and distribute malware such as the GandCrab ransomware and the FlawedAmmy RAT.
In the latest iteration, Qakbot operators are using DLL sideloading to deliver malware, a technique that places legitimate and malicious files together in a common directory to avoid detection.