MAL-2026-15847 Malicious code in fieldbase-webapplication-buildtools (npm)

package.json declares preinstall and install lifecycle scripts that collect the installer's username (whoami), hostname, current working directory, and npm package name, base64-encode them, and send them to the hardcoded endpoint https://eoy34oyrep9j5x8.m.pipedream.net via both an HTTPS GET path and a DNS-lookup channel (nslookup against a subdomain of the same host). This fires automatically on npm install with no user interaction. The version number 99.99.99 and package name pattern are consistent with a dependency-confusion lure targeting an internal package name.

The OpenSSF Package Analysis project identified 'fieldbase-webapplication-buildtools' @ 99.99.99 (npm) as malicious.

It is considered malicious because:

• The package communicates with a domain associated with malicious activity.

• The package executes one or more commands associated with malicious behavior.