Secret Blizzard Transforms Kazuar into a Modular P2P Botnet Ecosystem

Secret Blizzard (Kazuar) has been re-engineered from a standalone backdoor into a resilient multi-tier P2P botnet with distinct Kernel, Bridge, and Worker modules that elect a single local leader to minimize external traffic. The report describes sophisticated delivery methods (obfuscated Pelmeni dropper and COM-invoked .NET loaders), strong anti-analysis and sandboxing checks, AES-encrypted internal communications, and operational TTPs (Windows Mailslots leader election, local staging directories, Protobuf footprints) that prioritize long-term espionage and stealthy exfiltration over rapid, noisy activity.