# Question: Mob psycho ### Key: picoCTF{ax8mC0RU6ve_NX85l4ax8mCl_52a5e2de} **Core concept: SHA256 Hash** We're given an APK file. Since they're essentially zip files, I unzipped it using `unzip mobpsycho.apk -d ayan` to unzip it in the custom directory ayan. Then, I run `eza -T` to get the tree of all the files in the directory. Running through them, I find a flag.txt. I navigate to the directory; /res/color/. I run `cat flag.txt` to get the flag. But it's a random string. I tried decoding it thriough a couple of cyphers, and found that it is hex. So, I ran `xxd -r -p flag.txt` to get the flag in hex. Voila! Found the flag! Output: picoCTF{ax8mC0RU6ve_NX85l4ax8mCl_52a5e2de}