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.
Threat actors have been using multiple websites promoted through Google ads to distribute a convincing PDF editing app that delivers an info-stealing malware called TamperedChef. [...]
Anthropic's Claude Code large language model has been abused by threat actors who used it in data extortion campaigns and to develop ransomware packages. [...]
Google is introducing a new defense for Android called 'Developer Verification' to block malware installations from sideloaded apps sourced from outside the official Google Play app store. [...]
Google is introducing a new defense for Android called 'Developer Verification' to block malware installations from sideloaded apps sourced from outside the official Google Play app store. [...]
State-sponsored hackers linked to the Mustang Panda activity cluster targeted diplomats by hijacking web traffic to redirect to a malware serving website. [...]
Seventy-seven malicious Android apps containing different types of malware were found on Google Play after being downloaded more than 19 million times. [...]
Malware persistence keeps attackers in your systems long after reboots or resets. Wazuh helps detect and block hidden techniques like scheduled tasks, startup scripts, and modified system files—before they turn into long-term compromise. [...]
A new Android malware posing as an antivirus tool software created by Russia's Federal Security Services agency (FSB) is being used to target executives of Russian businesses. [...]