Manchester-based Charantoor Kultar Singh, 22, was arrested by officers from the North West Hub of the Police Central e-Crime Unit (PCeU) on April 30 over the suspected hacking.
He has now pleaded guilty to the charge of unauthorised access to a computer system and unauthorised impairment of a computer programme.
Singh, who appeared at the Liverpool Magistrates' Court yesterday, is due to sentenced on 20 August.
Singh admitted an offence under section two of the Computer Misuse Act 1990 – gaining unauthorised access to a computer with intent to commit fraud by false representation.
The PCeU North West Hub was set up in January by the Metropolitan Police and the Home Office to combat serious incidents of computer hacking and cyber crime within the North West.