├── .gitmodules ├── LICENSE ├── README.md ├── dllhook ├── __init__.py ├── __main__.py ├── hooker.py └── main.py ├── example ├── alsong_skip_logging.py └── see_process.py └── setup.py /.gitmodules: -------------------------------------------------------------------------------- 1 | [submodule "dllhook/mayhem"] 2 | path = dllhook/mayhem 3 | url = https://github.com/zeroSteiner/mayhem.git 4 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. 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Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | dllhook 2 | === 3 | [![PyPI version](https://badge.fury.io/py/dllhook.svg)](https://badge.fury.io/py/dllhook) 4 | dllhook is a tool for hooking Windows x86 applications. This tools injects embedded Python interpreter (Python DLL) 5 | to the application and executes your script. And also this provides a convenient hooking library to use in your script. 6 | This tool uses `mayhem python_injector` as injector. 7 | See https://github.com/zeroSteiner/mayhem/blob/master/tools/python_injector.py 8 | When you clone this repository, you must also clone submodule `mayhem`. 9 | This tool is tested on Python 3.6-3.11. 10 | 11 | Installation 12 | === 13 | Make sure you use 32-bit version of Python. 14 | 15 | To install dllhook: 16 | ```shell 17 | pip install dllhook 18 | ``` 19 | 20 | Usage 21 | === 22 | * Write your python script to inject. 23 | ```python 24 | import ctypes 25 | import dllhook 26 | 27 | # @dllhook.hook_dll('Kernel32.dll', 0x00014510) also works 28 | @dllhook.hook_dll('Kernel32.dll', b'CreateProcessW') 29 | def see_process(arg1): 30 | if arg1 != 0: 31 | print(" ", ctypes.wstring_at(arg1)) 32 | ``` 33 | * Save it as a file. (e.g. `C:\Users\example\Desktop\see_process.py`) 34 | 35 | * Execute the module `dllhook` with the target program and your script as the arguments. 36 | ```shell 37 | python -mdllhook "C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroRd32.exe" C:\Users\example\Desktop\see_process.py 38 | ``` 39 | Console output: 40 | ```text 41 | [+] Opened a handle to pid: 24308 42 | [*] Found Python library at: C:\Users\example\AppData\Local\Programs\Python\Python36-32\python36.dll 43 | [*] Injecting Python into the process... 44 | [+] Loaded C:\Users\example\AppData\Local\Programs\Python\Python36-32\python36.dll with handle 0x69ee0000 45 | [*] Resolved addresses: 46 | - Py_InitializeEx: 0x6a061cc0 47 | - PyRun_SimpleString: 0x6a07b1c0 48 | [*] Initialized Python in the host process 49 | [*] Waiting for client to connect on \\.\pipe\mayhem 50 | [*] Client connected on named pipe 51 | target: 0x75ae4510 52 | invoke: 0x6c401df0 53 | callbacker: 0x6620fdc 54 | C:/Program Files (x86)/Adobe/Acrobat Reader DC/Reader/ARH.exe 55 | C:\Program Files (x86)\Common Files\Adobe\ARM\1.0\AdobeARM.exe 56 | ``` 57 | Author 58 | === 59 | [cosine0](https://github.com/cosine0) @github 60 | -------------------------------------------------------------------------------- /dllhook/__init__.py: -------------------------------------------------------------------------------- 1 | from .hooker import * 2 | -------------------------------------------------------------------------------- /dllhook/__main__.py: -------------------------------------------------------------------------------- 1 | from .main import main 2 | 3 | if __name__ == '__main__': 4 | main() 5 | -------------------------------------------------------------------------------- /dllhook/hooker.py: -------------------------------------------------------------------------------- 