A program that is used to compromise a Windows machine. It installs itself as a server, allowing a hacker with the client counterpart to manipulate the machine more completely than the user at the keyboard. Named as a play on BackOffice, an earlier Microsoft software suite, Back Orifice was created for Windows 95 and 98, and Back Orifice 2000 (BO2K) for Windows NT and subsequent Windows operating systems.
Back Orifice was created by "The Cult of the Dead Cow" (cDc), a hacker organization (www.cultdeadcow.com). There are various "BO removers," which are programs that detect and remove it. See BO remover
. See also back office