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


Risk Level 2: Low

August 16, 2003
February 13, 2007 12:05:36 PM
Also Known As:
PE_DUMARU.A [Trend], Win32.Dumaru [Computer Associa, W32/Dumaru@MM [McAfee], W32/Dumaru-A [Sophos], I-Worm.Dumaru [Kaspersky]
Systems Affected:

W32.Dumaru@mm is a mass-mailing worm that drops an IRC Trojan onto an infected machine. The worm gathers email addresses from certain file types and uses its own SMTP engine to email itself.

The email has the following characteristics:

From: "Microsoft" <security@microsoft.com>
Subject: Use this patch immediately !
Dear friend , use this Internet Explorer patch now!
There are dangerous virus in the Internet now!
More than 500.000 already infected!
Attachment: patch.exe

The worm will also infect the exe files on NTFS partitions.

This threat is compressed with UPX.

Antivirus Protection Dates

  • Initial Rapid Release version August 18, 2003
  • Latest Rapid Release version August 8, 2016 revision 023
  • Initial Daily Certified version August 18, 2003
  • Latest Daily Certified version August 9, 2016 revision 001
  • Initial Weekly Certified release date August 18, 2003
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.
Writeup By: Yana Liu

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