MAL-2026-4859 Malicious code in telethon-pro-safe (PyPI)

During installation, package executes obfuscated code that starts a RAT-like software allowing remote control and exfiltrating sensitive data.

Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers.

Campaign: 2026-05-telethon-pro-safe

Reasons (based on the campaign):

• rat

• The package overrides the install command in setup.py to execute malicious code during installation.

• exfiltration-credentials

• exfiltration-browser-data

• The package contains code to execute remote commands (probably limited to a specific set) on the victim's machine.

• The package contains code to detect if it is running in a sandbox environment.

• The package contains code to exfiltrate basic data from the system, like IP or username. It has a limited risk.

• infostealer

• obfuscation