Both versions of SparrowDoor used in this campaign constitute onsiderable advances in code quality and architecture compared to older ones. This is sent to the C&C server when it requests information about the host and whenever a new socket is created. All communication between the malware and its C&C server uses the same base packet format, defined in Figure 2. For each file, SparrowDoor sends one message, with the same command ID as the list file command (0x32341132) and the information described in Figure 3. ]comXNNET LLC 2024‑07‑05 SparrowDoor C&C server.