MAL-2026-14055 Malicious code in harmony-app-toolkit (npm)

The package declares a preinstall lifecycle script (preinstall.js) that reads a hex-encoded command from preinstall.json, decodes it with Buffer.from(hex,'hex'), and passes the result to child_process.exec. The decoded command shells out via curl to https://eousft8gflamm91.m.pipedream.net and POSTs the output of whoami, pwd, hostname, and the contents of /etc/passwd from the installing host. The behavior runs automatically on npm install, uses hex encoding to hide the payload string, and sends installer host identity and a system account file to an attacker-controlled Pipedream endpoint.

The OpenSSF Package Analysis project identified 'harmony-app-toolkit' @ 22.0.0 (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.