W32.Patoo@mm

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

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Notes:

• 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.

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

Protection

• Initial Rapid Release version September 15, 2003
• Latest Rapid Release version July 19, 2008 revision 019
• Initial Daily Certified version September 15, 2003
• Latest Daily Certified version January 20, 2009 revision 048
• Initial Weekly Certified release date September 17, 2003

Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.

Threat Assessment

Wild

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

Damage

• Damage Level: Medium

Distribution

• Distribution Level: High