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DETECTION OVERVIEW
Risk Factors
Several malware variants communicate with command-and-control (C&C) servers over the BackConnect protocol. A skilled attacker can take advantage of custom BackConnect messages to run a wide range of C&C commands. BackConnect messages are strong indicators of compromise and should be investigated.
Category
BackConnect is a protocol that enables C&C communication for malware such as IcedID, Qakbot, and Latrodectus. After malware is installed on a device, the malware connects with an attacker-controlled C&C server on ports 443 or 8080. The attacker sends a BackConnect message to the victim. The message can contain several types of commands. Some commands transform the victim into a SOCKS proxy for malicious traffic. Other commands create a reverse shell or launch a hidden VNC remote desktop session with the victim.
Block unnecessary outbound traffic on ports 443 and 8080
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