1326 lines
41 KiB
Markdown
1326 lines
41 KiB
Markdown
 & also output examples
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## Table of Contents
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<details>
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<summary>Native</summary>
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* [`Intercept open`](#intercept-open)
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* [`Execute shell command`](#execute-shell-command)
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* [`List modules`](#list-modules)
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* [`Log SQLite query`](#log-sqlite-query)
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* [`Reveal manually registered native symbols`](#reveal-native-methods)
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* [`Log method arguments`](#log-method-arguments)
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* [`Intercept entire module`](#intercept-entire-module)
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</details>
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<details>
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<summary>Android</summary>
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* [`Enumerate loaded classes`](#enumerate-loaded-classes)
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* [`Class description`](#class-description)
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* [`Turn WiFi off`](#turn-wifi-off)
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* [`Get IMEI`](#get-imei)
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* [`Hook io InputStream`](#hook-io-inputstream)
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* [`Android make Toast`](#android-make-toast)
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* [`Await for specific module to load`](#await-for-condition)
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* [`Webview URLS`](#webview-urls)
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* [`Print all runtime strings & stacktrace`](#print-runtime-strings)
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* [`String comparison`](#string-comparison)
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* [`Hook JNI by address`](#hook-jni-by-address)
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* [`Hook constructor`](#hook-constructor)
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* [`Hook Java reflection`](#hook-refelaction)
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* [`Trace class`](#trace-class)
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* [`Hooking Unity3d`](https://github.com/iddoeldor/mplus)
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* [`Get Android ID`](#get-android-id)
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</details>
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<details>
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<summary>iOS</summary>
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* [`iOS alert box`](#ios-alert-box)
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* [`File access`](#file-access)
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* [`Observe class`](#observe-class)
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* [`Find application UUID`](#find-application-uuid)
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* [`Extract cookies`](#extract-cookies)
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* [`Describe class members`](#describe-class-members)
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* [`Class hierarchy`](#class-hierarchy)
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* [`Hook refelaction`](#hook-refelaction)
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</details>
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<details>
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<summary>Windows</summary>
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</details>
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<hr />
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#### Intercept Open
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An example for intercepting `libc#open` & logging backtrace if specific file was opened.
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```js
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Interceptor.attach(Module.findExportByName("/system/lib/libc.so", "open"), {
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onEnter: function(args) {
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// debug only the intended calls
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this.flag = false;
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var filename = Memory.readCString(ptr(args[0]));
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if (filename.indexOf("something") != -1) {
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this.flag = true;
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var backtrace = Thread.backtrace(this.context, Backtracer.ACCURATE).map(DebugSymbol.fromAddress).join("\n\t");
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console.log("file name [ " + Memory.readCString(ptr(args[0])) + " ]\nBacktrace:" + backtrace);
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}
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},
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onLeave: function(retval) {
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if (this.flag) // passed from onEnter
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console.warn("\nretval: " + retval);
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}
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});
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```
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<details>
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<summary>Output example</summary>
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TODO
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</details>
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<br>[⬆ Back to top](#table-of-contents)
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#### Execute shell command
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```python
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import frida
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from frida_tools.application import Reactor
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import threading
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import click
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class Shell(object):
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def __init__(self, argv, env):
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self._stop_requested = threading.Event()
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self._reactor = Reactor(run_until_return=lambda reactor: self._stop_requested.wait())
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self._device = frida.get_usb_device()
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self._sessions = set()
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self._device.on("child-added", lambda child: self._reactor.schedule(lambda: self._on_child_added(child)))
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self._device.on("child-removed", lambda child: self._reactor.schedule(lambda: self._on_child_removed(child)))
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self._device.on("output", lambda pid, fd, data: self._reactor.schedule(lambda: self._on_output(pid, fd, data)))
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self.argv = argv
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self.env = env
