The most sensitive website that came under attack was the one operated by the Recruitment and Assessment Centre (RAC) of the DRDO (www.rac.gov.in/experts/Dz.in. The website was down for over 9 hours, which actually deals with the recruitment of scientists to the several laboratories. Because it was an “Algerian”, that makes the issue very sensitive for CBI. It is possible that Mirrors of hacked sites are available on Zone-H at the hackers could have attacked the website to get details.
Source: https://thehackernews.com/2012/10/indian-defence-organisation-drdo.html