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



Backdoor.XHX.160, Backdoor.XHX.173, Black Star


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.


  • XHX 1.60
  • XHX 1.73
  • Xhx 1.74
  • Similar Pests:




    Mines the Sun

    Date of Origin:

    August, 2002

    Place of Origin:



    Default Port:

    7648, 3215 TCP 3215 UDP More info about ports.

    Storage Required:

  • Xhx 1.74: at least 537 KB
  • Restart:

    HKLM\Software\Microsoft\Windows\CurrentVersion\Run HKCR\txtfile\shell\open\command c:\windows\win.ini "run" HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run "Internet.exe" HKEY_CLASSES_ROOT\txtfile\shell\open\command "(Default)" c:\windows\win.ini, [windows] "run"
    Autostarting Pests


    XHX 1.60

    XHX 1.74


    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 XHX 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:


    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:

    August 03, 2004