Discovered: June 28, 2001
Updated: February 13, 2007 11:59:48 AM
Type: Trojan Horse


This Trojan horse damages the hard drive boot sector. It is a DOS program that is 68 bytes in length. Parts of the code are very similar to the Standard Antivirus Test File (EICAR).

Antivirus Protection Dates

  • Initial Rapid Release version June 28, 2001
  • Latest Rapid Release version December 26, 2017 revision 020
  • Initial Daily Certified version June 28, 2001
  • Latest Daily Certified version December 27, 2017 revision 008

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

Writeup By: Gor Nazaryan

Discovered: June 28, 2001
Updated: February 13, 2007 11:59:48 AM
Type: Trojan Horse


This file is a Trojan that corrupts the boot sector of a hard drive. To attempt to avoid detection, the Trojan contains code that is very similar to the Standard Antivirus Test File (EICAR). Like one of the EICAR test files, it is 68 bytes in length. This appears to have been done to cause you to believe that it is the test file.

NOTE: Norton AntiVirus detects the true EICAR test file "EICAR Test String.70" or "EICAR Test String.68."

This Trojan calls INT 13, and it uses the call to write junk data to the hard drive boot sector, preventing the computer from booting. It also writes junk data to other sectors of the hard drive, possibly damaging files and folders.

NOTE: This Trojan will not run under Windows NT or 2000.

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: Gor Nazaryan

Discovered: June 28, 2001
Updated: February 13, 2007 11:59:48 AM
Type: Trojan Horse


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 EIC.Trojan.

NOTE: If the Trojan is executed under Windows 95/98/Me, you probably will not be able to restart the computer. You may have to reformat the hard drive, reinstall Windows and all software, and restore all data from a clean backup.

Writeup By: Gor Nazaryan