(1)First of all, extract the blink.apk by using 7zip.(2)Check the extracted files. I found classes.dex. (3)Get the dex2jar from following site. https://jaist.dl.sourceforge.net/project/dex2jar/dex2jar-2.0.zip (4)Convert classes.dex to jar …

Open thekey.pcapng by WireShark, I found the capture of USB inputs. Maybe it contains the capture data of USB device when make the flag.txt. Little guessing,,,the "most frequent input source" would be the input device which used to make th…