lab-helpernpm

On npm install, the package's postinstall hook runs sec_check.js, which enumerates the host's network interfaces and proceeds only if an IPv4 address begins with 18.175. — a subnet-based targeting gate that hides the behavior on most developer/CI machines. When the gate passes, the script reads <INIT_CWD>/myfile.txt from the installer's working directory and uses curl -X POST to upload its contents to a hardcoded plaintext C2 at http://18.175.63.47:8080/collect. The combination of a lifecycle-script auto-execute path, network-identity targeting to evade scanners, hardcoded bare-IP exfiltration endpoint, and reading installer-side files matches a targeted supply-chain attack against a specific environment (likely an AWS/lab subnet).