SoBig.E Worm Virus Information and Removal Help

What is SoBig.E Worm and How Did I Get It?
The SoBig worm spreads through email attachments and shared network folders. It sends copies of itself via is own SMTP engine and obtains the recipient addresses from information found in files with the following extensions:
  • .wab
  • .dbx
  • .htm
  • .html
  • .eml
  • .txt

The details of the email are

<obtained email address>

When constructing the email, the worm spoofs the From field using or an email address that it has obtained from the system, or the user name and the domain of the currently logged on user.

The subject can be:

  • referer.pif
  • 004448554.pif
  • re.document.pif
  • new_document.pif
  • submited.pif
  • Screensaver.scr
  • movie.pif
  • Applications.pif
  • Application.pif
  • Your application
  • Re: Re: Document
  • Re: Re: Application ref. 003644
  • Re: Documents
  • Re: Screensaver
  • Re: Submited (Ref: 003746)
  • Re: Movies
  • Re: Movie
  • Re: Application

The message body contains: Please see the attached zip file for details

What makes this virus unique is the fact the attachment is a zip file which is normal not a problem unless it is unzipped. However Windows XP machines have unzipping built into them when you double-click on the attachment. The attachment is one of the following

  • (Movie.pif)
  • (sky_world.scr)
  • (document.pif)
  • (application.pif)

The worm also attempts to copy itself to the following folders on all the open network shares:

  • \Windows\All Users\Start Menu\Programs\StartUp
  • Documents and Settings\All Users\Start Menu\Programs\Startup

The worm stops spreading via network shares on July 14, 2003.

How to Clean/Delete the SoBig.E worm?

Follow these steps in removing the SoBig.E worm.

1) Terminate the running program

  • Open the Windows Task Manager by either pressing CTRL+ALT+DEL on Win9x machines or CTL+Shift+Tab and clicking on the Processes tab on WinNT/2000/XP machines.
  • Locate the following program, click on it and End Task or End Process

       SFtrb Service or winssk32.exe

  • Close Task Manager

2) Remove the Registry entries

  • Click on Start, Run, Regedit
  • In the left panel go to

HKEY_LOCAL_MACHINE>Software>Microsoft>Windows>Current Version>Run

  • In the right panel, right-click and delete the following entry

SSK Service

Repeat this procedure for the following location

HKEY_CURRENT_USER>Software>Microsoft>Windows>Current Version>Run

  • Close the Registry Editor

3) Delete the infected files

  • Click Start, point to Find or Search, and then click Files or Folders.
  • Make sure that "Look in" is set to (C:) and that "Include subfolders" is checked.
  • In the "Named" or "Search for..." box, type, or copy and paste, the file names:
  • Click Find Now or Search Now.
  • Delete the displayed files.

4) Reboot the computer and run a thorough virus scan using your favorite antivirus program.

for Automatic Removal of the SoBig.E worm, click on the following link

Symantec SoBig.E Automatic Removal Program

Removal of Other SoBig worm viruses



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