W32.Mybabypic.Worm

Printer Friendly Page

Discovered: February 26, 2001
Updated: May 01, 2007 10:54:53 AM
Type: Worm
Infection Length: 77824
Systems Affected: Windows

W32.Mybabypic.Worm is a worm that mails itself to all address in the Microsoft Outlook address book.

SARC has received very few submissions of this worm.

Antivirus Protection Dates

  • Initial Rapid Release version February 26, 2001
  • Latest Rapid Release version March 03, 2008 revision 035
  • Initial Daily Certified version February 26, 2001
  • Latest Daily Certified version March 03, 2008 revision 037
  • Initial Weekly Certified release date February 26, 2001

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

Writeup By: Cary Ng

Discovered: February 26, 2001
Updated: May 01, 2007 10:54:53 AM
Type: Worm
Infection Length: 77824
Systems Affected: Windows

When W32.Mybabypic.Worm is executed, it mails itself to all address in the Microsoft Outlook address book. A very offensive two-frame animation of a baby is also shown.

The email message sent out contains the following subject line:

My baby pic !!!

and contains the following text in its message body:

Its my animated baby picture !!

The file attached has the name:

mybabypic.exe

and has the icon picture:



The W32.Mybabypic.Worm does the following:

  1. It creates duplicate copies of itself in the \Windows\System folder with the following names:
    • WINKernel32.exe
    • Win32DLL.exe
    • cmd.exe
    • command.exe
    • mybabypic.exe
  2. It adds the value:

    WINKernel32 C:\WINDOWS\SYSTEM\WINKernel32.exe

    to the registry key:


    HKEY_LOCAL_MACHINE\Software\
    Microsoft\Windows\CurrentVersion\Run
  3. It adds the value:

    mybabypic C:\WINDOWS\SYSTEM\mybabypic.exe

    to the registry key:

    HKEY_LOCAL_MACHINE\Software\Microsoft\
    Windows\CurrentVersion\RunServices
  4. It sets the default value of the registry key:

    HKEY_USERS\.Default\Software

    to:

    C:\WINDOWS\SYSTEM\Win32DLL.exe
  5. Finally, it adds a new key named:

    Bugger

    with the (Default) value set to:

    HACK[2k]

    and the value:

    mailed

    set to a number from 0 to 3.

On certain dates and times, the worm may do the following.
  1. It goes to the website

    http: //www.myhomepage.com

    using one of the strings below as the form parameter:

    FROM BUGGER
    HAPPY VALENTINES DAY FROM BUGGER
    HAPPY HALLOWEEN FROM BUGGER
  2. It searches for files on your local drive and on all mapped drives. Depending on the file extension, the worm does the following things:

    For VBS and VBE files, the worm permanently corrupts them.

    For C, CPP, CSS, H, HTA, JS, JSE, PAS, PBL, SCT, WSH files, the worm uses the filename with the extension replaced to .EXE, and creates a duplicate copy of itself using this new filename, and deletes the original file. For example, if you have a file called SAMPLE.HTA, the worm creates a duplicate copy of itself with the name SAMPLE.EXE, and the worm will delete the file SAMPLE.HTA.

    For JPG and JPEG files, the worm will simply attach the EXE extension instead of replacing the original file extension. Thus in the example mentioned above, if say the file turned out to be SAMPLE.JPG instead, the duplicate copy of the worm will have the filename SAMPLE.JPG.EXE, and then SAMPLE.JPG will be deleted.

    For MP2, MP3, and M3U files, the worm will grab the filename, add an EXE extension to it, and will use this new filename for its duplicate copy. As for the original file, instead of being deleted, its file attribute is set to hidden. Thus if we have a file called SAMPLE.MP3, the worm will create a duplicate copy of itself with the filename SAMPLE.MP3.EXE, and it will set the file attributes of SAMPLE.MP3 to hidden.
  3. The worm program may also toggle the NumLock, CapsLock, and ScrollLock keys.

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: February 26, 2001
Updated: May 01, 2007 10:54:53 AM
Type: Worm
Infection Length: 77824
Systems Affected: Windows

To remove this worm, delete the infected files, and undo the changes that the worm made to the registry.

To remove the worm:

  1. Run LiveUpdate to make sure that you have the most recent virus definitions.
  2. Start Norton AntiVirus (NAV), and run a full system scan, making sure that NAV is set to scan all files.
  3. Delete any files detected as W32.Mybabypic.Worm.

To edit the registry:

CAUTION : We strongly recommend that you back up the system registry before making any changes. Incorrect changes to the registry could result in permanent data loss or corrupted files. Please make sure you modify only the keys specified. Please see the document How to back up the Windows registry before proceeding.
  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 following key:

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

    WINKernel32 C:\WINDOWS\SYSTEM\WINKernel32.exe
  5. Navigate to the following key:

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

    mybabypic C:\WINDOWS\SYSTEM\mybabypic.exe
  7. Navigate to the following key:

    HKEY_USERS\.Default\Software
  8. In the right pane, double-click (Default).
  9. Delete the contents of the Value Data box, and then click OK.

Writeup By: Cary Ng