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 Emotet malware is now distributed using Microsoft OneNote email attachments, aiming to bypass Microsoft security restrictions and infect more targets. [...]
Ukraine's cyberpolice has arrested the developer of a remote access trojan (RAT) malware that infected over 10,000 computers while posing as game applications. [...]
Android malware 'FakeCalls' is circulating again in South Korea, imitating phone calls for over 20 financial organizations and attempting to fool targets into giving away their credit card details. [...]
A suspected Chinese hacking group has been linked to a series of attacks on government organizations exploiting a Fortinet zero-day vulnerability (CVE-2022-41328) to deploy malware. [...]
Cybercriminals are abusing Adobe Acrobat Sign, an online document signing service, to distribute info-stealing malware to unsuspecting users. [...]
An advanced hacking group named 'Winter Vivern' targets European government organizations and telecommunication service providers to conduct espionage. [...]
Microsoft has patched another zero-day bug used by attackers to circumvent the Windows SmartScreen cloud-based anti-malware service and deploy Magniber ransomware payloads without raising any red flags. [...]