sf-storybooknpm
Advisory published Updated
sf-storybook is a confirmed malicious npm package (MAL-2026-6261) that steals credentials and exfiltrates sensitive data (malicious version 1.0.0). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in sf-storybook (npm)
What this malware does
On require('sf-storybook'), index.js shells out via child_process to run cat /etc/passwd >./passwd.txt and then POSTs the file contents via curl to http://144.126.158.177:4325/$(whoami)/$(hostname)/ over plaintext HTTP. The package leaks the installer's username, hostname, and full /etc/passwd contents to a hardcoded bare-IP attacker endpoint. The package name impersonates the storybook ecosystem, ships empty author/description metadata, and contains only this exfiltration payload with no functionality matching its implied purpose — a typosquat lure with an embedded credential/host recon stealer.
The OpenSSF Package Analysis project identified 'sf-storybook' @ 1.0.0 (npm) as malicious.
It is considered malicious because:
- The package executes one or more commands associated with malicious behavior.
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
Credential / info stealerFind it
Search your lockfiles and build artifacts for sf-storybook (version 1.0.0).
If you installed it — respond
sf-storybook 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.
Did it already run?
If sf-storybook 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
- OpenSSF: Package Analysis · finder
Detect & block this
O3 blocks sf-storybook-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.