Object Serialization Exploit
You can edit serialized binary files (e.g. user.dat) locally and push them back to the device.
Push back
adb push C:\Users\user\Desktop\user.dat /sdcard/Android/data/infosecadventures.allsafe/files/
adb push /home/user/Desktop/user.dat /sdcard/Android/data/infosecadventures.allsafe/files/