MALWARE FAMILY
CASTLELOADER
Internal ID: win.castleloader
1
aliases
Last seen:Mar 17, 2026
Intelligence Profile
CastleLoader payloads are distributed as portable executables containing an embedded shellcode, which then invokes the main module of the loader that, in turn, connects to the C2 server in order to fetch and execute the next-stage malware.
Threat Analysis
CASTLELOADER is a malware family tracked by threat intelligence researchers and catalogued in the Malpedia dataset. It represents a distinct malicious software lineage with identifiable code characteristics, behaviors, and victimology.
External References
Quick Facts
TypeMalware Family
Aliases1
Also Known As
win.castleloader
Research Links
Data sourced from Malpedia, Ransomware.live, RansomLook, and CTIWATCH OSINT collection. Actor attribution is based on available intelligence and may be incomplete.