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  3. W32.Tidserv.G


Risk Level 2: Low

March 22, 2009
August 15, 2012 10:53:06 AM
Also Known As:
W32/TDSS.BU [F-Secure]
Infection Length:
46,592 bytes; 39,879 bytes; 10,752 bytes
Systems Affected:
Windows 2000, Windows 95, Windows 98, Windows Me, Windows NT, Windows Server 2003, Windows Vista, Windows XP
W32.Tidserv.G is a worm that spreads by copying itself to removable drives. It may also simulate a fake DHCP server and download potentially malicious files on to the compromised computer.

For more information, please see the following resources:

Antivirus Protection Dates

  • Initial Rapid Release version March 22, 2009 revision 007
  • Latest Rapid Release version February 19, 2013 revision 016
  • Initial Daily Certified version March 22, 2009 revision 018
  • Latest Daily Certified version April 10, 2011 revision 002
  • Initial Weekly Certified release date March 25, 2009
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: Medium
  • Payload: Downloads additional files and redirects DNS queries.


  • Distribution Level: Medium
  • Shared Drives: Copies itself to removable 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: Mircea Ciubotariu

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