gd-auth-clientnpm
Advisory published Updated
gd-auth-client is a confirmed malicious npm package (MAL-2026-6263) that steals credentials and exfiltrates sensitive data (malicious version 999.0.0). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in gd-auth-client (npm)
What this malware does
package.json declares preinstall: node index.js, which runs automatically on npm install. index.js requires os, dns, https, querystring, and the local package.json, then collects installer host identifiers — homedir (os.homedir()), hostname (os.hostname()), username (os.userInfo().username), configured DNS servers (dns.getServers()), current working directory (__dirname), and the full package.json contents — and POSTs them via HTTPS to 6pwzxcku93yjz1m1mp1ctzofj6pxdn1c.oastify.com/dependency-confusion, a Burp Collaborator (OAST) subdomain controlled by the publisher. The version number 999.0.0 combined with a generic, unscoped name is the standard dependency-confusion shape: the package is published to the public registry to win resolution against an internal/private package of the same name in a victim's build, at which point the preinstall hook beacons home with environment fingerprints suitable for follow-up targeting. Any developer or CI system that resolves this package suffers immediate exfiltration of host identity to an attacker-controlled endpoint at install time.
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
Credential / info stealerFind it
Search your lockfiles and build artifacts for gd-auth-client (version 999.0.0).
If you installed it — respond
gd-auth-client 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 gd-auth-client 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 gd-auth-client-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.