Back Orifice 1.20


· Overview ·
· Origins ·
· Distribution ·
· Operation ·
· Risks ·
· Detection and Removal ·
· Research ·



Overview

Alias:

Back_Orifice.Dropper trojan [Eset], Backdoor.BO.a [Kaspersky], Backdoor.BO.a2 [Kaspersky], Backdoor.BO.d [Kaspersky], Backdoor/BO.a [Computer Associates], Backdoor/BO.A!Server [Computer Associates], Backdoor/BO.a2 [Computer Associates], Bck/BO.a [Panda], Bck/BO.a2 [Panda], BO.Config trojan [Eset], destructive program [F-Prot], New BackDoor2 [McAfee], Orifice [McAfee], Orifice.cli [McAfee], security risk or a "backdoor" program [F-Prot], Trj/BO.A2 [Panda], Trj/BOr [Panda], W32/Back_Orifice.trojan.124928 [F-Prot], W32/Back_Orifice.trojan.68901 [F-Prot], Win32.Orifice [Computer Associates], Win32/BO.1_20 trojan [Eset], Win32/BO.A trojan [Eset], Win32/BO.C trojan [Eset], Win32/BO.OpC_2_00 trojan [Eset], Win95.BackOrifice [Computer Associates]

Category:

RAT: A Remote Administration Tool, or RAT, is a Trojan that when run, provides an attacker with the capability of remotely controlling a machine via a ""client"" in the attacker's machine, and a ""server"" in the victim's machine. Examples include Back Orifice, NetBus, SubSeven, and Hack'a'tack. What happens when a server is installed in a victim's machine depends on the capabilities of the trojan, the interests of the attacker, and whether or not control of the server is ever gained by another attacker -- who might have entirely different interests. Infections by remote administration Trojans on Windows machines are becoming as frequent as viruses. One common vector is through File and Print Sharing, when home users inadvertently open up their system to the rest of the world. If an attacker has access to the hard-drive, he/she can place the trojan in the startup folder. This will run the trojan the next time the user logs in. Another common vector is when the attacker simply e-mails the trojan to the user along with a social engineering hack that convinces the user to run it against their better judgment.

Backdoor: A secret or undocumented means of getting into a computer system, or software that uses such a means to penetrate a system. Some software has a backdoor placed by the programmer to allow them to gain access to troubleshoot or change the program. Software that is classified as a "backdoor" is designed to exploit a vulnerability in a system, and open it to future access by an attacker.

Dropper: In viruses and trojans, the dropper is the part of the program that installs the hostile code onto the system.

Trojan: Any program with a hidden intent. Trojans are one of the leading causes of breaking into machines. If you pull down a program from a chat room, new group, or even from unsolicited e-mail, then the program is likely trojaned with some subversive purpose. The word Trojan can be used as a verb: To trojan a program is to add subversive functionality to an existing program. For example, a trojaned login program might be programmed to accept a certain password for any user's account that the hacker can use to log back into the system at any time. Rootkits often contain a suite of such trojaned programs.

Similar Pests:

RAT · Backdoor · Dropper · Trojan

Origins

Group:

Cult of the Dead Cow

By This Group:

Back Orifice ·

Date of Origin:

July, 1995

Distribution

Prevalence:

  • Back Orifice 1.20: < 0.00005%
  • More Info

    Clot Factor:

  • Back Orifice 1.20: < 1
  • The "Clot Factor" is a measure of how much a pest "gums up" a machine by adding registry entries, files, and directories. As more objects are placed in a machine, manual removal becomes more difficult and more error-prone.

    Operation

    Storage Required:

  • Back Orifice 1.20: at least 1269 KB
  • Risks

    Detection Issues:

    Difficult to detect by design. May hide from process list. May install with variable names in variable locations.

    Detection and Removal

    Automatic Removal:

    PestPatrol detects this.

    PestPatrol removes this.



    Manual Removal:

    Follow these steps to remove Back Orifice 1.20 from your machine. Begin by backing up your registry and your system, and/or setting a Restore Point, to prevent trouble if you make a mistake.
    Stop Running Processes:

    Kill these running processes with Task Manager:

    Remove Files:

    Remove these files (if present) with Windows Explorer:

    Research

    File Analyses:

    More Info:

  • AllTheWeb, AltaVista, AOL Search, Ask Jeeves, Google, HotBot, Lycos, LookSmart, MSN, Yahoo!
  • Research By:

  • PestPatrol's Pest Research Center
  • Last Revised:

    April 14, 2005