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Malicious package

mc-registrynpm

mc-registry is a confirmed malicious npm package (MAL-2026-14294) that executes malicious code on install (malicious versions 1.0.8, 1.0.9, 1.0.10). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in mc-registry (npm)

MAL-2026-14294
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall mc-registry

What this malware does

Package publishes as mc-registry with description 'Theta chain registry', but its README, badges, homepage layout, and package listing copy the legitimate hyperweb-io/chain-registry npm package. The README instructs users to npm install theta-registry and import { assets, chains, ibc } from 'theta-registry', while the shipped name is mc-registry and the shipped API diverges from chain-registry by re-exporting HttpProvider from an unrelated third-party dependency chain-analyze (^1.0.4). The ESM entry esm/index.js performs import { HttpProvider } from 'chain-analyze'; at top level, so any consumer that does import 'mc-registry' loads and executes chain-analyze code in the installer/consumer process. chain-analyze is not part of the chain-registry ecosystem and has no relationship to the advertised 'chain registry' data purpose. The internal accessor is named loadPartnerVaultHttpProvider, further indicating the module funnels callers into an unvetted HTTP provider from the injected dependency. Files esm/mainnet/persistence/chain.js and mainnet/persistence/chain.js contain ping/POST network patterns co-located with chain persistence logic.

Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.

Malicious versions

3 flagged
1.0.81.0.91.0.10

Indicators of compromise (SHA-256)

1a249161c1ee8043be99d6317f1bcaf40a72cf1321ef67e05692caf8829de9f9
50f3053643e65c63fa7d8e3d5c48ae3d659650bd0052137099cd8674232780bc
1a64395cf18ef215fa8debd38d127b7f163f4d347bc898101e13937d3df306bf
c42ee04fcd41f1534533fd9dae42401a535f3c1b02db58d1314c2ac3b6a53938

Detection & response playbook

Malicious package
  1. Find it

    Search your lockfiles and build artifacts for mc-registry (3 malicious versions).

  2. If you installed it — respond

    Remove mc-registry from your project and lockfile, then assume any secrets accessible to the build or runtime were exposed: rotate API keys, tokens, and credentials, and audit for unexpected outbound activity or persistence.

  3. Did it already run?

    If mc-registry was installed, its post-install payload may already have run. Removing the package does not undo that — check outbound connections and credential use from the install window onward.

Frequently asked questions

No. mc-registry on npm has been identified as a malicious package (versions 1.0.8, 1.0.9, 1.0.10 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-018406IN-MAL-2026-018405GHSA-73h8-3qpw-h3wvIN-MAL-2026-019276

References

Credits

  • Amazon Inspector · finder

Detect & block this

O3 blocks mc-registry-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the malicious outbound activity and severs the channel.

Explore

mc-registry (npm) malicious package — MAL-2026-14294 | O3 Security