smb-portal-uikitnpm
Advisory published Updated
smb-portal-uikit is a confirmed malicious npm package (MAL-2026-10616) that steals credentials and exfiltrates sensitive data (malicious version 18.1.1). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in smb-portal-uikit (npm)
What this malware does
Package [email protected] declares a preinstall lifecycle hook that runs node index.js. On npm install, index.js invokes child_process.exec on whoami and id, reads os.hostname(), os.userInfo(), process.platform, and process.cwd(), and POSTs the collected host reconnaissance to a hardcoded attacker-controlled endpoint at https://a2dmzqok5w5seb3fac3w4kvcz35utohd.oastify.com (an oastify.com subdomain, a Burp Collaborator out-of-band interaction host commonly used as an exfiltration/beacon sink). The package ships no legitimate UI-toolkit functionality consistent with its name; the entire install-time behavior is reconnaissance and exfiltration.
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
Credential / info stealerFind it
Search your lockfiles and build artifacts for smb-portal-uikit (version 18.1.1).
If you installed it — respond
smb-portal-uikit 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 smb-portal-uikit 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 smb-portal-uikit-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.