APP脱壳方法三

# Author: hluwa <hluwa888@gmail.com>
# HomePage: https://github.com/hluwa
# CreatedTime: 2020/1/7 20:57
import hashlib
import os
import random
import sys

try:
    from shutil import get_terminal_size as get_terminal_size
except:
    try:
        from backports.shutil_get_terminal_size import get_terminal_size as get_terminal_size
    except:
        pass

import click
import frida
import logging
import traceback

logging.basicConfig(level=logging.INFO,
                    format="%(asctime)s %(levelname)s %(message)s",
                    datefmt='%m-%d/%H:%M:%S')

banner = """
----------------------------------------------------------------------------------------
  ____________ ___________  ___        ______ _______   _______                         
  |  ___| ___ _   _|  _  / _        |  _    ___  / /  _                          
  | |_  | |_/ / | | | | | / /_ ______| | | | |__   V /| | | |_   _ _ __ ___  _ __    
  |  _| |    /  | | | | | |  _  |______| | | |  __| /   | | | | | | | '_ ` _ | '_    
  | |   | |  _| |_| |/ /| | | |      | |/ /| |___/ /^  |/ /| |_| | | | | | | |_) |  
  _|   _| _|___/|___/ _| |_/      |___/ ____//   /___/  __,_|_| |_| |_| .__/   
                                                                               | |      
                                                                               |_|      
                      https://github.com/hluwa/FRIDA-DEXDump                            
----------------------------------------------------------------------------------------
"""

md5 = lambda bs: hashlib.md5(bs).hexdigest()


def show_banner():
    try:
        if get_terminal_size().columns >= len(banner.splitlines()[1]):
            for line in banner.splitlines():
                click.secho(line, fg=random.choice(['bright_red', 'bright_green', 'bright_blue', 'cyan', 'magenta']))
    except:
        pass


def get_all_process(device, pkgname):
    return [process for process in device.enumerate_processes() if pkgname in process.name]


def search(api):
    """
    """

    matches = api.scandex()
    for info in matches:
        click.secho("[DEXDump] Found: DexAddr={}, DexSize={}"
                    .format(info['addr'], hex(info['size'])), fg='green')
    return matches


def dump(pkg_name, api, mds=None):
    """
    """
    if mds is None:
        mds = []
    matches = api.scandex()
    for info in matches:
        try:
            bs = api.memorydump(info['addr'], info['size'])
            md = md5(bs)
            if md in mds:
                click.secho("[DEXDump]: Skip duplicate dex {}<{}>".format(info['addr'], md), fg="blue")
                continue
            mds.append(md)
            if not os.path.exists("./" + pkg_name + "/"):
                os.mkdir("./" + pkg_name + "/")
            if bs[:4] != b"dexn":
                bs = b"dexn035x00" + bs[8:]
            with open(pkg_name + "/" + info['addr'] + ".dex", 'wb') as out:
                out.write(bs)
            click.secho("[DEXDump]: DexSize={}, DexMd5={}, SavePath={}/{}/{}.dex"
                        .format(hex(info['size']), md, os.getcwd(), pkg_name, info['addr']), fg='green')
        except Exception as e:
            click.secho("[Except] - {}: {}".format(e, info), bg='yellow')


def stop_other(pid, processes):
    try:
        for process in processes:
            if process.pid == pid:
                os.system("adb shell "su -c 'kill -18 {}'"".format(process.pid))
            else:
                os.system("adb shell "su -c 'kill -19 {}'"".format(process.pid))
    except:
        pass


def choose(pid=None, pkg=None, spawn=False, device=None):
    if pid is None and pkg is None:
        target = device.get_frontmost_application()
        return target.pid, target.identifier

    for process in device.enumerate_processes():
        if (pid and process.pid == pid) or (pkg and process.name == pkg):
            if not spawn:
                return process.pid, process.name
            else:
                pkg = process.name
                break

    if pkg and spawn and device:
        pid = device.spawn(pkg)
        device.resume(pid)
        return pid, pkg
    raise Exception("Cannot found <{}> process".format(pid))


if __name__ == "__main__":
    show_banner()

    try:
        device = frida.get_usb_device()
    except:
        device = frida.get_remote_device()

    if not device:
        click.secho("[Except] - Unable to connect to device.", bg='red')
        exit()

    pid = -1
    pname = ""
    try:
        pid, pname = choose(device=device)
    except Exception as e:
        click.secho("[Except] - Unable to inject into process: {} in n{}".format(e, traceback.format_tb(
            sys.exc_info()[2])[-1]), bg='red')
        exit()
    print(pname)
    processes = get_all_process(device, pname)

    mds = []
    for process in processes:
        logging.info("[DEXDump]: found target [{}] {}".format(process.pid, process.name))
        stop_other(process.pid, processes)
        session = device.attach(process.pid)
        path = os.path.dirname(sys.argv[0])
        path = path if path else "."
        script = session.create_script(open(path + "/agent.js").read())
        script.load()
        dump(pname, script.exports, mds=mds)
        script.unload()
        session.detach()
    exit()