Microsoft says Secret Blizzard has turned the Kazuar backdoor into a modular P2P botnet built for stealth, persistence, and long-term espionage. The malware uses a leader-based architecture with separate kernel, bridge, and worker modules to collect data and exfiltrate it while reducing external visibility. #SecretBlizzard #Kazuar #Turla #Uroburos #VenomousBear #FSB
Keypoints
- Secret Blizzard upgraded Kazuar into a modular peer-to-peer botnet.
- The malware uses kernel, bridge, and worker modules for different tasks.
- One infected host is elected as the leader to communicate with C2.
- Non-leader systems stay silent to reduce detection and traffic noise.
- Kazuar supports many options for bypassing defenses and stealing data.