minimal-minimal

VBS/Generic

VBS/Generic

Threat Detail

  • Malware Type: Virus
  • Malware Sub-type: Script
  • Protection Added: 2004-04-15

This is a virus detection. Viruses are programs that self-replicate recursively, meaning that infected systems spread the virus to other systems, which then propagate the virus further. While many viruses contain a destructive payload, it's quite common for viruses to do nothing more than spread from one system to another.

File Information -

  • MD5  -  251C60786BEDC20E4DC1BC8C2F982B2A
  • SHA  - ADCD9317331FFD025D36C800632B42234CBF2E50

Aliases -

  • Ikarus - Worm.VBS.Milgotie
  • K7AntiVirus - EmailWorm
  • Microsoft - Worm:VBS/Milgotie.A
  • DrWeb - modification of VBS.Generic.601

Minimum Engine

5400.1158

File Length

varies

Description Added

2004-04-15

Description Modified

2004-04-15

Malware Proliferation

fpo-ti-severity-legend logo-new-mcafee

VBS/Generic is a malware that attempts to copy itself into the subfolders of any accessible removable disk volumes. It creates copies of itself into the subfolders of the disk with filenames similar to existing disk directories.

Upon execution the Trojan copies itself into the below mentioned location and logoff the system.

  • %WinDir%\system32\Folder.vbs

The following keys have been added to the system.

  • HKEY_LOCAL_MACHINE\SYSTEM\ControlSet002\Services\WS2IFSL\G

The following values have been modified to the system.

  • [HKEY_CLASSES_ROOT\VBSFile\DefaultIcon]
     (Default) = %SystemRoot%\System32\WScript.exe,2
     (Default) = shell32.dll,3
  • [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon]
    Userinit = "%WinDir%\system32\userinit.exe,"
    Userinit = "%WinDir%\system32\userinit.exe, %WinDir%\system32\wscript.exe %WinDir%\system32\Folder.vbs

The Above mentioned registry entry confirms that the malware inject its malicious code into the Winlogon.exe process. It also adds the above registry key to run again after reboot.

[Note : C:\WINDOWS  is %WinDir%]

All Users:

Please use the following instructions for all supported versions of Windows to remove threats and other potential risks:

1.Disable System Restore .

2.Update to current engine and DAT files for detection and removal.

3.Run a complete system scan.

Modifications made to the system Registry and/or INI files for the purposes of hooking system startup, will be successfully removed if cleaning with the recommended engine and DAT combination (or higher).

1. Please go to the Microsoft Recovery Console and restore a clean MBR.

On windows XP:

Insert the Windows XP CD into the CD-ROM drive and restart the computer.
When the "Welcome to Setup" screen appears, press R to start the Recovery Console.
Select the Windows installation that is compromised and provide the administrator password
Issue 'fixmbr' command to restore the Master Boot Record
Follow onscreen instructions
Reset and remove the CD from CD-ROM drive.


On Windows Vista and 7:

Insert the Windows CD into the CD-ROM drive and restart the computer.
Click on "Repair Your Computer"
When the System Recovery Options dialog comes up, choose the Command Prompt.
Issue 'bootrec /fixmbr' command to restore the Master Boot Record
Follow onscreen instructions
Reset and remove the CD from CD-ROM drive.

The worm spreads itself through USB drives.
  • Presence of above mentioned files and registry keys.
  • Presence of above mentioned activities.