nwfp-build-confignpm
Advisory published Updated
nwfp-build-config is a confirmed malicious npm package (MAL-2026-18107) that steals credentials and exfiltrates sensitive data (malicious versions 0.0.0-stage, 1.0.0). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in nwfp-build-config (npm)
What this malware does
On require() of nwfp-build-config, index.js loads lib/telemetry.js, which immediately runs an IIFE that reads the installer's hostname (os.hostname()) and username (os.userInfo().username), AES-256-CBC-encrypts the pair with a hardcoded 32-byte key, base32-encodes the ciphertext, splits it into DNS labels of up to 50 characters, and leaks the labels via dns.resolve4() queries to subdomains of cdn-assets.liderydigital.com, framed with start/end sentinel queries. The channel is a purpose-built covert DNS tunnel that bypasses HTTP egress controls; errors are swallowed in silent try/catch blocks. The destination is unrelated to the package's declared purpose of providing build configuration, and the 'telemetry' naming plus hardcoded encryption key are cover-story shaping around identity exfiltration.
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
Credential / info stealerFind it
Search your lockfiles and build artifacts for nwfp-build-config (2 malicious versions).
If you installed it — respond
nwfp-build-config 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 nwfp-build-config 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 nwfp-build-config-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.