Armorsteal is a Python-based malware kit that steals sensitive data and mines cryptocurrency. It persists on infected Windows systems by installing in a hidden directory and creating scheduled tasks. The malware uses obfuscation and sandbox evasion techniques and includes modules for backdoor access, cryptocurrency mining, keystroke logging, clipboard manipulation, and credential theft from browsers, Discord, wallets, and password managers. It uses multiple command-and-control domains and disables Windows Defender to avoid detection.