Android Error:Execution failed for task ':app:transformClassesWithDexForDebug'. (Android.banker.A2af7 trojen detected) : Android studio showing this error :

Error:Execution failed for task ':app:transformClassesWithDexForDebug'.
> com.android.build.api.transform.TransformException: java.io.FileNotFoundException: C:\Users\hp\Desktop\M\app\build\intermediates\pre-dexed\debug\classes_b11ac8137589884ed512c93c59b969dc5dc99df3.jar (The system cannot find the file specified)

Every time i run the app, quick heal shows Android.banker.A2af7(PUP) tojen is detected and it quarantines the file.


Here is the screenshot :
  https://i.stack.imgur.com/ukqXo.png


I have no idea what is happening...  
Can someone help ?