Low threat Level,
Low damage capabilities,
Dangers:
Modifies win.ini file

Distinguishing charcteristics:
Subject: Windows update
Attachment: windows_update.txt.exe

This is a varient of the W32.Lohack.b.Worm which speads through KaZaA
and iMesh file-sharing networks

For more information see:
http://www.symantec.com/avcenter/venc/data/w32.lohack.c.worm.html