You didnt go your homework enough. Come I spoon-feed you
There's only one bank in sg which accept Malaysian without sg address or if you are not working/studying sg.

Cost to maintain account varies from SGD3000-SGD0.00

But you need to be physically there to open account. No online opening account.

That's bank is DBS. But you need to open their DBS Vickers account. After that see what account they opened for you.

If it's a DBS multiplier you need to maintain sgd3k for 6 months.
If it's a DBS My account it cost sgd0.00 to maintain account.

If you get a DBS multiplier account, you can switch to DBS My account after 6 months via online.

Hope that helps.