Bridge


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



Overview

Alias:

Spyware/Bridge [Panda], Trojan Horse [Panda], TrojanSpy.Win32.Briss.a, TrojanSpy.Win32.Briss.a [Kaspersky], TrojanSpy.Win32.Briss.b [Kaspersky], TrojanSpy.Win32.Briss.g [Kaspersky], TrojanSpy.Win32.Briss.h [Kaspersky], TrojanSpy.Win32.Briss.i [Kaspersky], Win32/Spy.Briss.A trojan [Eset], Win32/Spy.Briss.G trojan [Eset], Win32/Spy.Briss.H trojan [Eset], Win32/TrojanDownloader.Bridge.A trojan [Eset]

See Also:

TrojanSpy.Win32.Briss.a

Category:

Browser Helper Object: (BHO). A component that Internet Explorer will load whenever it starts, shares IE's memory context, can perform any action on the available windows and modules. A BHO can detect events, create windows to display additional information on a viewed page, monitor messages and actions. Microsoft calls it "a spy we send to infiltrate the browser's land." BHOs are not stopped by personal firewalls, because they are seen by the firewall as your browser itself. Some exploits of this technology search all pages you view in IE and replace banner advertisements with other ads. Some monitor and report on your actions. Some change your home page.

Downloader: A program designed to retrieve and install additional files, when run. Most will be configured to retrieve from a designated web or FTP site.

Key Logger: (Keystroke Logger). A program that runs in the background, recording all the keystrokes. Once keystrokes are logged, they are hidden in the machine for later retrieval, or shipped raw to the attacker. The attacker then peruses them carefully in the hopes of either finding passwords, or possibly other useful information that could be used to compromise the system or be used in a social engineering attack. For example, a key logger will reveal the contents of all e-mail composed by the user. Keylog programs are commonly included in rootkits and RATs (remote administration trojans).

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.

Variants:

  • BridgeW
  • Similar Pests:

    Browser Helper Object · Downloader · Key Logger · Trojan

    Origins

    Programming Language:

    Java

    Date of Origin:

    Variants from December, 2003 to April, 2004

    Distribution

    Prevalence:

  • Bridge: 0.1%
  • More Info

    Clot Factor:

  • Bridge: 3
  • 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.

    Growth:

  • Bridge: Insufficient data to report growth
  • Operation

    Storage Required:

  • Bridge: at least 829 KB
  • BridgeW: at least 21 KB
  • Browser Performance:

    Likely to slow performance of Internet Explorer.

    Detection and Removal

    Automatic Removal:

    PestPatrol detects this.

    PestPatrol removes this.



    Manual Removal:

    Follow these steps to remove Bridge 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:

    Unregister DLLs:

    Unregister these DLLs with Regsvr32, then reboot:

    Clean Registry:

    Remove these registry items (if present) with RegEdit:

    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 15, 2005