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self.output = [] # stdout will pushed into array
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def exec(self):
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self._reactor.schedule(lambda: self._start())
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self._reactor.run()
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def _start(self):
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click.secho("✔ spawn(argv={})".format(self.argv), fg='green', dim=True)
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pid = self._device.spawn(self.argv, env=self.env, stdio='pipe')
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self._instrument(pid)
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def _stop_if_idle(self):
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if len(self._sessions) == 0:
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self._stop_requested.set()
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def _instrument(self, pid):
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click.secho("✔ attach(pid={})".format(pid), fg='green', dim=True)
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session = self._device.attach(pid)
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session.on("detached", lambda reason: self._reactor.schedule(lambda: self._on_detached(pid, session, reason)))
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click.secho("✔ enable_child_gating()", fg='green', dim=True)
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session.enable_child_gating()
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# print("✔ resume(pid={})".format(pid))
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self._device.resume(pid)
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self._sessions.add(session)
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def _on_child_added(self, child):
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click.secho("⚡ child_added: {}".format(child), fg='green', dim=True)
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self._instrument(child.pid)
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@staticmethod
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def _on_child_removed(child):
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click.secho("⚡ child_removed: {}".format(child), fg='green', dim=True)
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def _on_output(self, pid, fd, data):
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# print("⚡ output: pid={}, fd={}, data={}".format(pid, fd, repr(data)))
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# fd=0 (input) fd=1(stdout) fd=2(stderr)
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if fd != 2:
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self.output.append(data)
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def _on_detached(self, pid, session, reason):
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click.secho("⚡ detached: pid={}, reason='{}'".format(pid, reason), fg='green', dim=True)
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self._sessions.remove(session)
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self._reactor.schedule(self._stop_if_idle, delay=0.5)
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@staticmethod
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def _on_message(pid, message):
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click.secho("⚡ message: pid={}, payload={}".format(pid, message), fg='green', dim=True)
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```
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<details>
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<summary>Usage example</summary>
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List directory contents:
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```python
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def ls(folder):
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cmd = Shell(['/bin/sh', '-c', 'ls -la ' + folder], None)
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cmd.exec()
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for chunk in cmd.output:
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print(chunk.strip().decode())
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```
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Pull binary from iOS
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```python
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cmd = Shell(['/bin/sh', '-c', 'cat /System/Library/PrivateFrameworks/Example.framework/example'], None)
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cmd.exec()
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with open('/tmp/example', 'wb+') as f:
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f.writelines(cmd.output)
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# $ file /tmp/example
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# /tmp/example: Mach-O 64-bit 64-bit architecture=12 executable
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```
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</details>
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<br>[⬆ Back to top](#table-of-contents)
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#### List modules
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```js
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Process.enumerateModulesSync()
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.filter(function(m){ return m['path'].toLowerCase().indexOf('app') !=-1 ; })
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.forEach(function(m) {
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console.log(JSON.stringify(m, null, ' '));
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// to list exports use Module.enumerateExportsSync(m.name)
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});
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```
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<details>
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<summary>Output example</summary>
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TODO
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</details>
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<br>[⬆ Back to top](#table-of-contents)
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#### Log SQLite query
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```js
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Interceptor.attach(Module.findExportByName('libsqlite.so', 'sqlite3_prepare16_v2'), {
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onEnter: function(args) {
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console.log('DB: ' + Memory.readUtf16String(args[0]) + '\tSQL: ' + Memory.readUtf16String(args[1]));
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}
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});
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```
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<details>
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<summary>Output example</summary>
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TODO
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</details>
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<br>[⬆ Back to top](#table-of-contents)
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#### Reveal native methods
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`registerNativeMethods` can be used as anti reversing technique to the native .so libraries, e.g. hiding the symbols as much as possible, obfuscating the exported symbols and eventually adding some protection over the JNI bridge.
