MAL-2026-6261 Malicious code in sf-storybook (npm)

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.