Four Threat Clusters Using CastleLoader as GrayBravo Expands Its Malware Service Infrastructure
- Posted on December 9, 2025
- By The Hacker News
- 5 Views
Four Threat Clusters Using CastleLoader as GrayBravo Expands Its Malware Service Infrastructure

GrayBravo drives four CastleLoader threat clusters using phishing, malvertising, and Booking-themed lures across multiple sectors.