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.
New phishing attacks use a Windows zero-day vulnerability to drop the Qbot malware without displaying Mark of the Web security warnings. [...]
State-backed Chinese hackers launched a spearphishing campaign to deliver custom malware stored in Google Drive to government, research, and academic organizations worldwide. [...]
Phishing emails distributing the QBot malware are using a DLL hijacking flaw in the Windows 10 Control Panel to infect computers, likely as an attempt to evade detection by security software. [...]
The Mirai-based botnet 'RapperBot' has re-emerged via a new campaign that infects IoT devices for DDoS (Distributed Denial of Service) attacks against game servers. [...]
The FBI and CISA revealed in a joint advisory published today that an unnamed Iranian-backed threat group hacked a Federal Civilian Executive Branch (FCEB) organization to deploy XMRig cryptomining malware. [...]
North Korean hackers are using a new version of the DTrack backdoor to attack organizations in Europe and Latin America. [...]