An explosion in mobile malware during the last six months has more than doubled the chance that a user’s Android smartphone will become infected. The likelihood of an Android owner encountering malware has jumped by two-and-a-half times since January. The rogue app model — where attackers pirate a legitimate program, add malicious code and then re-release the app into the wild — will continue to be the biggest threat to Android users. An upgrade attack sidesteps the problem that hackers face when they release an infected app: The relatively small window of opportunity before their work is discovered and the app pulled.”]