Thailand's ousted prime minister, Yingluck Shinawatra, has hit back at her opponents with a lawsuit, after being pushed from office more than a year ago, impeached and barred from politics for five years.

Yingluck filed a criminal case Tuesday at Bangkok's Criminal Court to counter-sue the country's attorney-general over the handling of her prosecution in connection with a subsidy scheme for rice farmers, which ran up huge losses.

In her court filing, Yingluck said the attorney-general and others were guilty of negligence of duty and a concerted effort to damage her reputation.

Yingluck was Thailand's prime minister from 2011 until a controversial court decision forced her from office in May 2014, just a few days before the military staged a coup.