Take a bowl.
Place a sieve, whose diameter is the same as that of the bowl, on the bowl so that it rests on it.
Spread a muslin cloth on a sieve.
Pour yoghurt onto the muslin cloth. Slowly, the excess water in the yoghurt will pass through the muslin cloth and the sieve and collect in the bowl.
Tie a knot and hang the cloth so all the excess water drains out and collects in the bowl below. Leave it like that for an hour.
You will notice water dripping through the pores of the muslin cloth.
Then, place the knotted cloth on the sieve and rest the sieve on a bowl. Keep a heavy weight on the cloth and keep the setup in the fridge for 8-10 hours. This way, all the excess water that drips from the curd/yoghurt will collect in the bowl.
After 8-10 hours, remove the weight and open the knot. Inside, you will find thick, creamy hung curd/yoghurt.
Transfer it to a bowl with a lid. Cover and keep it in the fridge till further use.