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[source](https://stackoverflow.com/questions/51811348/find-manually-registered-obfuscated-native-function-address)
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```js
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var fIntercepted = false;
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function revealNativeMethods() {
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if (fIntercepted === true) {
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return;
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}
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var jclassAddress2NameMap = {};
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var androidRunTimeSharedLibrary = "libart.so"; // may change between devices
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Module.enumerateSymbolsSync(androidRunTimeSharedLibrary).forEach(function(symbol){
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switch (symbol.name) {
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case "_ZN3art3JNI21RegisterNativeMethodsEP7_JNIEnvP7_jclassPK15JNINativeMethodib":
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/*
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$ c++filt "_ZN3art3JNI21RegisterNativeMethodsEP7_JNIEnvP7_jclassPK15JNINativeMethodib"
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art::JNI::RegisterNativeMethods(_JNIEnv*, _jclass*, JNINativeMethod const*, int, bool)
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*/
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var RegisterNativeMethodsPtr = symbol.address;
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console.log("RegisterNativeMethods is at " + RegisterNativeMethodsPtr);
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Interceptor.attach(RegisterNativeMethodsPtr, {
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onEnter: function(args) {
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var methodsPtr = ptr(args[2]);
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var methodCount = parseInt(args[3]);
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for (var i = 0; i < methodCount; i++) {
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var pSize = Process.pointerSize;
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/*
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https://android.googlesource.com/platform/libnativehelper/+/master/include_jni/jni.h#129
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typedef struct {
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const char* name;
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const char* signature;
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void* fnPtr;
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} JNINativeMethod;
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*/
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var structSize = pSize * 3; // JNINativeMethod contains 3 pointers
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var namePtr = Memory.readPointer(methodsPtr.add(i * structSize));
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var sigPtr = Memory.readPointer(methodsPtr.add(i * structSize + pSize));
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var fnPtrPtr = Memory.readPointer(methodsPtr.add(i * structSize + (pSize * 2)));
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// output schema: className#methodName(arguments)returnVal@address
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console.log(
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// package & class, replacing forward slash with dot for convenience
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jclassAddress2NameMap[args[0]].replace(/\//g, '.') +
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'#' + Memory.readCString(namePtr) + // method
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Memory.readCString(sigPtr) + // signature (arguments & return type)
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'@' + fnPtrPtr // C side address
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);
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}
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},
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onLeave: function (ignoredReturnValue) {}
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});
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break;
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case "_ZN3art3JNI9FindClassEP7_JNIEnvPKc": // art::JNI::FindClass
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Interceptor.attach(symbol.address, {
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onEnter: function(args) {
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if (args[1] != null) {
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jclassAddress2NameMap[args[0]] = Memory.readCString(args[1]);
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}
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},
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onLeave: function (ignoredReturnValue) {}
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});
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break;
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}
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});
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fIntercepted = true;
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}
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Java.perform(revealNativeMethods);
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```
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<details>
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<summary>Output example</summary>
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TODO
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</details>
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<br>[⬆ Back to top](#table-of-contents)
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#### Log method arguments
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```python
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def on_message(m, _data):
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if m['type'] == 'send':
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print(m['payload'])
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elif m['type'] == 'error':
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print(m)
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def switch(argument_key, idx):
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"""
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c/c++ variable type to javascript reader switch implementation
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# TODO handle other arguments, [long, longlong..]
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:param argument_key: variable type
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:param idx: index in symbols array
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:return: javascript to read the type of variable
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"""
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argument_key = argument_key.replace(' ', '')
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return '%d: %s' % (idx, {
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'int': 'args[%d].toInt32(),',
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'unsignedint': 'args[%d].toInt32(),',
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'std::string': 'Memory.readUtf8String(Memory.readPointer(args[%d])),',
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'bool': 'Boolean(args[%d]),'
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}[argument_key] % idx)
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def list_symbols_from_object_files(module_id):
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import subprocess
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return subprocess.getoutput('nm --demangle --dynamic %s' % module_id)
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def parse_nm_output(nm_stdout, symbols):
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for line in nm_stdout.splitlines():
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split = line.split()
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open_parenthesis_idx = line.find('(')
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raw_arguments = [] if open_parenthesis_idx == -1 else line[open_parenthesis_idx + 1:-1]
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if len(raw_arguments) > 0: # ignore methods without arguments
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raw_argument_list = raw_arguments.split(',')
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symbols.append({
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'address': split[0],
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'type': split[1], # @see Symbol Type Table
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'name': split[2][:split[2].find('(')], # method name
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'args': raw_argument_list
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})
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def get_js_script(method, module_id):
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js_script = """
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var moduleName = "{{moduleName}}", nativeFuncAddr = {{methodAddress}};
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Interceptor.attach(Module.findExportByName(null, "dlopen"), {
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onEnter: function(args) {
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this.lib = Memory.readUtf8String(args[0]);
