Patterns for decorating private methods of a class

In the below class I have a public method called ProcessMessage. This method is responsible for processing the incoming messages. Processing a message involves different stage. I want to decorate this class in such a way that I can publish performance counter values from each stage of the message processing.

I know I can override the ProcessMessage method and rewrite the logic once again with publishing performance counter values. But is there any better way / pattern which I can apply, so that I don’t have to duplicate the logic once again in the decorated class.

public class MessageProcessor
{

    public void ProcessMessage()
    {
        ConvertReceivedMessage();
        SendToThirdParty();
        ReceiveResponse();
        ConvertResponseMessage();
        SendResponseToClient();
    }

    private void ConvertReceivedMessage()
    {
        //here I want to publish the performance counter value from the decorated class
    }
    private void SendToThirdParty()
    {
         //here I want to publish the performance counter value from the decorated class

    }
    private void ReceiveResponse()
    {
         //here I want to publish the performance counter value from the decorated class

    }
    private void ConvertResponseMessage()
    {
         //here I want to publish the performance counter value from the decorated class

    }

    private void SendResponseToClient()
    {
         //here I want to publish the performance counter value from the decorated class

    }

}

Thanks.