At least 5 Australian businesses affected by ransomware.

The number of Australian businesses reported to be affected by a global cyber attack has risen to five, as authorities continue investigations into the source of the so-called 'WannaCry' ransomware. Australia appears to have been sheltered from the worst of the attack, which knocked out the computer systems of hospitals, rail networks and schools in Europe. But experts are warning Windows users not to be complacent. The government says it's working with five affected companies. The minister in charge of cyber security, Dan Tehan, says it's an important reminder to keep software up to date. This feature reveals more details.

AAP Source: AAP