MAL-2026-4655 Malicious code in qr-code-styling-temp (npm)

The package's install lifecycle script (node index.js) and its main entry both load lib/core.js, which reads os.userInfo().username, os.hostname(), and the current working directory basename and encodes them into a subdomain of oob.sl4x0.xyz, then triggers a dns.resolve4 lookup of samsung.<user>.<host>.<cwd>.<ts>.oob.sl4x0.xyz. This is an out-of-band DNS exfiltration beacon that fires on every npm install and on every require() of the package, leaking installer identity to an attacker-controlled domain. Module names (os, dns, process, userInfo, hostname, resolve4) and the C2 domain are hidden as String.fromCharCode charcode arrays in lib/b02e30.js and lib/6ad264.js, with os and dns loaded via module.constructor._load(...) to evade static require scanners. The package name impersonates the popular qr-code-styling library but ships an unrelated API surface, and the author email [email protected] shares the same domain as the exfiltration host — confirming the typosquat lure and attacker-controlled infrastructure.

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.