Unreal Engine 4 pak-file Unpacker / unreal_tournament_4.bms [UE4 global topic]

[mositive]

Hello everyone, today i learned using bms and ueviewer. But i have a problem with loading uasset files. My umodel cannot open 3D models. Can anyone help me? Thanks in advance... Here's the screenshot of it:

[spiritovod]

@mositive: This topic is for quickbms scripts, so if you have questions about other tools, please address them to respective places. For example, there is a solution for this game in the game topic at gildor's forum.

[mositive]

@mositive: This topic is for quickbms scripts, so if you have questions about other tools, please address them to respective places. For example, there is a solution for this game in the game topic at gildor's forum.

Thanks brother. Sorry again for disturbing you.

[michalss]

Can anyone check stray game pls ?

[michalss]

In Stay game is used compression method Oodle: https://docs.unrealengine.com/4.27/en-U ... tion/Oodle . - do you have any idea please ? I never seen this before...

Never mind i got it extracted..

[Sruffy]

Hi there, I use latest version of Quick BMS along with a script for unpacking .pak files. I have attached the script as reference and below is the error that occurs while unpacking some of .pak files:

Can someone please help fixing this?

[DewiMorgan]

Never mind i got it extracted..

How?
(https://imgs.xkcd.com/comics/wisdom_of_the_ancients.png)

[spiritovod]

@Sruffy: Provide the package you have problems with. Though I will not be able to check it until I get home next week.

@DewiMorgan: Even though I can't check it by myself at the moment, people are reporting that the game is using default format for respective engine version, which means 4.27 script from my signature or any compatible tool (like umodel/fmodel) should work with the game without additional steps.

[Sruffy]

@Sruffy: Provide the package you have problems with. Though I will not be able to check it until I get home next week.

@DewiMorgan: Even though I can't check it by myself at the moment, people are reporting that the game is using default format for respective engine version, which means 4.27 script from my signature or any compatible tool (like umodel/fmodel) should work with the game without additional steps.

Heres the link to the pak file:

[Sruffy]

@Sruffy: Provide the package you have problems with. Though I will not be able to check it until I get home next week.

@DewiMorgan: Even though I can't check it by myself at the moment, people are reporting that the game is using default format for respective engine version, which means 4.27 script from my signature or any compatible tool (like umodel/fmodel) should work with the game without additional steps.

Apologies for the ping, wanted to check if you managed to download the file and have a look at it? Its completely fine if you havent, I can wait for sure.

[spiritovod]

@Sruffy: This looks like self-invented obfuscation from modders - first entry is corrupted on purpose, so the game will simply skip it, but most tools would be troubled while trying to extract it. You can use attached script or any common tools without batch extracting (both umodel and fmodel can process valid entries separately without any issue).

Update: Updated script now extract everything, including invalid data (which obviously can't be used).

[Sruffy]

@Sruffy: This looks like self-invented obfuscation from modders - first entry is corrupted on purpose, so the game will simply skip it, but most tools would be troubled while trying to extract it. You can use attached script or any common tools without batch extracting (both umodel and fmodel can process valid entries separately without any issue).

Thank you so very much for this, it actually worked. Would you mind sharing how could I achieve such kind of encryption while packing my pak files.

[spiritovod]

@Sruffy: It's out of scope of this topic. Besides, the same scheme may not work correctly in some cases and in different games.

[ardvent]

I am working on trying to extract Multiversus, I found the AES key and can view the models in UModel, but I'm looking for the config files, subtitles, etc.

Using the QuickBMS unreal_tournament_4_0.4.27c_paks_only.bms script I get the following error:

Code: Select all

Error: the requested amount of bytes to allocate is negative (0xfcf29114)

Last script line before the error or that produced the error:
  285 getdstring BASE_PATH NAMESZ TOC_FILE5
  coverage file 0     0%   25817486   4078076790 . offset 00000000
  coverage file -5    0%   4          25817376   . offset 00000004

AES Key: 0x419DFFC484F1CED86842DD4E6DD914F02E3E119725F556C4B9AA44432021A9AC

Smallest PAK attached

[spiritovod]

@ardvent: All works fine here with the provided package. Make sure you didn't accidentally corrupted the script (for example, by trying to embed key in a wrong way) or package itself.

[ardvent]

@ardvent: All works fine here with the provided package. Make sure you didn't accidentally corrupted the script (for example, by trying to embed key in a wrong way) or package itself.

Yeah, I think the issue is that I embedded the key wrong, what's the syntax for this?

Code: Select all

# set your AES_KEY here as text or C string ("\x11\x22...") or umodel hex (0x1122...)
set AES_KEY binary "0x419DFFC484F1CED86842DD4E6DD914F02E3E119725F556C4B9AA44432021A9AC"
putarray 10 -1 ""
math AES_KEY_IS_SET = 1

Edit: Additionally I can list the files, but trying to extract them or write the list to a text file freezes quickbms and nothing happens.

[spiritovod]

@ardvent: Actually this thing should be adjusted a long time ago. Please try updated script, embedding keys is now supported in more convenient way.

-------------------------------------------------------------------------------------------------

Base 4.25 and 4.27 scripts are updated, they can now handle embedded keys set via [set AES_KEY binary ""] option in both common hex (0xAABB...) and C string (\xAA\xBB...) forms - previously only C string representation worked correctly. Note that from now on you don't need to change other option (AES_KEY_IS_SET), it will be handled automatically.

Most scripts from specific scripts bundle will be updated in the same way in a few days.

[Sruffy]

@Sruffy: It's out of scope of this topic. Besides, the same scheme may not work correctly in some cases and in different games.

Firstly, thank you for all your help. I wanted to bring in your notice that the script you provided works pretty well for some pak files but there are some which still gives the same error. Can there be a generic script which would work for all such pak files?

[JackDev]

Hello everyone, I found a new Nexon game called Argent Twilight, requires AES KEY, thanks!

[spiritovod]

@Sruffy: I don't want to bother with it much, so I've updated the script in the post above to extract everything from such packages, including invalid data. Different people are using different obfuscations, which can't be properly combined in one script. It's up to you to find out invalid data among extracted assets.

@JackDev: Those requests belongs to the separate topic from my signature.