How to Change Magic Key of Pyinstaller Using BootLoader ?

[PremKumarMishra]

I am a user of Pyinstaller Since 3 years.I like pyinstaller most than any other exe makers Because of its simplicity.
But Recently I have figured out that Pyinstaller Executable can be unpacked by pyinextractor and pyc files can be decrypted by uncompyle6.So I wish i can change the magic key b'MEI\014\013\012\013\016' by making custom bootloader and changing some other stuffs.Then pyinextractor will not recognize it as Pyinstaller Archive. Please Reply What to Change.
Thanks in Advance.

[rokm]

While you could change the MAGIC string in both bootloader and python-based CArchive writer, I doubt that would offer you any extra "protection". I mean, if someone wanted to decompile your program, they could simply check the binary for the new magic value and adjust the pyiextractor (or the underyling pyinstaller) code to handle that as well...

(And by the way, PyInstaller comes with its own pyi-archive_viewer tool that allows extraction of data from the executable-embedded archive(s)...)

[PremKumarMishra]

Have you recompiled the bootloader, reinstalled PyInstaller, and rebuilt your program?
Changing the MAGIC in the indicated places works for me...

I only Compiled bootloader to exe and pasted in Bootloader/Windows32 and Windows64 folder
and saved the writers.py script

If it doesn't work, then you have a mismatch between bootloader and python code. It should be pretty easy to tell which one is mismatched, though, based on patterns in the .exe...

so how can i check what is mismatched. Any idea ?

Check the strings in the exe, which should contain two copies of your new MAGIC string. The first one should correspond to bootloader's code (i.e., the search pattern encoded in bootloader), and the second one (located towards (but not exactly at) the end of the file) should correspond to the one in CArchive that python code generated.

Thanks I will must check it.

[PremKumarMishra]

i did a look at pyminifier but only you can run encrypted py file by making pyz . Now how i will compile pyz file through Pyinstaller

That's only if you use its zlib compression feature. That won't provide any protection. I've just used:

pyminifier --nonlatin --replacement-length=10 -O -o mangled.py --obfuscate-builtins --obfuscate-import-methods tumult.py

to convert the example from pyminifier's page (called tumult.py) to mangled.py with all the obfuscation options enabled. You can just invoke PyInstaller on mangled.py which looks like:

#!/usr/bin/env python
𬒹𠴅俻𣝞𤎼𐠴𐪄𐬍𐪂㷦=ImportError
𬒹𠴅俻𣝞𤎼𐠴𐪄𐬍𐪂놛=print
𬒹𠴅俻𣝞𤎼𐠴𐪄𐬍𐪂ލ=False
𬒹𠴅俻𣝞𤎼𐠴𐪄𐬍𐪂ﹻ=object
try:
 import demiurgic
except 𬒹𠴅俻𣝞𤎼𐠴𐪄𐬍𐪂㷦:
 𬒹𠴅俻𣝞𤎼𐠴𐪄𐬍𐪂놛("Warning: You're not demiurgic. Actually, I think that's normal.")
try:
 import mystificate
except 𬒹𠴅俻𣝞𤎼𐠴𐪄𐬍𐪂㷦:
 𬒹𠴅俻𣝞𤎼𐠴𐪄𐬍𐪂놛("Warning: Dark voodoo may be unreliable.")
𬒹𠴅俻𣝞𤎼𐠴𐪄𐬍𐪂ﺄ=𬒹𠴅俻𣝞𤎼𐠴𐪄𐬍𐪂ލ 
class 𬒹𠴅俻𣝞𤎼𐠴𐪄𐬍𐪂ݰ(𬒹𠴅俻𣝞𤎼𐠴𐪄𐬍𐪂ﹻ):
 def __init__(self,*args,**kwargs):
  pass
 def 𬒹𠴅俻𣝞𤎼𐠴𐪄𐬍𐪂䤄(self,dactyl):
  𬒹𠴅俻𣝞𤎼𐠴𐪄𐬍𐪂ﮍ=demiurgic.palpitation(dactyl)
  𬒹𠴅俻𣝞𤎼𐠴𐪄𐬍𐪂ﲴ=mystificate.dark_voodoo(𬒹𠴅俻𣝞𤎼𐠴𐪄𐬍𐪂ﮍ)
  return 𬒹𠴅俻𣝞𤎼𐠴𐪄𐬍𐪂ﲴ
 def 𬒹𠴅俻𣝞𤎼𐠴𐪄𐬍𐪂䒂(self,whatever):
  𬒹𠴅俻𣝞𤎼𐠴𐪄𐬍𐪂놛(whatever)
if __name__=="__main__":
 𬒹𠴅俻𣝞𤎼𐠴𐪄𐬍𐪂놛("Forming...")
 𬒹𠴅俻𣝞𤎼𐠴𐪄𐬍𐪂ਝ=𬒹𠴅俻𣝞𤎼𐠴𐪄𐬍𐪂ݰ("epicaricacy","perseverate")
 𬒹𠴅俻𣝞𤎼𐠴𐪄𐬍𐪂ਝ.𬒹𠴅俻𣝞𤎼𐠴𐪄𐬍𐪂䒂("Codswallop")
# Created by pyminifier (https://github.com/liftoff/pyminifier)

Chances are you'll want to make a copy of all your code, then mangle every file in-place with the same name or your imports will get mixed up but I'll leave that to you.

Thanks For This Trick.

[PremKumarMishra]

Have you recompiled the bootloader, reinstalled PyInstaller, and rebuilt your program?

Changing the MAGIC in the indicated places works for me...

I know i marked question as answer but still i could not fix that .But here you said it works for you.
Can you please give me the bootloader files and writer.py you made for last time ?
Thanks For All Your Help.

[rokm]

Can you please give me the bootloader files and writer.py you made for last time ?

Here you go: https://github.com/rokm/pyinstaller/tree/modified-magic-example

[PremKumarMishra]

Can you please give me the bootloader files and writer.py you made for last time ?

Here you go: https://github.com/rokm/pyinstaller/tree/modified-magic-example

Thanks A Lot