Android.Answerbot is a Trojan horse that opens a back door on Android devices.
Android Package FileThe initial downloaded APK can vary as it will be named according to the legitimate application it is imitating.
The Trojan may also arrive as the following APK file:
[SINGLE CHARACTER].apk
Note: The file name changes as the version of the threat is updated, for example:
InstallationThis threat must be manually installed. It is known to be distributed through Chinese third-party Android markets by re-packaging legitimate applications with the Trojan code.

Click for a more detailed description of Rapid Release and Daily Certified virus definitions.