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Risk Level 1: Very Low

February 27, 2001
February 13, 2007 11:59:47 AM

VBS.JongBoy@mm is a worm that can spread using the popular chat program mIRC and through Microsoft Outlook. VBS.JongBoy@mm deletes the Regedit.exe file and attempts to overwrite several other system files.

VBS.JongBoy@mm is, like many other worms, written in the Visual Basic Scripting (VBS) language. Due to the fact that many worms are written in the Visual Basic scripting language, SARC offers a tool to disable the Windows Scripting Host.

NOTE: Definitions dated prior to 27 February detect this worm as Bloodhound.VBS.Worm.

Antivirus Protection Dates

  • Initial Rapid Release version February 27, 2001
  • Latest Rapid Release version September 28, 2010 revision 054
  • Initial Daily Certified version February 27, 2001
  • Latest Daily Certified version September 28, 2010 revision 036
  • Initial Weekly Certified release date pending
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.

Threat Assessment


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


  • Damage Level: Medium


  • Distribution Level: Medium
Note: On May 14, 2015, modifications will be made to the threat write-ups to streamline the content. The Threat Assessment section will no longer be published as this section is no longer relevant to today's threat landscape. The Risk Level will continue to be the main threat risk assessment indicator.
Writeup By: Neal Hindocha

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