I have the following logs on my apache2.
61.157.96.193 - - [10/Aug/2016:12:09:47 +0200] "GET http://50.117.47.67:43530/?rands=_11744130666812773703498720 HTTP/1.1" 200 11359 "-" "Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.1; WOW64; Trident/6.0)"
104.216.4.237 - - [02/Sep/2016:01:30:05 +0200] "GET http://104.216.4.237:8653/?rands=_130685931643406872390480 HTTP/1.1" 200 11359 "-" "Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.1; WOW64; Trident/6.0)"
This should return a 404 response?