An internet security watchdog is warning people carrying out financial transactions online that there has been a sudden surge in malware attacks.
Malware involves a person's device being taken over and fake invoices being sent to customers or a person's data being encrypted and held to ransom.
State cyber security agency CertNZ said there have been 1000 such attacks in the past two months.
Its deputy director, Declan Ingram, said the attacks from offshore are happening on a global scale.