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 number of malware samples is up as attackers aim to compromise users where they work and play: Their smartphones.
Key findings from the research also show three of the four new malware threats on this quarter's top-ten list originated in China and Russia, living-off-the-land attacks on the rise, and more.
A new version of the double-extortion group's malware reflects a growing trend among ransomware actors to expand cybercrime opportunities beyond Windows.
The popular package manager for software developers has been vulnerable to this attack vector for a while, and negligent in fixing the problem, according to a former employee.
A legitimate installer for the popular Nintendo game infects Windows machines with various malware, including a cryptominer and an infostealer, again showcasing the importance of remote worker security hygiene.