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Malicious package

@quick-start-soft/quick-markdownnpm

Malicious code in @quick-start-soft/quick-markdown (npm) Remove it immediately and rotate any exposed credentials.

MAL-2025-190821
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall @quick-start-soft/quick-markdown

What this malware does

The package @quick-start-soft/quick-markdown was found to contain malicious code.

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.

This package was compromised by the Sha1-Hulud: The Second Coming NPM worm. The malicious payload steals tokens and credentials and publishes them to GitHub. The worm will propogate itself to NPM packages the user owns and establish persistence is a GitHub action. The package may also destroy the user's home directory.

Malicious versions

1 flagged
1.4.2511142126

Indicators of compromise (SHA-256)

923e98b7d6ce2d627ea0131770af8957a47a7ca0633094b77ff80bc756af9890
2ca1d035d2df4ccdc9ea1fc08b5a04c8aa2708547726e92b9ba4138764427ee8
9b867dc6077451572e2027205309d1ac201c8d84ddd3b947c16f482b76c00ac2
1031758f3b20a5b3e6811f051f1af8ade6f2125500452617dd4e9239bf627eba

Detection & response playbook

Credential / info stealer

  1. Find it

    Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for @quick-start-soft/quick-markdown (version 1.4.2511142126). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging @quick-start-soft/quick-markdown across your stack and pipelines.

  2. If you installed it — respond

    @quick-start-soft/quick-markdown is built to steal secrets, so assume every credential the build or runtime could read is compromised. Remove it from your project and lockfile, then rotate ALL exposed secrets — npm/registry tokens, cloud keys, CI/CD secrets, SSH keys, and any .env values — from a known-clean machine. Audit logs for unauthorized use of those credentials.

  3. Did it already run?

    If @quick-start-soft/quick-markdown was ever installed, its post-install/runtime payload may have already executed. O3's L7 egress monitoring and runtime eBPF sensors detect the credential exfiltration or command-and-control callback after install and block the malicious outbound channel, so you catch and contain the actual compromise — not just the presence of the package.

  4. How O3 protects you

    O3 blocks @quick-start-soft/quick-markdown before install through its supply-chain scanner, and if it has already run, detects and severs the exfiltration or C2 callback at runtime through L7 egress monitoring and eBPF.

Frequently asked questions

No. @quick-start-soft/quick-markdown on npm has been identified as a malicious package (version 1.4.2511142126 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

GHSA-f5p2-8h9p-hw8w

References

Credits

  • Amazon Inspector · finder

Detect & block this

O3 blocks @quick-start-soft/quick-markdown-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.

Malware detection Runtime egress monitoring
@quick-start-soft/quick-markdown (npm) malicious package — MAL-2025-190821 | O3 Security