Threat Description



Category: Malware
Type: Worm
Platform: W32
Aliases: Dumaru.F, W32.Dumaru.F@mm


Dumaru.F is very similar to Dumaru.B with the following differences:

  • File infection routine has been removed
  • IRC backdoor component has been removed
  • Uses different email address to post the stolen data
  • The email address where is sends the stolen data is updatable through the TCP backdoor
  • FTP uploading of stolen data has been enabled. This feature was disabled in Dumaru.B. The FTP site it would use is inaccessible at this point.


Automatic action

Once detected, the F-Secure security product will automatically disinfect the suspect file by either deleting it or renaming it.

More scanning & removal options

More information on scanning or removal options is available in the documentation for your F-Secure security product on the Downloads section of our Home - Global site.

You may also refer to the Knowledge Base on the F-Secure Community site for more information.

Contact Support

For further assistance, F-Secure customers can request support online via the Request support or the Chat forms on our Home - Global site.

Technical Details

Detailed description of Dumaru.B is available at:


F-Secure Anti-Virus detects this worm variant with:

Detection Type: PC
Database: 2003-09-09_03

Technical Details:Gergely Erdelyi, 9th of September, 2003


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