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.
Cybercriminals are abusing Microsoft's Trusted Signing platform to code-sign malware executables with short-lived three-day certificates. [...]
Cybercriminals are abusing Microsoft's Trusted Signing platform to code-sign malware executables with short-lived three-day certificates. [...]
Valve has removed a game titled 'Sniper: Phantom's Resolution' from the Steam store following multiple user reports that indicated its demo installer actually infected their systems with information stealing malware. [...]
A malware operation dubbed 'DollyWay' has been underway since 2016, compromising over 20,000 WordPress sites globally to redirect users to malicious sites. [...]
Ukraine's Computer Emergency Response Team (CERT-UA) is warning about highly targeted attacks employing compromised Signal accounts to send malware to employees of defense industry firms and members of the country's army forces. [...]
A newly discovered information-stealing malware called Arcane is stealing extensive user data, including VPN account credentials, gaming clients, messaging apps, and information stored in web browsers. [...]
Microsoft has discovered a new remote access trojan (RAT) that employs "sophisticated techniques" to avoid detection, ensure persistence, and extract sensitive information data. [...]
Cybercriminals are promoting malicious Microsoft OAuth apps that masquerade as Adobe and DocuSign apps to deliver malware and steal Microsoft 365 accounts credentials. [...]