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  3. W32.Beagle.AY@mm


Risk Level 2: Low

January 26, 2005
February 13, 2007 12:32:27 PM
Also Known As:
Win32.Bagle.AT [Computer Assoc, Bagle.AX [F-Secure], Email-Worm.Win32.Bagle.ax [Kas, W32/Bagle.bj@MM [McAfee], W32/Bagle-AY [Sophos], WORM_BAGLE.AY [Trend Micro]
Systems Affected:
Windows 2000, Windows 95, Windows 98, Windows Me, Windows NT, Windows Server 2003, Windows XP

W32.Beagle.AY@mm is a mass-mailing worm that also spreads through file-sharing networks. The email will have a variable subject and attachment name. The attachment will have a .com, .cpl, .exe, or .scr file extension.

Note: Virus definitions version 70126v (extended version 20050126.022) or greater are required to detect this threat.

Antivirus Protection Dates

  • Initial Rapid Release version January 26, 2005
  • Latest Rapid Release version January 26, 2005
  • Initial Daily Certified version January 26, 2005
  • Latest Daily Certified version January 26, 2005
  • Initial Weekly Certified release date January 26, 2005
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.

Threat Assessment


  • Wild Level: Medium
  • 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: John Park

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