A Site is accessed by typing the URL inside a browser. The source code of most of those internet addresses is not properly written and is subjected to many holes exploit by cybercriminals. Cybercrooks often compromise a web page to install malwares that will control the attackee’s computer. Once the malware is properly installed , the hacker can either still information such as credit card numbers,Intellectual property, trade secret ,company’s secret or launch a Denial of service to prevent the authorized use of resources. I passed across the Google security Blog that gives detailed information on the meaning of hacking site and malware infection. Furthermore, the video illustrates how to use Google Master tool for running infection diagnosis on a web site.