Port :31337Back Orifice RAT

Back Orifice (often abbreviated as BO) is a software tool originally developed by the hacker collective Cult of the Dead Cow. Designed ostensibly as a legitimate remote administration tool for Windows systems, it quickly gained infamy as a Remote Access Trojan (RAT) due to its ability to install itself surreptitiously on a victim’s machine. Once active, it allows the remote controller to execute commands, browse the file system, manipulate processes, and perform keylogging, among other functions.

Operating primarily over TCP port 31337, Back Orifice establishes a backdoor which listens for connections initiated by the attacker’s client interface. Communication occurs via a custom binary protocol which supports various administrative commands. The tool’s server component is typically installed covertly on the victim’s system, exploiting social engineering techniques or other malware to gain an initial foothold.

Since its release, Back Orifice has served as a prototype for many subsequent RATs, highlighting fundamental remote exploitation techniques that are still employed today. Although the tool itself is now largely obsolete, its design and operational concepts continue to resonate in modern malware families targeting remote administration vulnerabilities.