The Miasma worm explained: How it Hit Red Hat and Microsoft

Miasma has already hit Red Hat and 73 Microsoft GitHub repos. Here's how it works and what your team can do right now.

Nigel Douglas, Head of Developer Relations at Cloudsmith, breaks down the Miasma worm – a self-replicating supply chain attack and evolved variant of Mini Shai-Hulud from threat group TeamPCP. Learn how Miasma uses the yo-yo attack method to move laterally across registries and workstations, why conventional scanners missed it, and the practical steps security teams can take today, including cooldown policies and continuous risk assessment.

0:00 - What is the Miasma attack?

0:55 - Miasma vs. Shai-Hulud: how the variants differ

1:36 - The yo-yo attack method explained

3:02 - How to know if your organization is impacted

4:08 - The zero-hour gap and what to do during it

5:14 - Cooldown policies: blocking newly published packages

6:21 - How Cloudsmith protects against Miasma-style attacks

This video covers software supply chain security, open source registry poisoning, credential-stealing malware, package cooldown policies, and protecting CI/CD pipelines from self-replicating worm attacks targeting npm, PyPI, and GitHub.

Read the full breakdown: https://cloudsmith.com/blog/miasma-worms-path-of-destruction

If your team pulls from public registries, read the blog and book a demo (https://cloudsmith.com/book-a-demo) to see how Cloudsmith stops attacks like Miasma before they reach your builds.

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