The logo of Australia's TPG Telecom Ltd can be seen outside their head office in Sydney, Australia, April 12, 2017. REUTERS/David Gray/File Photo
(Reuters) -Australia's No. 2 telecom provider TPG Telecom Ltd said on Wednesday its cyber security adviser Mandiant notified the company of unauthorised access to an exchange service that hosts email accounts of up to 15,000 business customers.
The hack was an attempt to access customers' cryptocurrency and financial information, TPG said.
Earlier in October, Australia's largest telecoms firm Telstra Corp Ltd suffered a data breach, which exposed data of about 30,000 current and former employees dating back to 2017.
Cyber attacks against Australia from criminals and state-sponsored groups jumped last financial year, with a government report released in November equating the assault to one attack every seven minutes.
TPG said on Wednesday it had implemented measures to stop the unauthorised access and was contacting all customers on the exchange service affected by the incident.
The company's shares were down 2.4% at A$4.95.
(Reporting by Navya Mittal in Bengaluru; Editing by Shounak Dasgupta)
