Business urged to unite in cyber fight
![People stand around at a supermarket in the Ukraine unable to pay for their shopping due to Petya ransomware affecting ...](http://web.archive.org./web/20170710111239/http://www.afr.com/content/dam/images/g/x/0/e/p/d/image.related.afrIndexLead.320x210.gx0avs.png/1498641121364.jpg)
The Prime Minister's cyber security adviser has warned businesses face a fight against a rising tide of global cyber security threats, after Australian operations were caught up in the Petya ransomware attacks.