An anonymous reader writes "Back in 2012, Android accounted for 79 percent of all mobile malware. Last year, that number ballooned even further to 97 percent. Both those data points come from security firm F-Secure, which today released its 40-page Threat Report for the second half of 2013. More specifically, Android malware rose from 238 threats in 2012 to 804 new families and variants in 2013. Apart from Symbian, F-Secure found no new threats for other mobile platforms last year."