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console.log("[*] dlopen called with: " + this.lib);
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},
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onLeave: function(retval) {
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if (this.lib.endsWith(moduleName)) {
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Interceptor.attach(Module.findBaseAddress(moduleName).add(nativeFuncAddr), {
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onEnter: function(args) {
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console.log("[*] hook invoked", JSON.stringify({{arguments}}, null, '\t'));
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}
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});
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}
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}
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});
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"""
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replace_map = {
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'{{moduleName}}': module_id,
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'{{methodAddress}}': '0x' + method['address'],
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'{{arguments}}': '{' + ''.join([switch(method['args'][i], i + 1) for i in range(len(method['args']))]) + '}'
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}
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for k, v in replace_map.items():
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js_script = js_script.replace(k, v)
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print('[+] JS Script:\n', js_script)
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return js_script
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def main(app_id, module_id, method):
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"""
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$ python3.x+ script.py --method SomeClass::someMethod --app com.company.app --module libfoo.so
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:param app_id: application identifier / bundle id
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:param module_id: shared object identifier / known suffix, will iterate loaded modules (@see dlopen)
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:param method: method/symbol name
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:return: hook native method and print arguments when invoked
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"""
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# TODO extract all app's modules via `adb shell -c 'ls -lR /data/app/' + app_if + '*' | grep "\.so"`
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nm_stdout = list_symbols_from_object_files(module_id)
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symbols = []
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parse_nm_output(nm_stdout, symbols)
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selection_idx = None
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for idx, symbol in enumerate(symbols):
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if method is None: # if --method flag is not passed
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print("%4d) %s (%d)" % (idx, symbol['name'], len(symbol['args'])))
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elif method == symbol['name']:
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selection_idx = idx
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break
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if selection_idx is None:
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if method is None:
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selection_idx = input("Enter symbol number: ")
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else:
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print('[+] Method not found, remove method flag to get list of methods to select from, `nm` stdout:')
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print(nm_stdout)
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exit(2)
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method = symbols[int(selection_idx)]
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print('[+] Selected method: %s' % method['name'])
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print('[+] Method arguments: %s' % method['args'])
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from frida import get_usb_device
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device = get_usb_device()
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pid = device.spawn([app_id])
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session = device.attach(pid)
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script = session.create_script(get_js_script(method, module_id))
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script.on('message', on_message)
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script.load()
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device.resume(app_id)
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# keep hook alive
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from sys import stdin
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stdin.read()
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if __name__ == '__main__':
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from argparse import ArgumentParser
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parser = ArgumentParser()
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parser.add_argument('--app', help='app identifier "com.company.app"')
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parser.add_argument('--module', help='loaded module name "libfoo.2.so"')
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parser.add_argument('--method', help='method name "SomeClass::someMethod", if empty it will print select-list')
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args = parser.parse_args()
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main(args.app, args.module, args.method)
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```
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<details>
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<summary>Symbol Type Table</summary>
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<pre>
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"A" The symbol's value is absolute, and will not be changed by further linking.
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"B" The symbol is in the uninitialized data section (known as BSS).
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"C" The symbol is common. Common symbols are uninitialized data.
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When linking, multiple common symbols may appear with the same name.
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If the symbol is defined anywhere, the common symbols are treated as undefined references.
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"D" The symbol is in the initialized data section.
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"G" The symbol is in an initialized data section for small objects.
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Some object file formats permit more efficient access to small data objects, such as a global int variable as
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opposed to a large global array.
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"I" The symbol is an indirect reference to another symbol.
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This is a GNU extension to the a.out object file format which is rarely used.
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"N" The symbol is a debugging symbol.
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"R" The symbol is in a read only data section.
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"S" The symbol is in an uninitialized data section for small objects.
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"T" The symbol is in the text (code) section.
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"U" The symbol is undefined.
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"V" The symbol is a weak object. When a weak defined symbol is linked with a normal defined symbol,
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the normal defined symbol is used with no error.
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When a weak undefined symbol is linked and the symbol is not defined, the value of the weak symbol becomes
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zero with no error.
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"W" The symbol is a weak symbol that has not been specifically tagged as a weak object symbol.
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When a weak defined symbol is linked with a normal defined symbol,
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the normal defined symbol is used with no error.
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When a weak undefined symbol is linked and the symbol is not defined, the value of the symbol is determined
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in a system-specific manner without error.
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On some systems, uppercase indicates that a default value has been specified.
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"-" The symbol is a stabs symbol in an a.out object file.
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In this case, the next values printed are the stabs other field, the stabs desc field, and the stab type.
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Stabs symbols are used to hold debugging information.