1 | from __future__ import unicode_literals 2 | 3 | import ctypes 4 | import ctypes.wintypes 5 | import functools 6 | import inspect 7 | import re 8 | import struct 9 | import time 10 | import types 11 | 12 | import capstone 13 | import cffi 14 | import six 15 | 16 | kernel32 = ctypes.windll.kernel32 17 | user32 = ctypes.windll.user32 18 | NULL = 0 19 | invoker_count = 0 20 | fetchable_general_registers = {'eax', 'ebx', 'ecx', 'edx', 'esi', 'edi'} 21 | fetchable_registers = {'eax', 'esp', 'ebp'} | fetchable_general_registers 22 | callbackers = [] # to prevent garbage collection 23 | 24 | 25 | def error_string(errno): 26 | buffer_pointer = ctypes.c_wchar_p() 27 | kernel32.FormatMessageW( 28 | 0x1300, # FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS 29 | NULL, 30 | errno, 31 | 0x0C00, # MAKELANG(LANG_USER_DEFAULT | SUBLANG_DEFAULT) 32 | ctypes.byref(buffer_pointer), 33 | 0, 34 | NULL 35 | ) 36 | 37 | if buffer_pointer.value is None: 38 | raise ValueError(f'Failed to get message for error number {errno}') 39 | as_string = ctypes.wstring_at(buffer_pointer) 40 | kernel32.LocalFree(buffer_pointer) 41 | return f'({errno:#x}) {as_string}' 42 | 43 | 44 | def get_last_error_string(): 45 | errno = kernel32.GetLastError() 46 | as_string = error_string(errno) 47 | return as_string 48 | 49 | 50 | def read_memory(address, size): 51 | PAGE_READWRITE = 0x4 52 | old_protect = ctypes.c_uint32() 53 | tmp = ctypes.c_uint32() 54 | kernel32.VirtualProtect(address, size, PAGE_READWRITE, ctypes.byref(old_protect)) 55 | result = (ctypes.c_char * size).from_address(address).raw 56 | kernel32.VirtualProtect(address, size, old_protect, ctypes.byref(tmp)) 57 | return result 58 | 59 | 60 | def write_memory(address, content): 61 | PAGE_READWRITE = 0x4 62 | old_protect = ctypes.c_uint32() 63 | tmp = ctypes.c_uint32() 64 | kernel32.VirtualProtect(address, len(content), PAGE_READWRITE, ctypes.byref(old_protect)) 65 | ctypes.memmove(address, ctypes.create_string_buffer(content), len(content)) 66 | kernel32.VirtualProtect(address, len(content), old_protect, ctypes.byref(tmp)) 67 | 68 | 69 | def install_jump(source, destination): 70 | absolute_jmp = b'\xE9' + struct.pack('= 5: 184 | break 185 | original_asm = '\n'.join(original_asm) 186 | 187 | target_head = target_head_long[:5] 188 | decorator_scope_vars['target_head'] = target_head 189 | 190 | invoker_c_code = f''' 191 | __declspec(naked) void invoker_{invoker_count}() 192 | {{ 193 | __asm 194 | {{ 195 | push ebp 196 | mov ebp, esp 197 | pushad 198 | {invoker_c_asm} 199 | mov eax, {callbacker_c_address:#x} 200 | call eax 201 | add esp, {4 * len(argspec.args):#x} 202 | popad 203 | pop ebp 204 | {original_asm} 205 | push {target_address + total_length:#x} 206 | ret 207 | }} 208 | }} 209 | int invoker_{invoker_count}_addr() 210 | {{ 211 | return (int)invoker_{invoker_count}; 212 | }} 213 | ''' 214 | 215 | # allocate callbacker_invoker_native using cffi 216 | ffi = cffi.FFI() 217 | ffi.cdef(f'void invoker_{invoker_count}();' 218 | f'int invoker_{invoker_count}_addr();') 219 | invoker_lib = ffi.verify(invoker_c_code) 220 | invoker_address = getattr(invoker_lib, 221 | f'invoker_{invoker_count}_addr')() 222 | decorator_scope_vars['invoker_address'] = invoker_address 223 | 224 | # install jumper to callbacker_invoker_native on target 225 | install_jump(target_address, invoker_address) 226 | invoker_count += 1 227 | print(f'target: {target_address:#x}') 228 | print(f'invoke: {invoker_address:#x}') 229 | print(f'callbacker: {callbacker_c_address:#x}') 230 | return callback # return original function, not wrapped 231 | 232 | return decorator 233 | -------------------------------------------------------------------------------- /dllhook/main.py: -------------------------------------------------------------------------------- 1 | import argparse 2 | import inspect 3 | import os 4 | import subprocess 5 | import sys 6 | import tempfile 7 | from pathlib import Path 8 | 9 | MAIN_DIR = Path(inspect.getframeinfo(inspect.currentframe()).filename).parent 10 | INTERPRETER_DIR = Path(sys.executable).parent 11 | 12 | injected_script = ''' 13 | import time 14 | {venv_setup} 15 | with open({script_path!r}) as f: 16 | exec(f.read()) 17 | 18 | while True: 19 | time.sleep(1) 20 | ''' 21 | 22 | 23 | def main(): 24 | parser = argparse.ArgumentParser( 25 | description='Execute target exe file and inject python script to it using dll injection.') 26 | parser.add_argument('exe', help='target exe file') 27 | parser.add_argument('python_script', help='python script file to inject') 28 | args = parser.parse_args() 29 | 30 | exe_path = args.exe 31 | script_path = os.path.abspath(args.python_script) 32 | pid = subprocess.Popen(exe_path).pid 33 | 34 | envs = os.environ.copy() 35 | 36 | if 'PATH' in os.environ: 37 | envs['PATH'] = os.path.pathsep.join([ 38 | r'C:\windows\syswow64', 39 | INTERPRETER_DIR.absolute().as_posix(), 40 | os.environ['PATH']]) 41 | else: 42 | envs['PATH'] = INTERPRETER_DIR.absolute().as_posix() 43 | 44 | if os.path.basename(INTERPRETER_DIR).lower() == 'scripts': 45 | # in venv 46 | library_path = INTERPRETER_DIR.parent / 'lib' / 'site-packages' 47 | venv_setup = f'import sys\nsys.path.append(' \ 48 | f'{library_path.absolute().as_posix()!r})' 49 | with open(INTERPRETER_DIR.parent / 'pyvenv.cfg') as f: 50 | for line in f: 51 | if line.startswith('base-prefix'): 52 | envs['PATH'] = os.path.pathsep.join([ 53 | line.split('=')[1].strip(), 54 | envs['PATH']]) 55 | break 56 | else: 57 | venv_setup = '' 58 | 59 | with tempfile.NamedTemporaryFile(suffix='.py', delete=False) as f: 60 | formatted_script = injected_script.format( 61 | working_dir=os.path.abspath(os.curdir), 62 | script_path=script_path, 63 | venv_setup=venv_setup).encode('utf_8') 64 | f.write(formatted_script) 65 | 66 | injector_path = Path(MAIN_DIR) / 'mayhem' / 'tools' / 'python_injector.py' 67 | subprocess.Popen([sys.executable, injector_path, f.name, str(pid)], 68 | env=envs).wait() 69 | os.unlink(f.name) 70 | -------------------------------------------------------------------------------- /example/alsong_skip_logging.py: -------------------------------------------------------------------------------- 1 | # you can download alsong at http://www.altools.co.kr/Download/ALSong.aspx 2 | # run: python -mdllhook "C:\Program Files (x86)\ESTsoft\ALSong\ALSong.exe" alsong_skip_logging.py 3 | from __future__ import print_function 4 | import datetime 5 | import dllhook 6 | import ctypes 7 | import sqlite3 8 | import os 9 | 10 | 11 | db_file = os.path.expanduser(r'~\Desktop\alsong_skip_log') 12 | cursor = None 13 | 14 | 15 | @dllhook.hook_dll(u'ALSongCommon.dll', b'?AudioPlay@CAudio@@QAEHUAUDIO_ITEM@@@Z') 16 | def play_hook(a1, a2, a3, a4, a5, a6): 17 | # arg6 == &file name (utf16-le, null-terminated) 18 | global cursor 19 | if cursor is None: 20 | cursor = sqlite3.connect(db_file, 21 | isolation_level=None).cursor() 22 | cursor.execute('CREATE TABLE IF NOT EXISTS alsong (time TEXT, action TEXT, name TEXT);') 