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The Worm tag covers self-spreading malware that can spread rapidly, plus reported incidents, technical analysis, disruption efforts, and defensive guidance.

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Worms are malware programs that replicate and spread between systems without needing to attach to another file. They may move through exploitable network services, vulnerable applications, removable media, or other connected paths; the route depends on the family. Their defining concern is rapid propagation: one compromised host can seed many others, causing outages or resource exhaustion and, in some cases, delivering additional code or enabling unauthorized access.

Security teams should assess worm reports alongside the affected software and exposure details. Priorities include applying patches or mitigations, disabling unnecessary services, and segmenting networks to limit movement. Monitor for unusual scanning, repeated connection attempts, and clusters of similar infections. During an incident, isolate affected systems, restrict relevant communications where practical, preserve forensic evidence, and verify that vulnerable hosts are remediated before reconnecting them.

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Microsoft Threat Intelligence analyzed a cryptocurrency clipper campaign that combines clipboard theft, wallet replacement, Tor-based communications, and worm-like propagation. Beyond stealing cryptocurrency transactions, the malware establishes persistent access and enables follow-on activity through a lightweight backdoor capability. The post Crypto Clipper uses Tor and worm-like propagation for persistence and control appeared first on Microsoft Security Blog.

A large-scale npm supply chain attack compromised over 90 versions of @redhat-cloud-services packages, silently infecting CI/CD environments and developer systems. The malicious code steals credentials from GitHub, cloud platforms, and local machines, then spreads like a worm by republishing trusted packages. Discover how the attack works, what data is at risk, and the steps you can take to protect your organization. The post Preinstall to persistence: Inside the Red Hat npm Miasma credential-stealing campaign appeared first on Microsoft Security Blog.