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 threat actors behind the Windows-based Grandoreiro banking trojan have returned in a global campaign since March 2024 following a law enforcement takedown in January
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. [...]
Hackers Sought Specific Generative AI Software at Leading US Firm: ProofpointA possible Chinese threat actor is using a variant of the Gh0st RAT malware to steal information from artificial intelligence experts in U.S. companies, federal agencies and academia. On the criminal group's target list was a "leading U.S.-based AI organization."
Cryptocurrency theft and financial fraud are the new M.O. of the 15-year-old malware operation that has hit organizations around the globe.
Researchers believe the attacker is likely China-affiliated, since a previous version of the malware was used by a China nation-state attack group.
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 Korea-linked Kimsuky hacking group has been attributed to a new social engineering attack that employs fictitious Facebook accounts to targets via Messenger and ultimately delivers malware
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. [...]
Google is unveiling a set of new features in Android 15 to prevent malicious apps installed on the device from capturing sensitive data
CPR said exploit builders in .NET and Python have been employed to deploy this malware
A malware botnet called Ebury is estimated to have compromised 400,000 Linux servers since 2009, out of which more than 100,000 were still compromised as of late 2023
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. [...]
Recorded Future details a novel campaign that abuses legitimate internet services to deploy multiple malware variants for credential theft
Last week, the United States joined the U.K. and Australia in sanctioning and charging a Russian man named Dmitry Yuryevich Khoroshev as the leader of the infamous LockBit ransomware group. LockBit's leader "LockBitSupp" claims the feds named the wrong guy, saying the charges don't explain how they connected him to Khoroshev. This post examines the activities of Khoroshev's many alter egos on the cybercrime forums, and tracks the career of a gifted malware author who has written and sold malicious code for the past 14 years.