pydanticc is a malicious PyPI package impersonating the legitimate pydantic library. Its setup.py contains a base64-encoded payload that, when decoded and executed during installation, downloads an opaque executable from a personal GitHub release URL, saves it to /tmp, makes it executable, and runs it detached in the background. The shipped Python module is a stub with no real functionality, confirming the package's purpose as a dropper for arbitrary remote code execution. The package exfiltrates cryptocurrency wallet data and possibly other sensitive information. This behavior is concealed by obfuscation and typosquatting techniques.

Installation of pydanticc leads to arbitrary remote code execution on the host system, allowing the attacker to run malicious code with the installer's privileges. The package exfiltrates cryptocurrency wallet data and potentially other sensitive information, posing a significant risk of data theft and system compromise.

Users should avoid installing the pydanticc package and verify package names carefully to prevent typosquatting attacks. Since this is a malicious package on PyPI, remediation involves removing any installed instances of pydanticc and scanning affected systems for signs of compromise. There is no official patch or fix because this is a malicious package rather than a vulnerability in legitimate software. Use only trusted packages from verified sources.