http://twd6bfktlkhwluhj2ghjthx55pnp2dcuuhf6qqjz7vm2krsmwpz6crad.onion/tutorials/windows-and-linux-backdoor-generator-and-multi-session-handler-that-allows-users-to-connect-with-sibling-servers-and-share-their-backdoor-sessions/index.html
The communication between sibling servers is AES encrypted using the recipient sibling server’s ID as the encryption KEY and the 16 first bytes of the local server’s ID as IV. During the initial connection handshake of two sibling servers, each server’s ID is exchanged clear text, meaning that the handshake could be captured and used to decrypt traffic between sibling servers.