ZenHAX

hi there. I' trying to unpack the .npk files from a new Chinese game 'MOBA-Onmyoji', which is made by Netease, like 'Demon Seals' or other games.

I've tried the following script that take effect on 'Demon Seals'

http://aluigi.org/papers/bms/others/nxpk.bms

but it failed and logs here:

- signature of 4 bytes at offset 0x00000000 doesn't match the one
  expected by the script:

  this one: "EXPK"
  45 58 50 4b                                       EXPK

  expected: "NXPK"
  4e 58 50 4b                                       NXPK

I've also tried to change the file' header to 'NXPK', but it still doesnt work.

could anyone give me the right .bms file, or confirm that it cannot be unpacked by QuickBMS? Thanks a lot!


example .npk file: https://drive.google.com/open?id=1Xg7B3 ... 8OSUfEFURs

game' official site: http://moba.163.com/index.html

game download: https://g78.gdl.netease.com/jzpaj101.apk

你会不会unity

会一点。。。大佬可以稍微说说方案么，具体细节我自己回去查_(:3_/_)_

[del]在这里中文交流感觉好奇怪_(:3_/_)_[/del]

could anyone give me some info or ideas or suggestions...?

Well this game is not made by Unity, it is made by an self-developed engine called "NeoX" I guess. Meanwhile, since the signature has changed from "NXPK" to "EXPK", it is possible that netease has changed their packing method (slightly maybe?), making the unpack script not working any more. Also, changing the first four bytes won't make the script working again.

-Edit: A possible approach:
You could try to reverse "libclient.so" in the game's apk and see if you can find a Python bytecode called "redirect.pyc" which is used to "redirect"(?) the game resources. Here's one from Onmyoji on GitHub: https://github.com/YJBeetle/unnpk/commit/6bcfbdc2d97a3e0a774b8f00caa8638e8e0d7282 (Not tested).