CastleLoader Campaign is a threat campaign tracked across 1 threat cluster and 1 intelligence report mention on ThreatCluster. First observed May 19, 2026; most recent activity May 19, 2026.
Bitdefender researchers have identified that the Microsoft HTML Application Host (MSHTA) utility is being actively exploited by cybercriminals to deliver a variety of malware, including infostealers and loaders. Despite…