The npm package bigops-telephony-ui version 35.7.3 contains malicious code that downloads and executes a platform-specific binary from suspicious external hosts. This binary is saved to temporary directories and executed with elevated permissions, enabling full system compromise. The package masquerades as a React UI component library, but its behavior is inconsistent with this purpose. Any system with this package installed should be considered fully compromised, and all secrets and keys must be rotated from a clean system. Removal of the package alone does not guarantee elimination of the compromise.