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Security · Updated 21 Oct, 05:35 pm IST

China-aligned 'Bronze Sandcastle' uses Sandboxie DLL sideloading to install backdoors

Image: The Hacker News

Why it matters for readers: If you follow cybersecurity, it shows a new named threat actor and a specific technique (Sandboxie DLL sideloading) to watch for.

  • A new, previously undocumented China-aligned threat cluster has been named Bronze Sandcastle.1
  • Bronze Sandcastle has been observed targeting organizations in Asia and Africa since mid-2025.1
  • The group consistently uses Sandboxie DLL sideloading as its primary technical marker to deploy backdoors.1
  • The disclosure and technical details were published by a Sophos researcher, Gabor Szappanos.1

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