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Rustonotto

Also known as: CHILLYCHINO

Rustonotto, active since June 2025, is a Rust-compiled malware, representing the first known instance of APT37 leveraging Rust-based malware to target Windows systems.

Linked Threat Actors

APT37

C2 Infrastructure

Hosting/VPS 82%
ISP/Residential 9%
Unknown 9%

Last 7 days

Jun 26, 2026
C2 Hosts: 11

Further Reading