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  3. W32.Takeobel


Risk Level 1: Very Low

February 28, 2007
February 28, 2007 11:06:06 AM
Infection Length:
28,672 bytes
Systems Affected:
Windows 2000, Windows 95, Windows 98, Windows Me, Windows NT, Windows XP
W32.Takeobel is a worm that copies itself to mapped network drives. It also adds an .ln3 extension to any .doc files that it finds on the compromised computer.

Antivirus Protection Dates

  • Initial Rapid Release version February 28, 2007
  • Latest Rapid Release version September 28, 2010 revision 054
  • Initial Daily Certified version February 28, 2007
  • Latest Daily Certified version September 28, 2010 revision 036
  • Initial Weekly Certified release date February 28, 2007
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.

Threat Assessment


  • Wild Level: Low
  • Number of Infections: 0 - 49
  • Number of Sites: 0 - 2
  • Geographical Distribution: Low
  • Threat Containment: Easy
  • Removal: Easy


  • Damage Level: Low
  • Payload: Adds an .ln3 extension to all .doc files on the compromised computer.
  • Modifies Files: Adds an .ln3 extension to .doc files.


  • Distribution Level: Medium
  • Shared Drives: Copies itself to mapped network drives.
Note: On May 14, 2015, modifications will be made to the threat write-ups to streamline the content. The Threat Assessment section will no longer be published as this section is no longer relevant to today's threat landscape. The Risk Level will continue to be the main threat risk assessment indicator.
Writeup By: Hatsuho Honda

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