Bad timing or bad steal attempt?

[WinBig]

About 130 players left in the Super Monday on Party with top 100 cashing. I'm not all that interested in stalling until the money. I have about 6000 and I have not been doing hardly any stealing as I was card cold but had just recently doubled up with QQ vs JJ. I am in ok shape relative to the blinds which if I recall correctly were 300/600.

It is folded to me in late position and I raise to 1700 and only the big blind calls. The big blind is one of the big stacks at the table and didn't appear to be playing a lot of hands.

Flop was 7 high rainbow and BB checked. I bet half the pot hoping to take it right there and was immediately raised to 3400. At this point my options are all-in or fold since calling does not accomplish anything. I fold after some deliberation and the BB shows pocket KK.

I think my preflop raise is ok since I need to steal some blinds to build my stack. A9 in late position with it folded to me is a pretty good spot for a steal in my opinion. I think I just got plain unlucky that the BB woke up with a monster hand.

Was I wrong to try and make this steal against one of the big stacks? Should I have bet the flop since it appeared to miss the caller even though I only had two overcards? I think the flop bet was ok and the BB just played the check-raise to perfection. The blinds ate me up pretty quickly after this hand and I got knocked out in 115th place.