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 Sandman group's main malware is among the very few that use the Lua scripting language and its just-in-time compiler.
Attackers use convincing fake website interfaces and sophisticated geo-fencing to target users exclusively in Mexico and Brazil with a new variant of the malware.
A supposed exploit for a notable RCE vulnerability in the popular Windows file-archiving utility delivers a big sting for unwitting researchers and cybercriminals.
The group's use of malware that forces Windows computers to reboot into Safe Mode before encrypting files is noteworthy, advisory says.
The GitLab code hijacks computer resources to mine Dero cryptocurrency as part of a larger cryptomining operation.
"SprySOCKS" melds features from multiple previously known badware and adds to the threat actor's growing malware arsenal, Trend Micro says.