Backdoor.Bionet.318

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Discovered: June 19, 2001
Updated: February 13, 2007 11:57:33 AM
Also Known As: Backdoor.Bionet.318 [Kaspersky, BackDoor-FK.svr [McAfee], Troj/Bionet-318 [Sophos], BKDR_BONET.318 [Trend], Win32.Bionet.318.ME [Computer
Type: Trojan Horse
Systems Affected: Windows


Backdoor.Bionet.318 is a malicious backdoor Trojan. Backdoor.Bionet.318 behaves similar to SubSeven, Netbus, and BackOrifice.

Antivirus Protection Dates

  • Initial Rapid Release version June 20, 2001
  • Latest Rapid Release version September 28, 2010 revision 054
  • Initial Daily Certified version June 20, 2001
  • Latest Daily Certified version September 28, 2010 revision 036
  • Initial Weekly Certified release date June 20, 2001

Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.

Writeup By: Cary Ng

Discovered: June 19, 2001
Updated: February 13, 2007 11:57:33 AM
Also Known As: Backdoor.Bionet.318 [Kaspersky, BackDoor-FK.svr [McAfee], Troj/Bionet-318 [Sophos], BKDR_BONET.318 [Trend], Win32.Bionet.318.ME [Computer
Type: Trojan Horse
Systems Affected: Windows


Backdoor.Bionet.318 acts as the server application that allows a remote user to control and retrieve information from your computer. Some of the capabilities include searching, retrieving and sending files, stealing passwords, changing the colors and resolution, playing sounds, and changing the date and time.

When executed for the first time, this program installs itself into the \Windows\System folder using a configurable name. The following registry key is also added with multiple entries:

HKEY_LOCAL_MACHINE\Software\GCI\BioNet 3

Once the server program is installed, the client program can access the server on a predefined, configurable port. The remote user can be notified that the server application has been installed on your computer. The server can send a page using ICQ, send a notification by IRC, or send an email message.

The default server program is packed with UPX, so it may be variable in size, depending on the type and version of packer used.

The server is executed upon Windows startup. Either the Windows registry, Win.ini, or System.ini is modified to run the program automatically.

Recommendations

Symantec Security Response encourages all users and administrators to adhere to the following basic security "best practices":

  • Use a firewall to block all incoming connections from the Internet to services that should not be publicly available. By default, you should deny all incoming connections and only allow services you explicitly want to offer to the outside world.
  • Enforce a password policy. Complex passwords make it difficult to crack password files on compromised computers. This helps to prevent or limit damage when a computer is compromised.
  • Ensure that programs and users of the computer use the lowest level of privileges necessary to complete a task. When prompted for a root or UAC password, ensure that the program asking for administration-level access is a legitimate application.
  • Disable AutoPlay to prevent the automatic launching of executable files on network and removable drives, and disconnect the drives when not required. If write access is not required, enable read-only mode if the option is available.
  • Turn off file sharing if not needed. If file sharing is required, use ACLs and password protection to limit access. Disable anonymous access to shared folders. Grant access only to user accounts with strong passwords to folders that must be shared.
  • Turn off and remove unnecessary services. By default, many operating systems install auxiliary services that are not critical. These services are avenues of attack. If they are removed, threats have less avenues of attack.
  • If a threat exploits one or more network services, disable, or block access to, those services until a patch is applied.
  • Always keep your patch levels up-to-date, especially on computers that host public services and are accessible through the firewall, such as HTTP, FTP, mail, and DNS services.
  • Configure your email server to block or remove email that contains file attachments that are commonly used to spread threats, such as .vbs, .bat, .exe, .pif and .scr files.
  • Isolate compromised computers quickly to prevent threats from spreading further. Perform a forensic analysis and restore the computers using trusted media.
  • Train employees not to open attachments unless they are expecting them. Also, do not execute software that is downloaded from the Internet unless it has been scanned for viruses. Simply visiting a compromised Web site can cause infection if certain browser vulnerabilities are not patched.
  • If Bluetooth is not required for mobile devices, it should be turned off. If you require its use, ensure that the device's visibility is set to "Hidden" so that it cannot be scanned by other Bluetooth devices. If device pairing must be used, ensure that all devices are set to "Unauthorized", requiring authorization for each connection request. Do not accept applications that are unsigned or sent from unknown sources.
  • For further information on the terms used in this document, please refer to the Security Response glossary.

Writeup By: Cary Ng

Discovered: June 19, 2001
Updated: February 13, 2007 11:57:33 AM
Also Known As: Backdoor.Bionet.318 [Kaspersky, BackDoor-FK.svr [McAfee], Troj/Bionet-318 [Sophos], BKDR_BONET.318 [Trend], Win32.Bionet.318.ME [Computer
Type: Trojan Horse
Systems Affected: Windows


Run LiveUpdate to make sure that you have the most recent virus definitions.

  1. Start Norton AntiVirus (NAV), and run a full system scan, making sure that NAV is set to scan all files.
  2. Delete any files detected as Backdoor.Bionet.318.
  3. Although deleting the Trojan files will prevent it from running, we recommend that you look for the entry that the Trojan made in the Windows registry, Win.ini, or System.ini file, and remove it. Please see your Windows documentation for information on how to do this.


Writeup By: Cary Ng