hello serGb, welcome to chinaphonearena!
There are auto root tools here
[Only registered and activated users can see links Click here to register]
If you are on JB ROM, I suggest starting with Framaroot.
If on KitKat, start with iRoot.
If those fail, then proceed to trying the other tools.
If none of them work, build and install CWM using this process:
[Only registered and activated users can see links Click here to register]
Then root from recovery by installing SuperSU.zip from sd card. DL:
[Only registered and activated users can see links Click here to register]
If you run into any problems with the process, feel free to post in the thread.
good luck!
Oops. Sorry about the links, had a posting error and copy-pasted the trimmed links.
Thanks for the catch, @"WuddaWaste"