23 | name = ctypes.wstring_at(a6) 24 | print(datetime.datetime.now().isoformat(), 'play', name) 25 | cursor.execute("INSERT INTO alsong (time, action, name) VALUES (current_timestamp, 'play', ?);", (name,)) 26 | 27 | 28 | @dllhook.hook_dll(u'ALSongCommon.dll', b'?AudioStop@CAudio@@QAEHXZ') 29 | def stop_hook(): 30 | global cursor 31 | if cursor is None: 32 | cursor = sqlite3.connect(db_file, 33 | isolation_level=None).cursor() 34 | cursor.execute('CREATE TABLE IF NOT EXISTS alsong (time TEXT, action TEXT, name TEXT);') 35 | print(datetime.datetime.now().isoformat(), 'stop') 36 | cursor.execute("insert into alsong (time, action) values (current_timestamp, 'stop');") 37 | 38 | 39 | @dllhook.hook_dll(u'ALSongCommon.dll', b'?AudioPause@CAudio@@QAEHXZ') 40 | def pause_hook(): 41 | global cursor 42 | if cursor is None: 43 | cursor = sqlite3.connect(db_file, 44 | isolation_level=None).cursor() 45 | cursor.execute('CREATE TABLE IF NOT EXISTS alsong (time TEXT, action TEXT, name TEXT);') 46 | print(datetime.datetime.now().isoformat(), 'pause') 47 | cursor.execute("INSERT INTO alsong (time, action) VALUES (current_timestamp, 'pause');") 48 | 49 | 50 | @dllhook.hook_dll(u'ALSongCommon.dll', b'?OnAudioResume@CAudio@@MAEXXZ') 51 | def resume_hook(): 52 | global cursor 53 | if cursor is None: 54 | cursor = sqlite3.connect(db_file, 55 | isolation_level=None).cursor() 56 | cursor.execute('CREATE TABLE IF NOT EXISTS alsong (time TEXT, action TEXT, name TEXT);') 57 | print(datetime.datetime.now().isoformat(), 'resume') 58 | cursor.execute("INSERT INTO alsong (time, action) VALUES (current_timestamp, 'resume');") 59 | -------------------------------------------------------------------------------- /example/see_process.py: -------------------------------------------------------------------------------- 1 | import ctypes 2 | import dllhook 3 | 4 | 5 | @dllhook.hook_dll('Kernel32.dll', b'CreateProcessW') 6 | def see_process(arg1): 7 | if arg1 != 0: 8 | print(ctypes.wstring_at(arg1)) 9 | -------------------------------------------------------------------------------- /setup.py: -------------------------------------------------------------------------------- 1 | import os 2 | from setuptools import setup, find_packages 3 | 4 | version = '0.1.2' 5 | package_name = "dllhook" 6 | package_description = """ 7 | Hook x86 dll or executable instruction with python script injecting embedded python interpreter. 8 | """.strip() 9 | 10 | packages = find_packages() 11 | install_requires = ['boltons', 'cffi', 'six', 'capstone'] 12 | 13 | 14 | def package_files(directory): 15 | paths = [] 16 | for (path, directories, filenames) in os.walk(directory): 17 | for filename in filenames: 18 | paths.append(os.path.join("..", path, filename)) 19 | return paths 20 | 21 | 22 | setup( 23 | name=package_name, 24 | version=version, 25 | description=package_description, 26 | packages=packages, 27 | package_data={'dllhook': package_files('dllhook/mayhem')}, 28 | license="GPLv3", 29 | author="Bumsu Hyeon", 30 | author_email="ksitht@gmail.com", 31 | install_requires=install_requires, 32 | classifiers=[ 33 | 'Topic :: Security', 34 | 'Environment :: Console', 35 | 'Operating System :: Microsoft :: Windows', 36 | 'License :: OSI Approved :: GNU General Public License v3 (GPLv3)', 37 | 'Programming Language :: Python', 38 | 'Intended Audience :: Developers' 39 | ], 40 | url='https://github.com/cosine0/dllhook' 41 | ) 42 | --------------------------------------------------------------------------------