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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.

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USB .lnk malware steals crypto via clipboard hijack, replaces wallet addresses, steals seed phrases, and screenshots. Microsoft Threat Intelligence has been tracking a clipboard-stealing malware (Clipper) campaign since February 2026 that targets cryptocurrency wallets. A clipper is a type of malicious software that monitors and manipulates your clipboard, the temporary memory where data is stored […]

Microsoft confirmed the RoguePlanet Defender zero-day (CVE-2026-50656), a privilege escalation flaw, and is developing a security patch. Microsoft has acknowledged the RoguePlanet zero-day affecting Microsoft Defender, tracked as CVE-2026-50656 (CVSS score of 7.8). The vulnerability allows privilege escalation through the Microsoft Malware Protection Engine. The company stated it is aware of the issue and is […]

DragonForce hid for months by routing malware traffic through Microsoft Teams infrastructure, masking C2 activity and evading network detection. DragonForce ransomware operators hit a major U.S. services firm and stayed hidden for one to two months by routing their command-and-control traffic through Microsoft’s own Teams relay servers. Symantec’s threat hunters tracked the custom backdoor they […]

Rokarolla Android malware targets 217 banking and crypto apps, steals credentials, blocks bank calls, intercepts SMS, and disables Play Protect. Zimperium’s zLabs researchers have published a detailed analysis of Rokarolla, a new Android banking trojan named after its command-and-control infrastructure. It spreads through malicious websites masquerading as TikTok and Chrome, one confirmed distribution point being […]

Security Affairs Malware newsletter includes a collection of the best articles and research on malware in the international landscape Malware Newsletter IronWorm: Shai-Hulud’s rustier cousin Trojanized ai-sdk-ollama Delivers Miasma, a Self-Replicating npm Worm via binding.gyp  Inside the Cross-Platform Propagation of a New Gafgyt Variant C0XMO  Using AI Agents to Analyze Malware on REMnux   The Miasma […]