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.
Google says the ColdRiver Russian-backed hacking group is pushing previously unknown backdoor malware using payloads masquerading as a PDF decryption tool. [...]
Microsoft says that a group of Iranian-backed state hackers are targeting high-profile employees of research organizations and universities across Europe and the United States in spearphishing attacks pushing new backdoor malware. [...]
A previously unknown cybercrime syndicate named 'Bigpanzi' has been making significant money by infecting Android TV and eCos set-top boxes worldwide since at least 2015. [...]
CISA and the FBI warned today that threat actors using Androxgh0st malware are building a botnet focused on cloud credential theft and using the stolen information to deliver additional malicious payloads. [...]
A Phemedrone information-stealing malware campaign exploits a Microsoft Defender SmartScreen vulnerability (CVE-2023-36025) to bypass Windows security prompts when opening URL files. [...]