India’s largest bank SBI leaked account data on millions of customers
Not just SBI,I bet every nationalized bank in India has pathetic security. 
I've worked with some of them & I will say that if you want to sleep peacefully don't keep your money in a nationalised Indian bank; unfortunately private banks are out of reach for majority of the population.Anyway, it's not that a criminal needs to target the banks for sensitive data when the govt has made it easy by giving a central depository of citizen data in the name of Aadhaar; for the ease of use -it is linked with bank accounts & mobile numbers as well!