Threat Explorer

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DMsetup.IRC.Worm

DMsetup.IRC.Worm

Discovered:
21 June 2001
Updated:
13 February 2007
Also Known As:
IRC-Worm.DmSetup.c

This is an IRC worm that sends itself to other users in the IRC channel. It creates the Godicq.ini file in the \Mirc folder. Norton AntiVirus detects the Godicq.ini file as IRC.Family.Gen.

NOTE: There are some variants of this worm that use file names other than Godicq.ini.

Antivirus Protection Dates

  • Initial Rapid Release version 22 June 2001
  • Latest Rapid Release version 19 February 2013 revision 016
  • Initial Daily Certified version 22 June 2001
  • Latest Daily Certified version 04 February 2011 revision 002
  • Initial Weekly Certified release date pending
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.

When executed, this worm performs the following actions:
  1. It opens a DOS window and prompts the user to "Press any key."
  2. When a key is pressed, colorful ovals are displayed until another key is pressed.
  3. When that key is pressed, the worm displays the message in a DOS window:

    START UP ERROR: Can not find vital data!
  4. Next, the worm copies itself as Godicq.exe to the following folders (if they exist):

    NOTE: There are some variants of this worm that use file names other than Godicq.exe.
    • C:
    • C:\Windows
    • C:\Mirc
    • C:\Windows\System
    • C:\YOUARENOTSURPOSEDTOBELOOKINGATTHIS
    • C:\Progra~1
    • C:\Dos
    • C:\Quake
    • C:\Doom
    • C:\Doom2
    • C:\Games
    • C:\Pics\
  5. The string GODICQ -inauto is added to the C:\Autoexec.bat file to run the worm at startup.
  6. The next time that Windows starts, the worm creates the Lim.exe file in the same folders in which Godicq.exe was created. It also adds another string, Lim.exe -inauto, to the C:\Autoexec.bat file.
  7. The worm also creates the following files:
    • C:\Mirc\Godicq.ini
    • C:\Mirc\Mirc.ini
    • C:\Mirc\Lim.ini
    • C:\Ni.cfg
  8. The C:\Mirc\Mirc.ini file is copied to C:\Mirc\Bakupwrks.ini.

The C:\Mirc\Godicq.ini and C:\Mirc\Lim.ini files are the actual IRC worm and contain the instructions to send Godicq.exe or Lim.exe to other IRC users. Both Godicq.ini and Lim.ini are detected by Norton AntiVirus as IRC.Family.Gen.

NOTE: There are some variants of this worm that use file names other than Godicq.exe.

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.

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. Write down the names of any files detected as DMsetup.IRC.Worm, and then delete them.
  3. Using Windows Explorer, delete any of the following files that still exist:
    • C:\Mirc\Godicq.ini

      NOTE: This file may be detected as a different file name, depending on the variant.
    • C:\Mirc\Lim.ini
    • C:\Ni.cfg
    • C:\Mirc\Bakupwrks.ini
  4. If you use mIRC, replace Mirc.ini with a backup copy.
  5. Click Start, and click Run.
  6. Type the following, and then click OK.

    edit c:\autoexec.bat

    The MS-DOS Editor opens.
  7. Look for the following lines, and if you find them, delete them:

    GODICQ -inauto
    Lim -inauto
  8. Exit the MS-DOS Editor, and save changes when prompted.


Writeup By: Gor Nazaryan