Threat Description



Category: Malware
Type: Worm
Platform: VBS
Aliases: First, VBSV, WSV, Windows Scripting Virus, WSH, FWSV, Rabbit


VBS/First is the first virus to use Windows Scripting Host. This is a macro-like technique for Windows 98 and NT 5.0.

Windows Scripting Host macros come in files with VBS and JS extensions. You do not need any MS Office application or Internet Explorer in order to execute these macros - just double-clicking is enough to run them.

When VBS/First is executed, it will locate and infect other VBS macro files.


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

Two variants of the VBS/First virus will try to connect to Code Breakers website on the 15th of the month.

The virus is also shows a messagebox like this:

VBSv v2.0         by Lord Natas/CodeBreakers   

The VBS/First.C variant (VBSV2.0) is able to infect both VBS and .JS files

Description Details: Katrin Tocheva & Mikko Hypponen


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