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13 February 2007
Risk Impact:
Systems Affected:


Hacktool.Misoska is a program that performs a Denial of Service (DoS) attack against a specified computer.


Your Symantec program detects this threat as Hacktool.Misoska.


Hacktool.Misoska is distributed as a stand-alone executable file and must be manually run.

Antivirus Protection Dates

  • Initial Rapid Release version 02 October 2014 revision 022
  • Latest Rapid Release version 07 May 2019 revision 006
  • Initial Daily Certified version 26 February 2004
  • Latest Daily Certified version 07 May 2019 revision 008
  • Initial Weekly Certified release date 03 March 2004
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.

When Hacktool.Misoska is executed, it performs the following actions:
  1. Displays the following dialog box:

    that allows you to set the destination you want to attack, the size of data it sends, and the number of times it is sent.

  2. By clicking the "NUKE!" button, it sends the selected number of IGMP packets of the selected size.

The following instructions pertain to all Symantec antivirus products that support Security Risk detection.
  1. Update the definitions.
  2. Run a full system scan and delete all the files detected as Hacktool.Misoska.
For specific details on each of these steps, read the following instructions.

1. Updating the definitions
To obtain the most recent definitions, start your Symantec program and run LiveUpdate.

2. Scanning for and deleting the files
  1. Start your Symantec antivirus program, and then run a full system scan.
  2. If any files are detected as Hacktool.Misoska, click Delete.

    Note: If your Symantec antivirus product reports that it cannot delete a detected file, write down the path and file name. Then use Windows Explorer to locate and delete the file.