F-Secure recently released its quarterly report showing that malware trend has grown in terms of volume and sophistication from last year. It is hard to assess the nature of threats posed by malware but statistic by F-Secure shows a clear pattern, particularly for the popular malware target, Android.
In first quarter of 2011, 10 new Android malware families and their variants were discovered and a year later, the number has reached to 37 families. During the same period, the number of malicious APK files has also increased from 137 to 3,063. Excepting Symbian which recorded 12 malware families, no other mobile platforms were recorded with new malware during the quarter. It also shows how vulnerable Android is!
According to F-Secure, the growth in number is caused by malware authors who keep on distributing their malware in different application names. Malware attacks on Android are not only getting more common but malware authors are using more sophisticated ways to do this.
The most important technique that malware authors are using is to warp malicious codes with a popular app. By this method, users neither express doubt on software they download nor do they think twice for its legitimacy. The most recent example of this method is the fake Angry Birds Android app, which once installed, started to enlist your phone as part of a botnet server.
By this way malware authors leave no scope to let users guess that they have been victimized as there is less for them to detect.