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TROJANIZED SUPER MARIO BROS GAME SPREADS MALWARE

June 26, 2023  By Pierluigi Paganini




RESEARCHERS OBSERVED THREAT ACTORS SPREADING A TROJANIZED SUPER MARIO BROS GAME
INSTALLER TO DELIVER MULTIPLE MALWARE. 

Researchers from Cyble Research and Intelligence Labs (CRIL) discovered a
trojanized Super Mario Bros game installer for Windows that was used to deliver
multiple malware, including an XMR miner, SupremeBot mining client, and the
Open-source Umbral stealer.



The threat actors bundled a legitimate installer file of
super-mario-forever-v702e with the malicious codes. The researchers pointed out
that attackers target gamers because they often use powerful hardware for
gaming, which is excellent for mining cryptocurrencies.


00:00/00:00


Mario Forever is a clone of the original Super Mario that attempts to recreate
the classic Nintendo game very faithfully.

The threat actors tampered with the NSIS installer file “Super-Mario-Bros.exe,”
the resulting executable file includes three separate
executables: “super-mario-forever-v702e.exe,” which is the legitimate Super
Mario game application, along with the malicious executables
named “java.exe” and “atom.exe,” as shown below.

Upon executing the “Super-Mario-Bros.exe” file, it drops
the “super-mario-forever-v702e.exe” executable in the %appdata% directory and
executes it. While executing the file, an Installation Wizard is displayed to
proceed with the installation of the “super-mario-forever-v7.02” program.

Once the software is successfully installed, a user interface is launched to
play the Super Mario Forever game. However, an XMR (Monero) miner and a
SupremeBot mining client are executed in the background.

“When “java.exe” is executed, the malware establishes a connection with a mining
server “gulf[.]moneroocean[.]stream” to carry out cryptocurrency mining
activities.” reads the report published by Cyble. “Concurrently, the malware
gathers valuable data from the victim’s system, including computer name,
username, GPU, CPU, and other relevant details. This sensitive information is
then transferred to a Command and Control (C&C) server via the following URL
API: “hxxp://shadowlegion[.]duckdns[.]org/nam/api/endpoint[.]php””

Upon executing SupremeBot (“atom.exe”), it creates a duplicate of itself and
places the copy in a hidden folder in the installation directory of the game.

Then “atom.exe” initiates the execution of a scheduled task command that creates
a new scheduled task entry that runs every 15 minutes without an end date.

Then the executable terminates the “atom.exe” process and removes its associated
file from the system. Once deleted, the dropped file establishes a connection to
the C&C server and sends it systems information, registers the client, and
receives the configuration for the Monero miner.

In the last stage of the attack, the “atom.exe” retrieves an info-stealing
executable, named “wime.exe”, from the C2. The executable unpacks itself and
loads the open-source malware Umbral Stealer into the process memory.

The malware allows:

 * Capturing screenshots
 * Retrieving browser passwords and cookies
 * Capturing webcam images
 * Obtaining telegram session files and discord tokens
 * Acquiring Roblox cookies and Minecraft session files
 * Collecting files associated with cryptocurrency wallets.

“The expansive and interconnected user base within the gaming community serves
as an appealing target for TAs aiming to exploit vulnerabilities and carry out
various malicious activities.” concludes the report. “This coin-miner malware
campaign leverages the Super Mario Forever game to target gamers and individuals
utilizing high-performance computing machines for gaming purposes. Furthermore,
the malware also deploys a stealer component to illicitly acquire sensitive
information from the victims’ systems, aiming to generate additional financial
profits. The combination of mining and stealing activities leads to financial
losses, a substantial decline in the victim’s system performance, and the
depletion of valuable system resources.”

Follow me on Twitter: @securityaffairs and Facebook and Mastodon

Pierluigi Paganini

(SecurityAffairs – hacking, gaming)




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PIERLUIGI PAGANINI

Pierluigi Paganini is member of the ENISA (European Union Agency for Network and
Information Security) Threat Landscape Stakeholder Group and Cyber G7 Group, he
is also a Security Evangelist, Security Analyst and Freelance Writer.
Editor-in-Chief at "Cyber Defense Magazine", Pierluigi is a cyber security
expert with over 20 years experience in the field, he is Certified Ethical
Hacker at EC Council in London. The passion for writing and a strong belief that
security is founded on sharing and awareness led Pierluigi to find the security
blog "Security Affairs" recently named a Top National Security Resource for US.
Pierluigi is a member of the "The Hacker News" team and he is a writer for some
major publications in the field such as Cyber War Zone, ICTTF, Infosec Island,
Infosec Institute, The Hacker News Magazine and for many other Security
magazines. Author of the Books "The Deep Dark Web" and “Digital Virtual Currency
and Bitcoin”.




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