frenchworldcupwinnpm
Advisory published Updated
frenchworldcupwin is a confirmed malicious npm package (MAL-2026-14318) that executes malicious code on install (malicious versions 1.0.0, 1.0.1, 2.0.0…). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in frenchworldcupwin (npm)
What this malware does
package.json declares its sole runtime dependency client-marker-packet-cluster as an arbitrary HTTPS tarball URL on a non-registry host (artifacts.stg.yosiroute.com), and index.js unconditionally re-exports that dependency via module.exports = require('client-marker-packet-cluster'). Installing this package causes npm to fetch and load code from that host into the installer's dependency graph with no version pin, no integrity hash, and no publisher relationship to the declared repository. Whoever controls artifacts.stg.yosiroute.com controls the code that executes when a consumer of this package require()s it. Package metadata is placeholder-shape (author Package Registry, description Generated package, repository pointing to a non-existent github.com/example/... org), so no legitimate publisher context anchors the external code source.
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
Indicators of compromise (SHA-256)
Detection & response playbook
Malicious packageFind it
Search your lockfiles and build artifacts for frenchworldcupwin (4 malicious versions).
If you installed it — respond
Remove frenchworldcupwin 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.
Did it already run?
If frenchworldcupwin 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
Campaign
References
Credits
- Amazon Inspector · finder
Detect & block this
O3 blocks frenchworldcupwin-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.