NASA doesn't recruit students specifically from any IIT of India, not even from IISc Bangalore.

NASA Recruits astronauts, scientists, engineers, IT specialists, human resources specialists, accountants, writers, technicians and many other kinds of peoples.

Recruitment Process is different in NASA, if you are talented and extraordinary and good in research then you can make your Way to NASA from any reputed College of India whether it is IIT, NIT, IISc, IISER, BARC or Etc. At least you need to complete your Masters to get into NASA, PhD will be more better. Publish Good Research Papers in Relevant Field during your Research in famous Journals of World. you can visit on the official website of NASA for various Vacancies and you can apply accordingly.

All the Best