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VBS.Zeichen.A

Risk Level 1: Very Low

Discovered:
April 20, 2001
Updated:
February 13, 2007 11:52:09 AM
Type:
Trojan Horse

VBS.Zeichen.A is a Trojan horse written in Visual Basic Script (VBS). It pretends to be a script that obtains URLs to the sites with porno-related contents. When executed, it appends malicious commands to the C:\Autoexec.bat and shuts down Windows. After the computer is restarted, the commands that were added to the Autoexec.bat file perform a hidden format of drives C and D without prompting and without the ability to unformat. The malicious payload works only under Windows 95, 98, and Me.

Antivirus Protection Dates

  • Initial Rapid Release version April 20, 2001
  • Latest Rapid Release version September 28, 2010 revision 054
  • Initial Daily Certified version April 20, 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

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

Damage

  • Damage Level: Low

Distribution

  • Distribution Level: Low
Writeup By: Serghei Sevcenco

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