A recently detected
Trojan can install an unwanted program module on
Android-powered mobile devices, which displays advertisement on top of the majority of launched programs.
The Trojan is called
Android.Spy.510 and it was detected by Doctor Web specialists. According to the security firm’s press release, the Trojan is distributed by cyber criminals as a modified and initially non-threat Anony Player media application.
But there is always options for protect your self from this
See here top 5 security apps At rooter15 blogSource :
itproportal ,
Rooter15 Blog