fnd-storesnpm
Advisory published Updated
fnd-stores is a confirmed malicious npm package (MAL-2026-4565) that executes malicious code on install (malicious versions 0.0.6, 0.0.7). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in fnd-stores (npm)
What this malware does
On npm install, the package's postinstall hook runs node index.js, which collects the installer's hostname, OS platform, current working directory, CI environment indicators, Node version, and OS username via os.hostname(), os.platform(), os.userInfo(), process.cwd(), and process env, and POSTs the payload as JSON to https://webhook.site/604bab71-0179-419e-998e-6f15e524bfd7 (a publisher-controlled webhook bin). The README self-describes the package as a dependency-confusion canary targeting an internal package namespace, and the name is chosen to collide with that internal scope. Any developer or build pipeline that resolves this package leaks internal hostnames, usernames, working-directory paths, and CI job metadata to a third party at install time, without consent. Claimed 'authorized research' status does not change the installer-side harm.
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 fnd-stores (2 malicious versions).
If you installed it — respond
Remove fnd-stores 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 fnd-stores 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 fnd-stores-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.