As buildersmate states, this is a scam but its not concentrated on disclosing your bank details. The common theme here is that the applicant will also have to disclose an address to receive an advanced payment which is usually in the form of 3 x $1000 travellers cheques (forged). Some will make it past a bank cashier and be paid into your account where it may show a cleared balance for a short period of time which is when you will be instructed to withdraw say $2500 in cash / or send payment to the scammer only later to find out that original payment method was detected as fraudulent by the bank and cancelled.