Python-Based “XillenStealer” Campaign Targets Windows Users’ Sensitive Data

A sophisticated Python-based information stealer named XillenStealer has emerged as a significant threat to Windows users, designed to harvest sensitive system data, browser credentials, and cryptocurrency wallet information.

XillenStealer operates through a comprehensive builder framework called “XillenStealer Builder V3.0,” featuring a Python-based Tkinter GUI that enables threat actors to configure and customize their attacks with minimal technical expertise.

The builder includes password authentication via SHA-256 hash validation and allows operators to configure exfiltration channels through Telegram bot integration.

The malware’s modular design enables selective targeting of specific applications and services, including Discord, Steam, cryptocurrency wallets, Telegram sessions, and gaming launchers.

Security researchers at Cyfirma have identified this open-source malware as publicly available on GitHub, making it easily accessible to cybercriminals of varying skill levels.

This flexibility allows attackers to tailor their campaigns based on specific victim profiles or organizational targets.

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