The coinscan package on PyPI (version 0.1.0) contains malicious code that executes encrypted payloads during installation. It fetches an encrypted payload from a suspicious external domain and decrypts it with a hardcoded key, executing the code via exec(). If the network fetch fails, it falls back to a local encrypted payload, ensuring execution even offline. The payload includes sandbox evasion techniques to avoid detection in CI/build environments and targets developer workstations. Additionally, the package uses obfuscation and steganography to hide an infostealer that exfiltrates sensitive data to a command-and-control server referenced via the Polygon blockchain.