Cybercrime - and ransomware in particular - is booming. Almost 70% of Australian businesses have suffered a ransomware attack in the last five years, up from 31% last year.

Darren Hopkins and Shane Bell, cyber partners at McGrathNicol Advisory, talk to Sean Aylmer about what happens behind the scenes during a cyber attack - and share the chilling audio of a ransomware demand left in a voicemail.

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