Is WPA2(PKS) AES vulnerable to 4 way hand shake and brute force attack?
Yes. Both WPA-TKIP and WPA2-AES use the same 4-way handshake, and the same way of deriving the PTK from the PSK. AES does not affect this. To launch the brute-force attack on the PSK you only need to capture the 4-way handshake (including the nonces). This is also true for WPA2-AES-PSK.