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.
Cybercriminals are luring victims into downloading the XMRig cryptomining malware via convincing emails, inviting them to schedule fake interviews using a malicious link.
The most recent iteration of the open source infostealer skates by antivirus programs on Macs, using an encryption mechanism stolen from Apple's own antivirus product.
The malware, found on a Russian cybercriminal site, impersonates e-commerce payment-processing services such as Stripe to steal user payment data from legitimate websites.
A fake Telegram Premium app delivers information-stealing malware, in a prime example of the rising threat of adversaries leveraging everyday applications, researchers say.
The malware, operated by China-backed cyberattackers, has been significantly fortified with new evasive and post-infection capabilities.