W32.Deev@mm

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Discovered: September 18, 2002
Updated: February 13, 2007 11:58:58 AM
Also Known As: WORM_Deev.A [Trend]
Type: Worm
Systems Affected: Windows


W32.Deev@mm is a mass-mailing worm that uses Microsoft Outlook to send itself to all contacts in the Microsoft Outlook Address Book. The email message has the following characteristics:

Subject:   Download MP3s fast...
Message:  Download this screen saver... look for the password and we will give you 10 free MP3s. Absolutely Free!!!
Attachment: Fre.exe

NOTE: This threat has two components:

  • The Portable Executable (PE) component which is written in the Borland Delphi Programming Language and is compressed. This is detected as W32.Deev@mm.
  • The Visual Basic Script (VBS) component that is created by the PE component. This is detected as VBS.Deev@mm.





What are Portable Executable (PE) files?
PE files are files that are portable across all Microsoft 32-bit operating systems. The same PE-format executable can be executed on any version of Windows 95, 98, Me, NT, 2000, and XP. All PE files are executable, but not all executable files are portable.

A common example of a Portable Executable file is a screen saver (.scr) file.

Antivirus Protection Dates

  • Initial Rapid Release version September 19, 2002
  • Latest Rapid Release version May 31, 2016 revision 036
  • Initial Daily Certified version September 19, 2002
  • Latest Daily Certified version June 01, 2016 revision 005
  • Initial Weekly Certified release date September 25, 2002

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

Writeup By: Yana Liu

Discovered: September 18, 2002
Updated: February 13, 2007 11:58:58 AM
Also Known As: WORM_Deev.A [Trend]
Type: Worm
Systems Affected: Windows


W32.Deev@mm arrives as an email attachment. This attachment is a Portable Executable (PE) file. When this attachment runs, it does the following:

If current system day is Sunday, it displays this fake message:



If current day is not Sunday, it displays this message:



It always displays this fake message,



It copies itself as C:\Windows\Desktop\Freemp3.scr.

Freemp3.scr then creates the Visual Basic Script (VBS) file C:\Windows\Desktop\Readme.txt.vbs. If you run Readme.txt.vbs, it does the following:

It adds the value

(Default) <the PE executed worm program>

to the registry key

HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run

It also adds the value

(Default) C:\Windows\Desktop\readme.txt.vbs

to the registry key

HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Runservices

As a result, both components of the worm run each time that you start Windows.

It uses Microsoft Outlook to send the PE component of the worm to all contacts in the Microsoft Outlook Address Book. The email has the following characteristics:

Subject:  Download MP3s fast...
Message:  Download this screen saver... look for the password and we will give you 10 free MP3s. Absolutely Free!!!
Attachment: Fre.exe

If current system date is the 2nd or 3rd day of the month, it displays this message:



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: Yana Liu

Discovered: September 18, 2002
Updated: February 13, 2007 11:58:58 AM
Also Known As: WORM_Deev.A [Trend]
Type: Worm
Systems Affected: Windows


NOTE: These instructions are for all current and recent Symantec antivirus products, including the Symantec AntiVirus and Norton AntiVirus product lines.

  1. Update the virus definitions.
  2. Restart the computer in Safe mode.
  3. Run a full system scan, and delete all files that are detected as W32.Deev@mm or VBS.Deev@mm.
  4. Delete the value

    (Default) <the PE executed worm program>  

    from the registry key

    HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run

    and the value

    (Default) C:\Windows\Desktop\readme.txt.vbs

    from the registry key

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServices.
For details on how to do this, read the following instructions.

To update the virus definitions:
All virus definitions receive full quality assurance testing by Symantec Security Response before being posted to our servers. There are two ways to obtain the most recent virus definitions:
  • Run LiveUpdate, which is the easiest way to obtain virus definitions. These virus definitions are posted to the LiveUpdate servers one time each week (usually Wednesdays) unless there is a major virus outbreak. To determine whether definitions for this threat are available by LiveUpdate, look at the Virus Definitions (LiveUpdate) line at the top of this write-up.
  • Download the definitions using the Intelligent Updater. Intelligent Updater virus definitions are posted on U.S. business days (Monday through Friday). They must be downloaded from the Symantec Security Response Web site and installed manually. To determine whether definitions for this threat are available by the Intelligent Updater, look at the Virus Definitions (Intelligent Updater) line at the top of this write-up.

    Intelligent Updater virus definitions are available here. For detailed instructions on how to download and install the Intelligent Updater virus definitions from the Symantec Security Response Web site, click here.

To restart the computer in Safe mode:
All Windows 32-bit operating systems, except Windows NT, can be restarted in Safe mode. For instructions on how to do this, read the document How to start the computer in Safe Mode .

To scan for and delete the infected files:
  1. Start your Symantec antivirus program, and make sure that it is configured to scan all files.
  2. Run a full system scan.
  3. If any files are detected as infected with W32.Deev@mm or VBS.Deev@mm, click Delete.

To delete the values that the worm added to the registry:

CAUTION : Symantec strongly recommends that you back up the registry before you make any changes to it. Incorrect changes to the registry can result in permanent data loss or corrupted files. Modify only the keys that are specified. Read the document How to make a backup of the Windows registry for instructions.
  1. Click Start, and click Run. The Run dialog box appears.
  2. Type regedit and then click OK. The Registry Editor opens.
  3. Navigate to the key

    HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
  4. In the right pane, delete the value

    (Default) <the PE executed worm program>
  5. Navigate to the key

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServices
  6. In the right pane, delete the value

    (Default) C:\Windows\Desktop\readme.txt.vbs
  7. Exit the Registry Editor.


Writeup By: Yana Liu