Dragon Nest custom encrypted .RFS archive

[Omnix]

Hello everyone! Can someone please help to make a quickbms code to unpack this? As I know it hooks a .dll. I was able to unpack it with help few years ago, but encryption was updated. There is a .zip with all files in folder and one .RFS inside of Data folder. Thank you! https://www.mediafire.com/file/a02phabzcdr9mq8/DN.zip/file

Edited February 3 by Omnix

[Omnix]

Hello again! Bumping a thread. Hope someone can help me out. Trying to do it myself with zero knowledge and chat-gpt - obviously nothing. Hope someone can help me please. Thank you again and Happy Valentines Day everyone. 

[ikskoks]

Hi. After reading your first post, not everything is clear to me. I would appreciate some more info on the topic:
 1. How did you unpack this archive before encryption was changed? Is there any tool/script for the old archive file? Can you link it?
 2. What do you mean by "it hooks a .dll"? You mean that there are some custom hooks created by some reverse engineer? Can you link that as well?
 3. What do you mean by "There is a .zip with all files in folder and one .RFS inside of Data folder"? I can see only one RFS file there, no ZIP is present.
 4. Is this game still available to play/debug? I saw it was released in 2010, so I'm just wondering.

[Omnix]

10 minutes ago, ikskoks said:

Hi. After reading your first post, not everything is clear to me. I would appreciate some more info on the topic:
 1. How did you unpack this archive before encryption was changed? Is there any tool/script for the old archive file? Can you link it?
 2. What do you mean by "it hooks a .dll"? You mean that there are some custom hooks created by some reverse engineer? Can you link that as well?
 3. What do you mean by "There is a .zip with all files in folder and one .RFS inside of Data folder"? I can see only one RFS file there, no ZIP is present.
 4. Is this game still available to play/debug? I saw it was released in 2010, so I'm just wondering.

Hello! Thank you for reply!
1) It's a private server based on official one from Dragon Nest game. I created a topic about 5 years ago and user named Ekey helped me. I'll put a link with whole thread about it, maybe it will be useful https://www.zenhax.com/viewtopic.php@t=13100.html. They changed the whole encryption system and file format and instead of .pak there is .rfs now.

2) On the thread I left above Ekey explains it. I dunno if it's still a thing in a new version, just thought it maybe will be useful to write about it as well. The game is pretty old and as much as I know private servers of this game making custom encryptions every time, but it's got decrypted because the game is old already. Back then as I know it it used XTEA and XOR keys. I still dunno how Ekey got it worked that fast. I was able to contact him few days ago and sadly he said that he doesn't have desire and time to help again with that.

3) Sorry for miswriting. I meant I uploaded a zip on mediafire that contains a game folder and one of these .rfs in Data folder. I didn't include others (there are 9 of these in general). Data0 and Data1 are about 120mb, while Data2-Data8 are about 2gb per file.

4) Yeah, this is a private server as I said and it's still playable. Official ones are still can be unpacked with QuickBMS script from 2011, while private servers are customly encrypting files with each update. I probably should tell why I need it - I just need to look into localization file to play on official server. This private one using a pretty good translation file and I wanted to make a mod to play with comfort on other server.

Thank you again for reply!