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VBS.Krim.F@mm

Risk Level 1: Very Low

Discovered:
March 7, 2003
Updated:
February 13, 2007 11:43:54 AM
Also Known As:
Bloodhound.VBS.Worm, I-Worm.Zokrim [KAV], VBS/Vale@mm.gen [RAV]
Type:
Worm
Systems Affected:
Windows 2000, Windows 95, Windows 98, Windows Me, Windows NT, Windows XP


The VBS.Krim.F@mm worm is a variant of VBS.Krim@mm. This worm sends itself to all the contacts in the Microsoft Outlook Address Book.

When VBS.Krim.F@mm is run, one of the files that the worm created titled, Mhr.vbs, displays a message box.

The email may have the subject, "Mi ami ancora ???" or "Sto male senza di TE." The attachment is named amore.bat.

If VBS.Krim.F@mm finds that mIRC is installed on your computer, it replaces the mIRC Script.ini file with its own ini file. This modification causes the worm to spread over the IRC network. The worm also attempts to format the C drive, by adding a command to the Autoexec.bat file.

NOTE: Virus definitions dated prior to March 10, 2003 may detect this as Bloodhound.VBS.Worm.

Antivirus Protection Dates

  • Initial Rapid Release version March 9, 2003
  • Latest Rapid Release version September 28, 2010 revision 054
  • Initial Daily Certified version March 9, 2003
  • Latest Daily Certified version September 28, 2010 revision 036
  • Initial Weekly Certified release date March 9, 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: Moderate

Damage

  • Damage Level: Medium

Distribution

  • Distribution Level: High
Writeup By: Jari Kytojoki

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