1st you need to download fresh python for Windows -> Python/Releases and install it

[ ! ] don't forget to check (include to PATH) option in checkbox, then open cmd (Win+R type cmd, Enter) and type:

pip install pyinstaller

after successful install, in your cmd type:

pyinstaller dumpPakKey.py -F 

[ ! ] make sure you are at the same directory where dumpPakKey.py is...

[ i ] switch directory in cmd.

cd \DirectoryName\dumpPakKey.py

after complition, check \Dist\ directory for your created *.exe to run your (created with PyInstaller) *.exe open cmd , cd to path where your *.exe is and type the following:

dumpPakKey.exe name_of_your_game-Shipping.exe

or just drag and drop your *.exe file on dumpPakKey.exe it will automatically create Crypto.json for you.

then in cmd run:

UnrealPak.exe name_of_your_game-WindowsNoEditor.pak -cryptokeys=Crypto.json

or use *.bat file

UnrealPakTool

Have fun!)

NOTICE: It was successfully tested in created (Shipping mode) projects in UE4 4.25.3

NOTICE: It was created "for science purposes only" in order to dump real life projects, you need to be shure they arent obfuscated by their loaders witch most of games have

NOTICE: Pattern used to find key section may change in other unreal engine build's, and you will need to manually change pattern, and rebuild *.py to *.exe