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.
CISA says new malware known as Submarine was used to backdoor Barracuda ESG (Email Security Gateway) appliances by exploiting a now-patched zero-day bug. [...]
Two new Android malware families named 'CherryBlos' and 'FakeTrade' were discovered on Google Play, aiming to steal cryptocurrency credentials and funds or conduct scams. [...]
A new 'Nitrogen' initial access malware campaign uses Google and Bing search ads to promote fake software sites that infect unsuspecting users with Cobalt Strike and ransomware payloads. [...]
A new Mac malware named "Realst" is being used in a massive campaign targeting Apple computers, with some of its latest variants including support for macOS 14 Sonoma, which is still in development. [...]
A new Mac malware named "Realst" is being used in a massive campaign targeting Apple computers, with some of its latest variants including support for macOS 14 Sonoma, which is still in development. [...]
New details have emerged about Decoy Dog, a largely undetected sophisticated toolkit likely used for at least a year in cyber intelligence operations, relying on the domain name system (DNS) for command and control activity. [...]
The analysis of nearly 20 million information-stealing malware logs sold on the dark web and Telegram channels revealed that they had achieved significant infiltration into business environments. [...]
The North Korean state-sponsored Lazarus hacking group is breaching Windows Internet Information Service (IIS) web servers to hijack them for malware distribution. [...]
Cybercriminals are already utilizing and creating malicious tools based on open source AI language models for phishing and malware development. Learn more from Flare about how threat actors are beginning to use AI. [...]