hackers weaponize... really long filenames??

The video discusses how cyber threat actors exploit AI hype by creating fake AI video generator websites to distribute malware, focusing on a technique using Braille pattern blank Unicode characters to hide file extensions in Windows. 2:30

Key Takeaways:
• Threat actors use fake AI websites (e.g., Lumalabsai.in) to deliver malware via malicious social media ads 1:33.
• Malware payloads include info stealers and backdoors, leveraging the Telegram API to exfiltrate credentials and credit card data 1:54.
• Fake websites generate ZIP archives with double extensions (e.g., .mp4.exe) using Braille pattern blank Unicode (U+2800) to hide the .exe extension 4:54.
• The technique works due to Windows Explorer’s limited visibility of long file names and trailing dots, making the extension appear truncated 5:43.
• A PowerShell script automates renaming files with padded Braille characters to mimic legitimate video files 9:45.
• Detection can be achieved via Sigma rules or Aurora Light, searching for Unicode U+2800 in file names or process executions 29:52.

This deceptive technique, while simple and unimpressive, is effective and highlights the importance of file name analysis in endpoint detection. 32:03

Sources:

• 2:30 Discussion of fake AI websites and malware distribution.
• 1:33 Ad campaigns targeting AI tools like Llama AI and Dream Lab.
• 1:54 Malware exfiltra