APT / THREAT GROUP
Flesh Stealer
2
aliases
Last seen:Mar 17, 2026
Intelligence Profile
According to M4lcode, FleshStealer is a sophisticated, modular, and obfuscated .NET-based information-stealing malware designed for comprehensive data exfiltration from Windows systems. Its architecture is built for scale and stealth, utilizing multithreading to simultaneously run multiple data harvesting routines with minimal system disruption. The malware targets a wide range of applications and services, including browsers, messaging apps, email clients, VPNs, cryptocurrency wallets, FTP clients, game launchers, and local file storage.
Threat Analysis
Flesh Stealer is a known-sophistication threat actor of undetermined national origin, engaged in cyber operations with a primary motivation of unknown activity patterns.
External References
Quick Facts
TypeAPT / Threat Group
Aliases2
Also Known As
win.flesh_stealerFlesh Stealer
External Intelligence
Malpedia: win.flesh_stealerResearch Links
Data sourced from Malpedia, Ransomware.live, RansomLook, and CTIWATCH OSINT collection. Actor attribution is based on available intelligence and may be incomplete.