There was no confusion, I searched my machine and delete that file.
But while I am on net I made that search.
We working from our server,
Let me tell you from the beginning
Our system was ok,
We received cad files related to a project
Automatically this lisp file created in the same path of the opened file when we open any file related to this project,
After that the infection attack the AutoCAD itself and this lisp created at the same path of opened file.
So I am search for a solution for that