script/frida-learn/dex_dump.py

# -*- coding:utf-8 -*-
import sys

__author__ = 'Snow'
import frida


src = """
    var dex_count = 0
    Interceptor.attach(
    Module.findExportByName(
        'libart.so',
        '_ZN3art7DexFile10OpenMemoryEPKhjRKNSt3__112basic_stringIcNS3_11char_traitsIcEENS3_9allocatorIcEEEEjPNS_6MemMapEPKNS_10OatDexFileEPS9_'
    ),
    {
        onEnter: function (args) {
            var begin = args[1]
            var address = parseInt(begin, 16) + 0x20
            var dex_size = Memory.readInt(ptr(address))
            dex_count++
            send('Dex' + dex_count + ' Size : ' + dex_size)
            var file = new File('/data/data/%s/classes' + (dex_count == 1 ? '' : dex_count) + '.dex', 'wb')
            file.write(Memory.readByteArray(begin, dex_size))
            file.flush()
            file.close()
        },
        onLeave: function (retval) {
        }
    }
);
"""
app = 'com.hytc.hxsg2.coolpad'

def on_message(message,data):
    if message["type"] == "send":
        print("[+] {}".format(message["payload"]))
    else:
        print("[-] {}".format(message))
dev = frida.get_remote_device()
pid = dev.spawn(app)
session = dev.attach(pid)
script = session.create_script(src % app)
script.on("message", on_message)
script.load()
dev.resume(app)
sys.stdin.read()