In 2012, malware increased by its highest margin in the past four years, with emerging threats such as mobile 'drive-by downloads', Twitter-driven botnets and an explosion in Android malware all helping to bolster malicious activity. In the following infographic, security vendor ZoneAlarm takes a look at the ways in which malware are infecting us -- most involve common computing tasks that you probably performed today.
Malware picture from Shutterstock
As you'd expect from a vendor-produced document, the below infographic gets a bit preachy towards the end, but it still throws up some interesting facts and statistics -- especially if you don't have any virus protection on your computer at all (in which case you've probably stumbled onto the wrong website).
All of the supplied costings are in US dollars, but you can probably chuck 10-20 percent on top to get a rough Australian estimate.