InvisibleFerret is described as a Python-based backdoor used by Lazarus Group or Famous Chollima in Contagious Interview operations against developers, cryptocurrency workers, finance targets, and other technology professionals. The infection chain relies on fake recruiters, job offers, malicious npm packages, or trojanized installers, then uses cross-platform Python components on Windows, Linux, and macOS. Its capabilities include host fingerprinting, browser credential theft, file scanning, keylogging, clipboard monitoring, encrypted or obfuscated communications, and AnyDesk installation for persistent remote access. The excerpt provides hashes, file paths, registry artifacts, and C2 addresses on uncommon ports such as 1224, 1244, and 1245, giving defenders concrete detection points for developer workstations and supply-chain exposure.