1. /
  2. Security Response/
  3. W32.Mytob.DF@mm


Risk Level 2: Low

June 3, 2005
February 13, 2007 12:39:47 PM
Also Known As:
Win32.Mytob.DW [Computer Assoc, Net-Worm.Win32.Mytob.be [Kaspe, W32/Mytob.bq@MM [McAfee], W32/Mytob-BE [Sophos], WORM_MYTOB.CM [Trend Micro]
Systems Affected:
Windows 2000, Windows 95, Windows 98, Windows Me, Windows NT, Windows Server 2003, Windows XP

W32.Mytob.DF@mm is a mass-mailing worm that has back door capabilities and uses its own SMTP engine to send an email to addresses that it gathers from the compromised computer.

Antivirus Protection Dates

  • Initial Rapid Release version June 3, 2005
  • Latest Rapid Release version June 3, 2005
  • Initial Daily Certified version June 3, 2005
  • Latest Daily Certified version June 3, 2005
  • Initial Weekly Certified release date June 3, 2005
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.

Threat Assessment


  • Wild Level: Low
  • Number of Infections: 50 - 999
  • Number of Sites: More than 10
  • Geographical Distribution: Low
  • Threat Containment: Easy
  • Removal: Moderate


  • Damage Level: Medium


  • Distribution Level: High
Writeup By: Yana Liu

Search Threats

Search by name
Example: W32.Beagle.AG@mm
STAR Antimalware Protection Technologies
Internet Security Threat Report