Here you can find rooted stock kernels (without any modifications, only "insecure" root added) for AT&T's USA version of Galaxy S III (SGH-I747).
This WILL rise your custom binary counter.
Insecure Means that adb daemon on phone is working as root. If you need more answers on what is insecure kernel, search over xda forums, the answer is there.
To flash, use latest ODIN (3.07) : Download Here!
*LATEST* - I747UCALEM
Instructions: - Run odin - unpack zip (you should see .tar file inside) - point to this TAR file in odin as PDA - click flash - done