Printer Friendly Page

Discovered: August 23, 2005
Updated: February 13, 2007 12:42:20 PM
Type: Trojan Horse, Worm, Virus
Systems Affected: Windows

Symantec antivirus products exclusively use the virus name Bloodhound.Morphine when a potentially unknown virus is found using Symantec Bloodhound technology. Bloodhound technology consists of heuristic algorithms used to detect unknown viruses. The actual file detected under Bloodhound.Morphine is likely to be infected with a new, packed, 32-bit Windows virus.

Bloodhound.Morphine is detected only in Portable Executable (PE) files. Bloodhound.Morphine can detect any threat within a packed file.

Antivirus Protection Dates

  • Initial Rapid Release version August 22, 2005
  • Latest Rapid Release version August 22, 2005
  • Initial Daily Certified version August 22, 2005
  • Latest Daily Certified version July 23, 2007 revision 035
  • Initial Weekly Certified release date August 23, 2005

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

Technical Description

Submit samples detected as Bloodhound.Morphine to Symantec Security Response so that these new viruses and variants can be identified and assigned specific names. Then, we can analyze them and provide more information about their nature.

To learn how to submit a file, read the document for the type of Symantec antivirus product you are using:

  • Consumer products: If you are using a Symantec antivirus consumer product, such as Norton AntiVirus 2005, click here.
  • Enterprise products: If you are using a Symantec antivirus enterprise (corporate) product, such as Symantec AntiVirus Corporate Edition 8.0, click here.


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.


The following instructions pertain to all current and recent Symantec antivirus products, including the Symantec AntiVirus and Norton AntiVirus product lines.

  1. Disable System Restore (Windows Me/XP).
  2. Update the virus definitions.
  3. Restart the computer in Safe mode or VGA mode.
  4. Run a full system scan and delete all the files detected.
  5. Clear the Temporary Internet Files folder, if required.
  6. Submit the files to Symantec Security Response.

For specific details on each of these steps, read the following instructions.

1. To disable System Restore (Windows Me/XP)
If you are running Windows Me or Windows XP, we recommend that you temporarily turn off System Restore. Windows Me/XP uses this feature, which is enabled by default, to restore the files on your computer in case they become damaged. If a virus, worm, or Trojan infects a computer, System Restore may back up the virus, worm, or Trojan on the computer.

Windows prevents outside programs, including antivirus programs, from modifying System Restore. Therefore, antivirus programs or tools cannot remove threats in the System Restore folder. As a result, System Restore has the potential of restoring an infected file on your computer, even after you have cleaned the infected files from all the other locations.

Also, a virus scan may detect a threat in the System Restore folder even though you have removed the threat.

For instructions on how to turn off System Restore, read your Windows documentation, or one of the following articles:
When you are completely finished with the removal procedure and are satisfied that the threat has been removed, reenable System Restore by following the instructions in the aforementioned documents.

For additional information, and an alternative to disabling Windows Me System Restore, see the Microsoft Knowledge Base article: Antivirus Tools Cannot Clean Infected Files in the _Restore Folder (Article ID: Q263455).

2. To update the virus definitions
Symantec Security Response fully tests all the virus definitions for quality assurance before they are posted to our servers. There are two ways to obtain the most recent virus definitions:
  • Running LiveUpdate, which is the easiest way to obtain virus definitions: These virus definitions are posted to the LiveUpdate servers once each week (usually on Wednesdays), unless there is a major virus outbreak. To determine whether definitions for this threat are available by LiveUpdate, refer to Virus Definitions (LiveUpdate).
  • Downloading the definitions using the Intelligent Updater: The Intelligent Updater virus definitions are posted daily. You should download the definitions from the Symantec Security Response Web site and manually install them. To determine whether definitions for this threat are available by the Intelligent Updater, refer to Virus Definitions (Intelligent Updater).

    The latest Intelligent Updater virus definitions can be obtained here: Intelligent Updater virus definitions. For detailed instructions read the document: How to update virus definition files using the Intelligent Updater.

3. To Restart the computer in Safe mode or VGA mode
Shut down the computer and turn off the power. Wait for at least 30 seconds, and then restart the computer in Safe mode or VGA mode.
  • For Windows 95, 98, Me, 2000, or XP users, restart the computer in Safe mode. For instructions, read the document: How to start the computer in Safe Mode.
  • For Windows NT 4 users, restart the computer in VGA mode.

4. Scanning for and deleting the infected files
  1. Start your Symantec antivirus program and make sure that it is configured to scan all the files.
  2. Run a full system scan.
  3. If any files are detected, click Delete. If the detected files are in the Temporary Internet Files folder, you may not be able to delete them. In this case, write down the full path and file name. Then, after restarting in Normal mode (see next step), follow the instructions in section 5.
  4. Restart the computer in Normal mode. For instructions, read the section on returning to Normal mode in the document: How to start the computer in Safe Mode.

5. To clear the Temporary Internet Files folder, if required
  1. Log onto the computer using the name that was shown in the path that you wrote down in step 4c.

    For example, if the path was:

    C:\Documents and Setting\Linda\Local Settings\Temporary Internet Files\qrwmqczd.dll

    log onto the computer as Linda.

  2. Start Internet Explorer.
  3. Click the Tools menu > Internet Options.
  4. In the Temporary Internet Files section, click the Delete Files button.
  5. Check "Delete all offline content," and then click OK.

6. To submit the files to Symantec Security Response
Symantec Security Response suggests that you submit any files that are detected as generic to Symantec Security Response. For instructions on how to do this, read the following documents: