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Home Alerts

Stealthy BundleBot: Data Theft Malware

July 24, 2023
Reading Time: 2 mins read
in Alerts
Stealthy BundleBot: Data Theft Malware

 

A new malware strain called BundleBot is quietly exploiting .NET single-file deployment techniques, evading detection, and capturing sensitive information from compromised systems.

Disguised as legitimate program utilities, AI tools, and games, it is commonly distributed through Facebook Ads and compromised accounts. The malware targets users with websites posing as Google Bard, an AI chatbot, and tricks victims into downloading a fake RAR archive hosted on cloud storage services like Dropbox, ultimately siphoning data and stealing Facebook login credentials.

In response to BundleBot’s threat, Check Point uncovered its abusive use of dotnet bundle (single-file) format, allowing it to escape static detection. The malware employs a custom-made obfuscation technique and incorporates capabilities to gather data from web browsers, Discord tokens, Telegram, and Facebook accounts, including capturing screenshots. Check Point detected another similar BundleBot sample using HTTPS to exfiltrate information to a remote server in a ZIP archive.

Simultaneously, Malwarebytes discovered a new campaign involving sponsored posts and compromised accounts impersonating Facebook Ads Manager. These campaigns entice users to download rogue Google Chrome extensions, disguised as Google Translate, designed to steal Facebook login information.

Victims are prompted to download a RAR archive containing an MSI installer that launches a malicious extension using the “–load-extension” flag. The captured data is sent using the Google Analytics API to bypass content security policies and facilitate data injection attacks.

The suspected threat actors behind this activity are of Vietnamese origin and have exhibited a keen interest in targeting Facebook business and advertising accounts.

Over 800 victims worldwide, including 310 in the U.S., have fallen prey to these attacks. As cybercriminals continuously evolve their tactics, users and organizations must exercise caution, as anything that appears too good to be true might be a scam in disguise.

Robust security measures and awareness are essential to combat the constantly evolving landscape of social media and cloud platform attacks.

Reference:
  • BYOS – BUNDLE YOUR OWN STEALER
Tags: .NETBundleBotCyber AlertCyber Alerts 2023CyberattackCybersecurityJuly 2023MalwareSensitive dataVulnerabilities
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