The Malware tag covers malware families, infrastructure analysis, incident impact, disruption efforts, and defensive guidance to reduce cybersecurity risk.
Search across headline titles and summaries.
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 custom malware used by the state-backed Iranian threat group Drokbk has so far flown under the radar by using GitHub as a "dead-drop resolver" to more easily evade detection.
The supply chain attack is piggybacking off an earlier breach to deploy new wiper malware.
IE is still a vector: South Koreans lured in with references to the deadly Halloween celebration crowd crush in Seoul last October.
Threat actors can weaponize code within AI technology to gain initial network access, move laterally, deploy malware, steal data, or even poison an organization's supply chain.
The successful combo of stolen credentials and social engineering to breach networks is increasing demand for infostealers on the Dark Web.
A single improperly formatted command has effectively killed KmsdBot botnet, security vendor says.