AFE is an open source project which aim is to demonstrate      the    existence of security holes in the popular mobile  operating system. It also shows that Android botnet is certainly possible.

Thanks to this framework, it is easy to create automated malware and botnets for Android Platform for your analysis
(which you can even use to check the effeciency of your Antivirus), find vulnerabilities (such as Leaking Content Providers, Insecure File Storage, Directory Traversal and many others), gain access to apps, use exploits, and
execute arbitrary commands on infected devices.