gx-npm-uinpm

Package published at version 99.99.99 under the gx-npm-* namespace, a shape designed to win npm version resolution against private internal packages of the same name. package.json declares postinstall=node beacon.js, which runs unconditionally on npm install. beacon.js collects the installer's hostname, OS username, current working directory, package name, Node version, and the first 80 environment variable names, then exfiltrates them two ways to the hardcoded out-of-band host d8uectoqtvskhftsa940pm3kth3ahdxn4.oast.me: (1) a DNS lookup encoding the collected identifiers as subdomain labels, and (2) an HTTPS GET with a base64-encoded JSON payload in the query string. Any CI/build system or developer machine that resolves this package against the public npm registry leaks host identity and environment-variable names to an attacker-controlled interactsh/OAST endpoint on every install.

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.