APP逆向案例---xxapp
步骤一
抓个包
其中m_d,m_e为加密参数
步骤二（已经看了是360加固我们脱壳一下）
# 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"dex\n":
bs = b"dex\n035\x00" + 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()
步骤三(脱壳文件太多了我们合并一下dex)
#!/usr/bin/env python
# -*- coding: utf-8 -*-
# @Time : 2020/11/11 14:04
# @Author : ywy
import os, sys
path = r'C:\Users\xxx\Desktop\appHOOK\com.zuiai.hh'# 文件夹目录
files = os.listdir(path) # 得到文件夹下的所有文件名称
out_path =r'C:\Users\xxx\Desktop\appHOOK\22222' #输出文件夹
s = []
for file in files: # 遍历文件夹
if file.find("dex") > 0: ## 查找dex 文件
sh = f'jadx -j 1 -r -d {out_path} {path}\\{file}'
print(sh)
os.system(sh)
步骤四(找hook方法)
怎么找这个参数呢全局搜索关键字瞬间定位到这里
步骤五(开始hook)
1.py
# -*- coding: utf-8 -*-
import logging
import frida
import sys
#adb shell dumpsys window w |findstr \/ |findstr name= 查看运行包名的
logging.basicConfig(level=logging.DEBUG)
def on_message(message, data):
if message['type'] == 'send':
print("[*] {0}".format(message['payload']))
else:
print(message)
with open('hook.js', 'r', encoding='utf-8') as f:
sta = ''.join(f.readlines())
rdev = frida.get_remote_device()
session = rdev.attach("com.zuiai.hh") #app包名
print(session)
script = session.create_script(sta)
print(script)
def show(message,data):
print(message)
script.on("message",show)
# 加载脚本
script.load()
sys.stdin.read()
hook.js
Java.perform(function () {
var AA = Java.use("com.yuyh.library.nets.encryption.RSAUtils");
AA.encryptedDataOnJava.overload('java.lang.String', 'java.lang.String').implementation = function (args1, args2, args3, args4, args5, args6) {
console.log(args1)
console.log(args2)
var args = this.encryptedDataOnJava(args1,args2)
console.log("RSA-加出参--", args)
return args
}
AA.decryptDataOnJava.overload('java.lang.String', 'java.lang.String').implementation = function (args1, args2, args3, args4, args5, args6) {
console.log(args1)
console.log(args2)
var args = this.decryptDataOnJava(args1,args2)
console.log("RSA-解出参--", args)
return args
}
var BB = Java.use("com.yuyh.library.nets.encryption.AesEncryptUtil");
BB.encrypt.overload('java.lang.String', 'java.lang.String').implementation = function (args1, args2, args3, args4, args5, args6) {
console.log(args1)
console.log(args2)
var args = this.encrypt(args1,args2)
console.log("AES-加出参--", args)
return args
}
BB.decrypt.overload('java.lang.String', 'java.lang.String').implementation = function (args1, args2, args3, args4, args5, args6) {
console.log(args1)
console.log(args2)
var args = this.decrypt(args1,args2)
console.log("AES-解出参--", args)
return args
}
});
可以运行python代码,可以直接控制台运行frida -U com.zuiai.hh -l C:\Users\xxx\Desktop\appHOOK\hook.js
步骤六(运行看看效果)
步骤七(整理人家请求逻辑,python模拟)
这一步就没必要写了,很简单了,主要是给大家瞧瞧hook
