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.
Docker APIs on Linux servers are being targeted by a large-scale Monero crypto-mining campaign from the operators of the Lemon_Duck botnet. [...]
Threat analysts report the activity of the Russian state-sponsored threat group known as Gamaredon (Armageddon, Shuckworm), is still notably active in Ukrainian computer networks. [...]
The Emotet malware is having a burst in distribution and is likely to soon switch to new payloads that are currently detected by fewer antivirus engines. [...]
Threat analysts have spotted a new variant of the BotenaGo botnet malware, and it's the stealthiest seen so far, running undetected by any anti-virus engine. [...]
Hackers are luring unsuspecting users with a fake Windows 11 upgrade that comes with malware that steals browser data and cryptocurrency wallets. [...]