Root Samsung Galaxy Star duos (GT- S5282)
Samsung galaxy star can be rooted easily with cydia impactor. Google "Cydia Impactor" and download(8 MB- wndows) the compatible version on your desktop.
Now install adb drivers, along with your phone drivers(don't need to do this if you use kies, it installs the drivers automatically)
Now enable USB Debugging from Developer options. connect your phone to your computer. Start impactor and select "# drop SuperSU su to /system/xbin/su" though the option is default if you don't find it select it from the drop down menu and click start.
It'll install the binaries into the "/system/xbin/su" folder.
Now go to play store and download a superuser app "supersuser" or "super su" this helps in managing the root permissions given to apps and update your su binary.
You have successfully rooted your phone, Enjoy.