The incident occurred when she was waiting to board the suburban train for work in Mahindra Tech City.
The victim, identified as 24-year-old Swathi, was a resident of South Gangai Street, Choolaimedu.
It was a daily routine for Swathi to take sub-urban train from Nungambakkam railway station to Mahindra Tech City.
She was attacked minutes after her father Sreenivasan, a retired central government employee, had dropped her at the station.
The police have started the investigation and are in touch with her friends and relatives.