In reply to Raj K Jaiswal.

Hi Raj,
Thanks for the comment. My guess is that the attackers are either looking to conduct a Man-in-the-middle attack(http://en.wikipedia.org/wiki/Man-in-the-middle_attack), or they're looking to replace the legitimate website with a similar looking fake phishing site (http://en.wikipedia.org/wiki/Phishing)
Hope this helps,

Martin