Key Findings Russia-linked APT group Turla has evolved its Kazuar malware from a traditional backdoor into a modular peer-to-peer botnet designed for stealth and persistent access The upgraded malware uses Kernel, Bridge, and Worker modules to distribute tasks and maintain long-term control over compromised systems Only one elected "leader" node communicates with command-and-control servers while other infected machines operate silently, reducing detection risk Kazuar support