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Malicious package

parcel-plugin-asset-copiernpm

Advisory published Updated

parcel-plugin-asset-copier is a confirmed malicious npm package (MAL-2025-190984) that steals credentials and exfiltrates sensitive data (malicious versions 1.1.2, 1.1.3). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in parcel-plugin-asset-copier (npm)

MAL-2025-190984
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall parcel-plugin-asset-copier

What this malware does

The package parcel-plugin-asset-copier 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

2 flagged
1.1.21.1.3

Indicators of compromise (SHA-256)

673f23e65b796cf4a1f8f154217b20f06b26d1f7967750091d901380934e2697
344955077c61592ec46c29550b12878886b0b61f3a7c84e050d6d25756f60bf2
e42728295cc2275c35ab041bfdfdad2142156224d4fbdfd267579151fd88834a
f6145ffe2d6b38dc9026fe85b17a49241195565c7383d70aade358ccd4b991ea

Detection & response playbook

Credential / info stealer

  1. Find it

    Search your lockfiles and build artifacts for parcel-plugin-asset-copier (2 malicious versions).

  2. If you installed it — respond

    parcel-plugin-asset-copier 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 parcel-plugin-asset-copier 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. parcel-plugin-asset-copier on npm has been identified as a malicious package (versions 1.1.2, 1.1.3 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

GHSA-48jp-f8c9-6wqq

References

Credits

  • Amazon Inspector · finder

Detect & block this

O3 blocks parcel-plugin-asset-copier-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

Explore

All malware advisories How O3 detects malware Vulnerability database
parcel-plugin-asset-copier (npm) malicious package — MAL-2025-190984 | O3 Security