Cybersecurity · · 2 min read

Unmasking the Meduza Stealer: Comprehensive Analysis & Countermeasures

Unmasking the Meduza Stealer: Comprehensive Analysis & Countermeasures

Meduza Stealer: The Silent Predator in the Cyber Jungle


Welcome, cybersecurity enthusiasts, to another deep dive into the fascinating world of cyber threats. Today, we're exploring a new menace that has emerged in the cyber threat landscape - the Meduza Stealer. This potent malware, discovered by the Uptycs Threat Research team, is specifically designed to target Windows users and organizations, with a primary objective of comprehensive data theft. It extracts a wide array of browser-related data, including critical login credentials, browsing history, bookmarks, and even data from crypto wallet extensions, password managers, and 2FA extensions.

The Meduza Stealer is not just another run-of-the-mill ransomware but an actively developed tool with the potential to add new features. It can avoid detection in certain countries and prevent execution if the attacker's server is unreachable, making it an extremely stealth cybersecurity threat.

In this blog post, we'll delve into the intricacies of the Meduza Stealer, revealing its distribution methods, capabilities, potential impact, and the concerted efforts to counter this threat.

Marketing and Distribution Tactics of Meduza Stealer

The administrator of the Meduza Stealer employs sophisticated marketing strategies to promote this malicious offering. They have initiated static and dynamic scans of the Meduza Stealer file using reputable antivirus software, demonstrating that this potent malware could evade detection by these top-tier solutions. The malware does not employ obfuscation techniques, making it harder to identify and trace.

The administrator has been advertising the Meduza Stealer aggressively via cybercrime forums and Telegram channels. They offer access to the stolen data through a user-friendly web panel, presenting different subscription options, including a one-month, three-month, and lifetime access plan, each with its own price point.

Meduza Stealer's Workflow

The Meduza Stealer initiates its operations once it successfully infiltrates a machine. It performs a geolocation check and checks if the attacker's server is active. If both conditions are favorable, the stealer proceeds to gather extensive information, including system information, browser data, password manager details, mining-related registry information, and details about installed games. Once this comprehensive set of data is gathered, it is packaged and uploaded, ready to be dispatched to the attacker's server.

Utilizing APIs and Country Exclusions: How Meduza Stealer Operates

The stealer leverages the GetUserGeoID and GetGeoInfoA APIs on the victim's machine to obtain country details, which are subsequently compared to a predefined list. If the victim's country isn't part of this list, the malware tries to establish a connection with the attacker's server. If the connection fails, the process comes to a halt.

Prevention and Detection

To defend against malware attacks like the Meduza Stealer, it is recommended to regularly install updates for your operating system, browsers, and installed applications, be cautious when downloading files or opening email attachments, employ strong and unique passwords for all your accounts, enable 2FA wherever possible, only install browser extensions from trusted sources, and keep a close eye on your financial accounts.

Uptycs XDR customers can easily scan for Meduza Stealer since Uptycs XDR is armed with YARA process scanning and advanced detections. Additionally, Uptycs XDR contextual detection provides important details about the identified malware.


In the realm of cybersecurity, the emergence of the Meduza Stealer underscores the importance of staying vigilant and proactive. This new threat actor is shaking the foundations of our understanding of data-stealing malware. By understanding its operation and implementing robust security measures, we can change the game in our favor. So, let's stay informed, stay updated, and most importantly, stay safe in this ever-evolving cyber threat landscape.

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