As first thing let me tell you that some DRM apps will bother you if they detect that your device is rooted, that's the reason why it doesn't come rooted out of the box since we invested much time in having a great DRM support, anyway if you need root permissions for apps (remember that if you only need a root shell you can telnet to the ip or use adb over network that is enabled by default), follow these steps.
- Download CWM, unrar it and copy its recovery.img file to the root (main folder) of a FAT/FAT32 formatted MicroSD card
- Download SuperSU from Chainfire's website and copy the zip (don't unzip it) to the same folder where you have copied the recovery.img above
- Insert this MicroSD card in the WeTek Core and reboot to recovery by long pressing power button -> reboot -> recovery
- Once booted to CWM select: install zip -> choose zip from /sdcard -> and select the SuperSU zip
- When it's done you can reboot, just remember in case of an OTA update to remove CWM's recovery.img from the MicroSD card or it won't install the update
After re-rooting would be required after a full Firmware reflash...
