This is MJ2 stock recovery. If you need it just flash with mobile odin or ABD :
ADB guide :
In our case, we need an image for the Samsung Galaxy S3 AT&T. Telus, Rogers, Bell, and SaskTel phones are (almost*) the exact same phone as AT&T, if you have one of these devices, you will be installing the AT&T recovery.
Now, transfer the ".img" file you downloaded onto your device. I'd suggest somewhere with a nice short path, like "/sdcard/<file>.img" (you'll thank me later, especially if you're using terminal emulator on the device)
Now, let's back up your existing recovery. If things go wrong, you can use this backup to get back to where you started.
# dd if=/dev/block/mmcblk0p18 of=/sdcard/recovery-backup.img
That should have created a "recovery-backup.img" on your phone's internal storage.
Here's the part you've been waiting for: Flashing the new image, which installs it as your recovery system. You do this from either an ADB shell or inside Terminal Emulator.
# dd if=/sdcard/<file>.img of=/dev/block/mmcblk0p18
You're done. Reboot into your new recovery by holding VolUp and Home while you power on your device.
Remember to enable USB Debugging in Developer options if you are using ADB method.