JS.Gigger is a script virus that is written in JavaScript. It spreads itself through email, mIRC and network shared folder with read/write access.

It emails itself to all addresses in the Microsoft Outlook Address Book with the follo..

X97M.Bdoc2.A creates "AutoRun.xla" file in Xlstart folder and manipulates Save in the menu to run Auto_Save command.

It also disables the Macro command in Tool menu.  

This happens on systems with Chi..