Hey Amit, Night treks are not allowed in and around bangalore. Skandagiri Sun rise trek is organized by many agencies and trekking clubs.
Basic Itinerary is: Pick up at few of the locations in bangalore by 11 and head to the base. Take permission from forest officials-costs around Rs 250.
Trek to the peak is allowed at around 3.00 AM
Reach the peak, witness sunrise, spend some time and descend to the base by around 9 AM or 10 AM and head to bangalore. Typically the cost should not be more than Rs1000(Max price) but i had seen feww agencies charging bit more and offering breakfast while return journey to bangalore. Wish you a happy and safe trek, cheers !!!!
I keep seeing packages for night trek so I guess it has started again. For early morning trek, you might need to start at 3-3:30 am as its a 1.5 hrs ride from Bangalore. You can check the night trek packages in Thrillophia