Extracting encrypted .pak file

[ツ]

C:\Users\Kajetan>"C:\Program Files\Epic Games\UE_5.0\Engine\Binaries\Win64\UnrealPak.exe" "C:\Program Files (x86)\Steam\steamapps\common\The Outlast Trials\OPP\Content\Pak\OPP-WindowsClient.pak" -extract "C:\Program Files (x86)\Steam\steamapps\common\The Outlast Trials\OPP\Content\Pak\A Files" -cryptokeys="C:\Program Files (x86)\Steam\steamapps\common\The Outlast Trials\OPP\Content\Pak\crypto.json"
LogPakFile: Display: Parsing crypto keys from a crypto key cache file
LogWindows: Error: === Critical error: ===
LogWindows: Error:
LogWindows: Error: Assertion failed: Key.Num() == sizeof(FAES::FAESKey::Key) [File:D:\build\++UE5\Sync\Engine\Source\Runtime\Core\Public\Misc\KeyChainUtilities.h] [Line: 144]
LogWindows: Error:
LogWindows: Error:
LogWindows: Error:
LogWindows: Error:


Tried to extract the game files today using UnrealPak (even found the aes-key), I'm either completely incompetent or they have changed the pak file format so nobody could access the files, which is unfortunate but also understandable. If anyone knows more like a workaround or something, I would highly appreciate it!

[Miles Upshur]

What is the Aes key?

[XaleX]

Originally posted by Miles Upshur:

What is the Aes key?

https://github.com/Cracko298/UE4-AES-Key-Extracting-Guide?tab=readme-ov-file

[LambdaWyset]

QuickBMS works