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 observed concealing malicious code in images to deliver malware such as VIP Keylogger and 0bj3ctivity Stealer as part of separate campaigns
Cybersecurity researchers have detailed an attack that involved a threat actor utilizing a Python-based backdoor to maintain persistent access to compromised endpoints and then leveraged this access to deploy the RansomHub ransomware throughout the target network
The North Korea-linked Lazarus Group has been attributed to a new cyber attack campaign dubbed Operation 99 that targeted software developers looking for freelance Web3 and cryptocurrency work to deliver malware
The U.S. Department of Justice (DoJ) on Tuesday disclosed that a court-authorized operation allowed the Federal Bureau of Investigation (FBI) to delete PlugX malware from over 4,250 infected computers as part of a "multi-month law enforcement operation." PlugX, also known as Korplug, is a remote access trojan (RAT) widely used by threat actors associated with the People's Republic of China (PRC
Russia-linked threat actors have been attributed to an ongoing cyber espionage campaign targeting Kazakhstan as part of the Kremlin's efforts to gather economic and political intelligence in Central Asia
Cybersecurity researchers are warning of a new stealthy credit card skimmer campaign that targets WordPress e-commerce checkout pages by inserting malicious JavaScript code into a database table associated with the content management system (CMS)