Definition: The origin of back orifice, a program that makes remote administration of a computer system possible, was legitimate. The initial intent of the software has been twisted into an insidious and malicious threat vector. The malware causes server code to be installed, unknown to a user, which allows for control of the system to be established remotely. The damage that can be done to a system is nearly unlimited.
This particular threat targets earlier versions of Windows-based operating system software. The level of control that is granted to the attacker is at the system-level which makes the successful installation of the program particularly harmful.
Its Relevance: An information system that has been compromised by this remote administration software (regardless of its name) is particularly vulnerable. The attacker can typically gain as much access to the system as the user or owner.
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