James Henderson
Attackers have used encryption algorithms to lock files, which owners cannot access unless they pay a ransom.
Over 57,000 infections in 99 countries have been detected, with Russia, Ukraine and Taiwan being top targets, security software maker Avast said.
Key points:
- Over 57,000 infections in 99 countries have been detected
- Ransomware attacks happen every day in Australia, they just don't get reported, expert says
- UK doctors have turned away chemotherapy patients due to not being unable to access medical records