Tuesday, June 18, 2024

Beware! Hackers Using YouTube Channels to Deliver Lumma Malware

Hackers use YouTube channels to deliver malware due to the huge user base of the platform. By using YouTube channels, hackers disguise their malicious content as:-

  • Legitimate videos
  • Legitimate links

Besides this, the popularity of YouTube also gives the threat actors the ability to evade general security measures. 

By using legitimate-looking channels, threat actors exploit users’ trust in the platform to facilitate the widespread distribution of malware.

As the cybersecurity researchers at Fortinet recently discovered, hackers are actively using YouTube channels to deliver Lumma malware, which is a C-language malware.

Free Webinar

Fastrack Compliance: The Path to ZERO-Vulnerability

Compounding the problem are zero-day vulnerabilities like the MOVEit SQLi, Zimbra XSS, and 300+ such vulnerabilities that get discovered each month. Delays in fixing these vulnerabilities lead to compliance issues, these delay can be minimized with a unique feature on AppTrana that helps you to get “Zero vulnerability report” within 72 hours.

YouTube Channels to Deliver Malware

The fake YouTube videos that the threat actors create are disguised with cracked app content using:- 

  • Sneaky installation guides
  • Tricky TinyURL
  • Cuttly links

To dodge the web filters, threat actors also leverage the following platforms but without using their servers:-

  • GitHub
  • MediaFire

All the shared links lead to a private “.NET” loader for Lumma Stealer, a dark web-advertised malware targeting user data.

Lumma attack flow (Source - Fortinet)
Lumma attack flow (Source – Fortinet)

On the file-sharing platforms, the threat actors keep updating their malicious files to evade the security measures and trick users into downloading the malware in the form of a ZIP file that is dubbed-

  • installer_Full_Version_V.1f2.zip
Hacked YouTube Channel (Source - Fortinet)
Hacked YouTube Channel (Source – Fortinet)

The zip file contains the LNK file that triggers the PowerShell to download the “.NET” execution file from GitHub.

Here the URL which is abbreviated as “hxxp://cutt[.]ly/lwD7B7lp,” connects to the following URL:-

  • hxxps://github[.]com/John1323456/New/raw/main/Installer-Install-2023_v0y.6.6[.]exe

The following two repositories also include the NET loaders and do the same things:-

  • LNK
  • LNK-Ex

The obfuscated PowerShell script which is based on the system environment is loaded by the private .NET loader.

For discreet execution, it does the following things:-

  • Constructs a dictionary
  • Launches the PowerShell process
  • Encodes server IP in Base64

The script assesses system data to retrieve encrypted data and obfuscates it with irrelevant code. While, for the DLL file, which is invoked via “System.Reflection.Assembly]::Load(),” it decrypts the data using:-

  • GZip

PerkyRiggal is a crucial system inspector that decodes Lumma Stealer’s ultimate payload in Resources through PNG files using the ‘BygoLarchen’ for string encoding.

This helps in evading detection, and not only that; it even enforces the following things by checking various factors:-

  • Anti-VM
  • Anti-Debug

After environmental checks, it decrypts resources and triggers ‘SuspendThread’ to transition the thread, which helps inject the payload.

The Lumma Stealer evades detection with obfuscation and does the following things:-

  • Communicates with C&C server
  • Sends POST messages
  • Updates to use HTTPS
  • Targets YouTube channels
  • Use bait ZIP files


Cybersecurity researchers strongly recommended the following recommendations:-

  • Always stay vigilant about unknown app sources.
  • Make sure to use legitimate apps.
  • Always double-check the apps’ security.


IoCs (Source - Fortinet)
IoCs (Source – Fortinet)

Try Kelltron’s cost-effective for free to assess and evaluate the security posture of digital systems


Latest articles

Singapore Police Arrested Two Individuals Involved in Hacking Android Devices

The Singapore Police Force (SPF) has arrested two men, aged 26 and 47, for...

CISA Conducts First-Ever Tabletop Exercise Focused on AI Cyber Incident Response

On June 13, 2024, the Cybersecurity and Infrastructure Security Agency (CISA) made history by...

Europol Taken Down 13 Websites Linked to Terrorist Operations

Europol and law enforcement agencies from ten countries have taken down 13 websites linked...

New ARM ‘TIKTAG’ Attack Impacts Google Chrome, Linux Systems

Memory corruption lets attackers hijack control flow, execute code, elevate privileges, and leak data.ARM's...

Operation Celestial Force Employing Android And Windows Malware To Attack Indian Users

A Pakistani threat actor group, Cosmic Leopard, has been conducting a multi-year cyber espionage...

Hunt3r Kill3rs Group claims they Infiltrated Schneider Electric Systems in Germany

The notorious cybercriminal group Hunt3r Kill3rs has claimed responsibility for infiltrating Schneider Electric's systems...

Hackers Employing New Techniques To Attack Docker API

Attackers behind Spinning YARN launched a new cryptojacking campaign targeting publicly exposed Docker Engine...
Tushar Subhra Dutta
Tushar Subhra Dutta
Tushar is a Cyber security content editor with a passion for creating captivating and informative content. With years of experience under his belt in Cyber Security, he is covering Cyber Security News, technology and other news.

Free Webinar

API Vulnerability Scanning

71% of the internet traffic comes from APIs so APIs have become soft targets for hackers.Securing APIs is a simple workflow provided you find API specific vulnerabilities and protect them.In the upcoming webinar, join Vivek Gopalan, VP of Products at Indusface as he takes you through the fundamentals of API vulnerability scanning..
Key takeaways include:

  • Scan API endpoints for OWASP API Top 10 vulnerabilities
  • Perform API penetration testing for business logic vulnerabilities
  • Prioritize the most critical vulnerabilities with AcuRisQ
  • Workflow automation for this entire process

Related Articles