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Mystalyon, posted Sun May 20, 2018 3:29 pm (35087)

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This is the first time I've run into something like this, and I have no idea what it is, it may be encrypted because it has no valid file header as far as I can see. When using hex editor or notepad "g]]M" is in place of "UnityWeb".

Since this is the first time I've run into this, I'm not sure where to start in way of decrypting the files, if that's the problem. I'm pretty sure it's a Unity3D file, some of the other files with it are plain and work right off the bat.

I have very little idea of what I'm doing with this, so any help or insight would be appreciated.

Dropbox link to file: https://dl.dropboxusercontent.com/s/p1v ... ity3d?dl=0

aluigi, posted Sun May 20, 2018 5:00 pm (35098)

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what is "acgar"?

Mystalyon, posted Sun May 20, 2018 5:03 pm (35101)

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aluigi wrote:

what is "acgar"?

It's a company that makes AR/VR games for android and ios, since most of their games use unity3d files that are this way, I'm generalizing them into one category under their name.

aluigi, posted Sun May 20, 2018 5:08 pm (35102)

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acgar doesn't exist on any search engine.
Let's try again, what's the name of the company or of one of these games?

Mystalyon, posted Sun May 20, 2018 5:12 pm (35104)

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aluigi wrote:

acgar doesn't exist on any search engine.
Let's try again, what's the name of the company or of one of these games?

It's Chinese, but here's a link to their website and their games.

http://www.acgvr.com/wap/download

My bad, it's VR not AR

aluigi, posted Sun May 20, 2018 5:18 pm (35106)

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damn typo
The files are compressed with lzma.
Try this script and if you get any error or the decompressed file is smaller than the original, then upload another bigger sample:
http://aluigi.org/bms/acgvr.bms

Mystalyon, posted Sun May 20, 2018 5:18 pm (35107)

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aluigi wrote:

damn typo
The files are compressed with lzma.
Try this script and if you get any error or the decompressed file is smaller than the original, then upload another bigger sample:
http://aluigi.org/bms/acgvr.bms

I'll try it out, thank you very much!

Mystalyon, posted Sun May 20, 2018 5:46 pm (35111)

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aluigi wrote:

damn typo
The files are compressed with lzma.
Try this script and if you get any error or the decompressed file is smaller than the original, then upload another bigger sample:
http://aluigi.org/bms/acgvr.bms

UABE and Unity Studio don't recognize it. It has a CAB number and everything, so I believe it decompressed just fine.

Here's the largest file it has, which is in a format called .lucky, some of the .lucky files are straight up Unity3D files, so I'm assuming they all are, but I'm not sure.


https://dl.dropboxusercontent.com/s/gel ... lucky?dl=0

aluigi, posted Sun May 20, 2018 6:02 pm (35112)

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Decompression is correct.
Unfortunately I can't help you with the loading of the files, maybe try a different software (but it seems you already tried the best of them): viewtopic.php?f=17&t=12

Mystalyon, posted Sun May 20, 2018 7:19 pm (35115)

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aluigi wrote:

Decompression is correct.
Unfortunately I can't help you with the loading of the files, maybe try a different software (but it seems you already tried the best of them): viewtopic.php?f=17&t=12

Can't get anything to work so far, is there somewhere I can ask people who know about this kinda stuff and may be willing to help?

Thank you, by the way.

aluigi, posted Sun May 20, 2018 7:39 pm (35116)

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You can try to make a post in the topic I linked and upload also the decompressed file there.
Maybe you are lucky and someone with more information can give you some tips.

chrrox, posted Mon May 21, 2018 10:06 pm (35169)

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just xor the first 0x20 bytes with 2349fa6bed87588c6b4ff0f18cd9e320
and it becomes a normal unity-web that any unity tool can open like unity studio.

aluigi, posted Mon May 21, 2018 10:16 pm (35170)

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chrrox is right, script 0.2
Well done

Mystalyon, posted Wed May 23, 2018 9:27 pm (35222)

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chrrox wrote:

just xor the first 0x20 bytes with 2349fa6bed87588c6b4ff0f18cd9e320
and it becomes a normal unity-web that any unity tool can open like unity studio.

You're a savior of my sanity.

ailephi, posted Sat May 26, 2018 8:25 am (35270)

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I need some clarifications please,

I used the script 0.2 on one of the .lucky files but it didnt extract anything, but it changed the first 0x04 bytes from g]]M to oUUE instead

Where should I use the script, or does the script currently not work for all of the .lucky files?

chrrox, posted Sat May 26, 2018 3:19 pm (35275)

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the xor key is always 2349fa6bed87588c6b4ff0f18cd9e320

aluigi, posted Sat May 26, 2018 6:20 pm (35283)

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the script loads the key from the end of the file and it worked correctly with all the provided samples.
if a sample doesn't work then upload it.

chrrox, posted Sat May 26, 2018 9:02 pm (35292)

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Here are all the files just pick any.

aluigi, posted Sat May 26, 2018 11:36 pm (35294)

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???

chrrox, posted Sun May 27, 2018 12:51 am (35298)

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sorry wrong file.

ailephi, posted Sun May 27, 2018 2:11 am (35299)

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Here's two of the files that I've tried using the script on

http://www.mediafire.com/file/zg75y68y7x6127p/acgvr.zip

ailephi, posted Sun May 27, 2018 5:41 am (35302)

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oops nevermind, finally found out why it didn't work

i've been extracting the wrong file

aluigi, posted Sun May 27, 2018 9:00 am (35309)

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You were right because these other samples (UnityFS) have a blank key at the end made just by 0x08 bytes.
Script 0.2.1

Eagle, posted Sun Jan 20, 2019 4:52 pm (42569)

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Hi there , so I'm still pretty new to ripping models, and i've been trying to use the script you've provided on some .lucky files but i don't seem to be getting any results?
Are there any specific steps to follow?

Here's one of the files i'm trying to use the script on http://www.mediafire.com/file/eudl1odbl ... lucky/file