124 lines
3.6 KiB
Python
124 lines
3.6 KiB
Python
import argparse
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import os
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import subprocess
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import time
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from pathlib import Path
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import frida # type: ignore
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from androguard.core.apk import get_apkid # type: ignore
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FRIDA_SCRIPT = Path(__file__).parent / "hook.js"
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# Define handler to event generated by the scripts
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def on_message(message, data):
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if message["type"] == "error":
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print(f"[error] {message['description']}")
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print(message["stack"])
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elif message["type"] == "send" and message["payload"]["type"] == "invoke":
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handle_invoke_data(message["payload"]["data"])
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elif message["type"] == "send" and message["payload"]["type"] == "class-new-inst":
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handle_class_new_inst_data(message["payload"]["data"])
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elif message["type"] == "send" and message["payload"]["type"] == "cnstr-new-isnt":
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handle_cnstr_new_inst_data(message["payload"]["data"])
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else:
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print("[on_message] message:", message)
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def get_ty(java_name: str) -> str:
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"""Return the android name from the java name of a class / type"""
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# TODO: array
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# TODO: scalar
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if java_name == "V": # tmp stub
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return "V"
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return f"L{java_name.replace('.', '/')};"
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def get_method_id(method_data) -> str:
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"""Get a method descriptor from the different elements collected from the methods."""
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name = method_data["name"]
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ret = get_ty(method_data["ret"])
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cls = get_ty(method_data["class"])
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args = "".join(map(get_ty, method_data["args"]))
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return f"{cls}->{name}({args}){ret}"
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def handle_invoke_data(data):
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method = get_method_id(data["method"])
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caller_method = "?" # get_method_id(data["caller_method"])
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addr = data["addr"]
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print("Method.Invoke:")
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print(f" called: {method}")
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print(f" by: {caller_method}")
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print(f" at: 0x{addr:08x}")
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def handle_class_new_inst_data(data):
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constructor = get_method_id(data["constructor"])
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caller_method = "?" # get_method_id(data["caller_method"])
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addr = data["addr"]
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print("Class.NewInstance:")
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print(f" called: {constructor}")
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print(f" by: {caller_method}")
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print(f" at: 0x{addr:08x}")
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def handle_cnstr_new_inst_data(data):
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constructor = get_method_id(data["constructor"])
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caller_method = "?" # get_method_id(data["caller_method"])
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addr = data["addr"]
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print("Constructor.newInstance:")
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print(f" called: {constructor}")
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print(f" by: {caller_method}")
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print(f" at: 0x{addr:08x}")
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def main():
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parser = argparse.ArgumentParser(
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prog="Android Theseus project",
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)
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parser.add_argument(
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"-a", "--apk", required=True, help="Target application", type=Path
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)
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parser.add_argument(
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"-s",
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"--device",
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default="",
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help="The android device to connect to, eg: 'emulator-5554'",
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type=str,
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)
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args = parser.parse_args()
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env = dict(os.environ)
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if args.device != "":
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device = frida.get_device(args.device)
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env["ANDROID_SERIAL"] = args.device
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else:
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device = frida.get_usb_device()
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app = get_apkid(args.apk)[0]
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if device.enumerate_applications([app]):
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# Uninstall the APK if it already exist
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subprocess.run(["adb", "uninstall", app], env=env)
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subprocess.run(["adb", "install", str(args.apk.absolute())], env=env)
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with FRIDA_SCRIPT.open("r") as file:
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script = file.read()
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pid = device.spawn([app])
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session = device.attach(pid)
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script = session.create_script(script)
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script.on(
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"message",
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on_message,
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)
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# Load script
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script.load()
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# Resume the execution of the APK
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device.resume(pid)
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print("Press ENTER to finish the analysis")
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input()
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