Mastermind behind uni cheating business hits back at journos

"Go to hell, Amy and Lisa".

Those are the six simple words posted on the website of the business helping students cheat at their exams and essays at Australian universities.

The blunt message appears to have been posted by Yingying Dho, the woman behind university cheating organisation MyMaster.

It apparently refers to Sydney Morning Herald journalists Amy McNeilage and Lisa Visentin, who investigated Ms Dho's operations.

Ms Dho had been silent since the Fairfax Media investigation came to light nine days ago, with the website having also been offline since the report emerged.

MyMaster made more than $160,000 this year alone from targeting international students anxious about their grades, according to receipts obtained by Fairfax Media.

The company, which began operating in 2012, was said to boast 100 graduate writers from some of Australia's top universities who take on the exam and assignment work.

Students had been paying as little as $80 for a 'pass' grade, with fees rising depending on urgency and the desired marks.