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.
What if malware didn't require an operating system to function? How would anyone possibly notice, let alone disable it?
Thorium enhances cybersecurity teams' defense capabilities by seamlessly integrating commercial, open-source, and custom tools used to analyze malware.
An ongoing AitM campaign by the infamous Moscow-sponsored cyber threat actor has widened its scope, dropping the dangerous ApolloShadow custom backdoor malware thanks to lawful intercept systems.
A new infostealing malware making the rounds can exfiltrate credentials and other system data even from browsing software considered more privacy-focused than mainstream options.