APP逆向案例xxapp[Python基础]
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
":
bs = b"dex
035x00" + 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
{}".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:UsersxxxDesktopappHOOKcom.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:UsersxxxDesktopappHOOK22222" #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)
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:UsersxxxDesktopappHOOKhook.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
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