1. Symantec/
  2. Security Response/
  3. W32.Patoo@mm


Risk Level 2: Low

September 12, 2003
February 13, 2007 12:07:15 PM
Also Known As:
Systems Affected:

W32.Patoo@mm is a mass-mailing worm that attempts to use Microsoft Outlook to email itself to all the contacts in the Address Book.

The email has the following characteristics:
Subject: hey..
Attachment: Stop Messenger Popups

  • While the attachment name is displayed as Stop Messenger Popups, the attachment is actually the original filename of the worm (most likely Msngrblock.exe). This is accomplished by modifying the label of the attachment to deceive the recipient.
  • Virus definitions dated prior to September 15, 2003 may detect this threat as Bloodhound.W32.5.

W32.Patoo@mm is written in Microsoft Visual Basic.

Antivirus Protection Dates

  • Initial Rapid Release version September 15, 2003
  • Latest Rapid Release version September 28, 2010 revision 054
  • Initial Daily Certified version September 15, 2003
  • Latest Daily Certified version September 28, 2010 revision 036
  • Initial Weekly Certified release date September 17, 2003
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.
Writeup By: Scott Gettis

Search Threats

Search by name
Example: W32.Beagle.AG@mm
STAR Antimalware Protection Technologies
2016 Internet Security Threat Report, Volume 21
  • Twitter
  • Facebook
  • LinkedIn
  • Google+
  • YouTube