W32.Galil@mm

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Discovered: December 04, 2002
Updated: February 13, 2007 11:48:34 AM
Also Known As: W32.Holar.C@mm, W32/Holar.c@MM [McAfee], W32/Lagel.A [Panda], Win32.Holar.C [CA], WORM_HOLAR.C [Trend], I-Worm.Galil [KAV]
Type: Worm
Systems Affected: Windows


W32.Galil@mm is a mass-mailing worm. After sleeping about 15 minutes, it may overwrite all files in all folders on all writeable drives with 215 bytes of text. It deletes all files on drives D, E, F, and G. It is written in the Microsoft Visual Basic (VB) programming language and compressed with UPX. The size is 80,626 bytes after it is unpacked.

The worm uses its own SMTP engine or Microsoft Outlook to send itself to all addresses that it finds in files on the infected computer. Multiple copies of the worm can be attached to the outgoing email message. The message has the following characteristics:

Subject:  Fwd: Crazy illegal sex !
Message:
Note: forwarded message attached.

The message is disguised as having been forwarded from a Yahoo account. Following the fake Yahoo forwarded headers, the message continues with the following text:

Hii

Is it really illegal in da USA?
who knows :P
if u have a weak heart i warn u
DON'T see dis Clip.
Emagine two young children havin
crazy sex fo da first time togetha !
loooool i'm still wonderin where thier
parents were?

Good ?uck , oh sorry:">
i mean Good Luck :)

Bye

Attachment: iLLeGal.exe

NOTE: Definitions dated prior to December 6, 2002, may detect this threat as W32.Holar.C@mm.

Antivirus Protection Dates

  • Initial Rapid Release version December 05, 2002
  • Latest Rapid Release version September 28, 2010 revision 054
  • Initial Daily Certified version December 05, 2002
  • Latest Daily Certified version September 28, 2010 revision 036
  • Initial Weekly Certified release date December 06, 2002

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


Technical Description


When W32.Galil@mm runs, it does the following,

It displays this message:



It then displays another message that contains the text

it was a lil Joke don't be mad :)

It copies itself as C:\%system%\iLLeGaL.exe and adds the value

iLLeGaL.exe C:\%system%\mplayer.exe

to the registry key

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Runservices

so that the worm runs as a service each time that you start Windows.

NOTE: %system% is a variable. The worm locates the system folder and copies itself to that location. By default this is C:\Windows\System(Windows 95/98/Me), C:\Winnt\System32(Windows 2000/NT), or C:\Windows\System32(Windows XP).

The worm also adds the value

iLLeGal 1

to the registry key

HKEY_LOCAL_MACHINE

This value data increases by one each time when the worm runs.

It creates these files:

  • C:\%system%\Mplayer.exe, which is 13,824 bytes in length. The file attributes are hidden, read-only, and system.
  • C:\%system%\SMTP.ocx, which is 25,737 bytes in length.
  • C:\%system%\Mmails.dll, which is a text file.

NOTE: SMTP.ocx and Mmails.dll do not contain viral code and are not detected as such by Symantec antivirus products.

The worm retrieves and saves the current user's email address to C:\%cystem%\Mmails.dll. It then uses its own SMTP engine or Microsoft Outlook to send itself to all addresses that it finds on the computer. Multiple copies of the worm can be attached to the outgoing email message. The message has the following characteristics:

Subject:  Fwd: Crazy illegal sex !
Message:
Note: forwarded message attached.

The message is disguised as having been forwarded from a Yahoo account. Following the fake Yahoo forwarded headers, the message continues with the following text:

Hii

Is it really illegal in da USA?
who knows :P
if u have a weak heart i warn u
DON'T see dis Clip.
Emagine two young children havin
crazy sex fo da first time togetha !
loooool i'm still wonderin where thier
parents were?

Good ?uck , oh sorry:">
i mean Good Luck :)

Bye

Attachment: iLLeGal.exe

The attachment has the icon that is typically associated with a Shockwave Flash file.

After sleeping about 15 minutes, it may overwrite all files in all folders on all writeable drives and display a message that has the following characteristics:

Title: ZaCker
Text : No Peace Without war,i hate war but im forced to love it,Hidden Power's gonna b there wherever u r

The overwritten files are all 215 bytes, which contains the following text:

 1-No PeaCe WithOut WaR
_
  >> TT TT >>> 11>>>OoO>>9\Om
 >>  TiiT >>>  YX >>OOo>>11\Om
 >> OXBYL -> Haw >> ()()9.9.12MP
_1s00x05y988z877c7y7756477v77x7777g8oro885t55oro312852oro14P,u

2- Made By ZaCker

The worm deletes all files on drives D, E, F, and G.

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.


Removal



NOTES:

  • These instructions are for all current and recent Symantec antivirus products, including the Symantec AntiVirus and Norton AntiVirus product lines.
  • W32.Galil@mm may delete files on an infected computer. If this happens, then you must reinstall the operating system, and restore files from a backup that was made before the infection took place. Contact your computer manufacturer or Microsoft for help reinstalling the operating system.
  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.Galil@mm. Manually delete SMTP.ocx and Mmails.dll.
  4. Delete the value

    iLLeGaL.exe C:\%System%\mplayer.exe

    from the registry keys

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\
    CurrentVersion\RunServices
  5. Delete the value

    iLLeGaL <number>

    from the registry key

    HKEY_LOCAL_MACHINE
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.Galil@mm, click Delete.
  4. Use Windows Explorer to locate and delete these files:
    • C:\%system%\SMTP.ocx
    • C:\%system%\Mmails.dll

To delete the values that the Trojan 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_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\
    CurrentVersion\RunServices
  4. In the right pane for each one, delete the value

    iLLeGaL.exe C:\%System%\mplayer.exe
  5. Navigate to the key

    HKEY_LOCAL_MACHINE
  6. In the right pane, delete the value

    iLLeGaL <number>
  7. Exit the Registry Editor.


Writeup By: Yana Liu