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 banking trojan "Grandoreiro" is spreading in a large-scale phishing campaign in over 60 countries, targeting customer accounts of roughly 1,500 banks. [...]
The Android banking trojan "Grandoreiro" is spreading in a large-scale phishing campaign in over 60 countries, targeting customer accounts of roughly 1,500 banks. [...]
Security researchers discovered two previously unseen backdoors dubbed LunarWeb and LunarMail that were used to compromise a European government's diplomatic institutions abroad. [...]
The North Korean hacker group Kimsuki has been using a new Linux malware called Gomir that is a version of the GoBear backdoor delivered via trojanized software installers. [...]
The North Korean hacker group Kimsuki has been using trojanized software packages to deliver a new Linux malware called Gomir in cyberespionage campaigns against targets in South Korea. [...]
Today, Google announced new security features coming to Android 15 and Google Play Protect that will help block scams, fraud, and malware apps on users' devices. [...]
Today, Google announced new security features coming to Android 15 and Google Play that will help block scams, fraud, and malware apps on users' devices. [...]
Microsoft has fixed a zero-day vulnerability exploited in attacks to deliver QakBot and other malware payloads on vulnerable Windows systems. [...]
A malware botnet known as 'Ebury' has infected almost 400,000 Linux servers since 2009, with roughly 100,000 still compromised as of late 2023. [...]