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According to CISA, this malware is a persistent backdoor that masquerades as a legitimate Barracuda Networks service. The malware is designed to listen to commands received from the Threat Actor’s Command-and-Control through TCP packets. When executed, the malware uses libpcap sniffer to monitor traffic for a magic packet on TCP port 25 (SMTP) and TCP port 587. It checks the network packet captured for a hard-coded string. When the right sequence of packet is captured, it establishes a TCP reverse shell to the C2 server for further exploitation. This allows the TA to execute arbitrary commands on the compromised system. The malware is based on an open-source backdoor program named "cd00r".