MALWARE FAMILY
FastLoader
Internal ID: win.fastloader
1
aliases
Last seen:Mar 17, 2026
Intelligence Profile
FastLoader is a small .NET downloader, which name comes from PDB strings seen in samples. It typically downloads TrickBot. It may create a list of processes and uploads it together with screenshot(s). In more recent versions, it employs simple anti-analysis checks (VM detection) and comes with string obfuscations.
Threat Analysis
FastLoader 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.fastloader
Research Links
Data sourced from Malpedia, Ransomware.live, RansomLook, and CTIWATCH OSINT collection. Actor attribution is based on available intelligence and may be incomplete.