TAG-150 Hackers Escalate Attacks with Proprietary Malware Families

A sophisticated threat actor, TAG-150, active since at least March 2025. Characterized by rapid malware development, technical sophistication, and a sprawling multi-tiered infrastructure, TAG-150 has deployed several self-developed families—CastleLoader, CastleBot, and most recently CastleRAT—targeting organizations via phishing campaigns and fraudulent…