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"?" The symbol type is unknown, or object file format specific.
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</pre>
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</details>
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<br>[⬆ Back to top](#table-of-contents)
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#### Enumerate loaded classes
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And save to a file named `pkg.classes`
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```bash
|
|
$ frida -U com.pkg -qe 'Java.perform(function(){Java.enumerateLoadedClasses({"onMatch":function(c){console.log(c);}});});' -o pkg.classes
|
|
```
|
|
|
|
<details>
|
|
<summary>Output example</summary>
|
|
TODO
|
|
</details>
|
|
|
|
<br>[⬆ Back to top](#table-of-contents)
|
|
|
|
|
|
|
|
#### Class description
|
|
|
|
Get class methods & members.
|
|
|
|
```js
|
|
Object.getOwnPropertyNames(Java.use('com.company.CustomClass').__proto__).join('\n\t')
|
|
```
|
|
|
|
If there is a name collision, method & member has the same name, an underscore will be added to member. [source](https://github.com/frida/frida-java/pull/21)
|
|
```js
|
|
let fieldJsName = env.stringFromJni(fieldName);
|
|
while (jsMethods.hasOwnProperty(fieldJsName)) {
|
|
fieldJsName = '_' + fieldJsName;
|
|
}
|
|
```
|
|
|
|
<details>
|
|
<summary>Output example</summary>
|
|
TODO
|
|
</details>
|
|
|
|
<br>[⬆ Back to top](#table-of-contents)
|
|
|
|
#### Turn Wifi OFF
|
|
|
|
It will turn WiFi off on the creation of the first Acivity.
|
|
|
|
```js
|
|
var WifiManager = Java.use("android.net.wifi.WifiManager");
|
|
Java.use("android.app.Activity").onCreate.overload("android.os.Bundle").implementation = function(bundle) {
|
|
var wManager = Java.cast(this.getSystemService("wifi"), WifiManager);
|
|
console.log('isWifiEnabled ?', wManager.isWifiEnabled());
|
|
wManager.setWifiEnabled(false);
|
|
this.$init(bundle);
|
|
}
|
|
```
|
|
|
|
<details>
|
|
<summary>Output example</summary>
|
|
TODO
|
|
</details>
|
|
|
|
<br>[⬆ Back to top](#table-of-contents)
|
|
|
|
#### Get IMEI
|
|
|
|
Can also hook & change IMEI.
|
|
|
|
```js
|
|
function getIMEI(){
|
|
console.log('IMEI =', Java.use("android.telephony.TelephonyManager").$new().getDeviceId());
|
|
}
|
|
Java.perform(getIMEI)
|
|
```
|
|
|
|
<details>
|
|
<summary>Output example</summary>
|
|
TODO
|
|
</details>
|
|
|
|
<br>[⬆ Back to top](#table-of-contents)
|
|
|
|
#### Hook io InputStream
|
|
|
|
Hook `InputputStream` & print buffer as `ascii` with char limit & exclude list.
|
|
|
|
```js
|
|
function binaryToHexToAscii(array, readLimit) {
|
|
var result = [];
|
|
// read 100 bytes #performance
|
|
readLimit = readLimit || 100;
|
|
for (var i = 0; i < readLimit; ++i) {
|
|
result.push(String.fromCharCode( // hex2ascii part
|
|
parseInt(
|
|
('0' + (array[i] & 0xFF).toString(16)).slice(-2), // binary2hex part
|
|
16
|
|
)
|
|
));
|
|
}
|
|
return result.join('');
|
|
}
|
|
|
|
function hookInputStream() {
|
|
Java.use('java.io.InputStream')['read'].overload('[B').implementation = function(b) {
|
|
// execute original and save return value
|
|
var retval = this.read(b);
|
|
var resp = binaryToHexToAscii(b);
|
|
// conditions to not print garbage packets
|
|
var reExcludeList = new RegExp(['Mmm'/*, 'Ping' /*, ' Yo'*/].join('|'));
|
|
if ( ! reExcludeList.test(resp) ) {
|
|
console.log(resp);
|
|
}
|
|
var reIncludeList = new RegExp(['AAA', 'BBB', 'CCC'].join('|'));
|
|
if ( reIncludeList.test(resp) ) {
|
|
send( binaryToHexToAscii(b, 1200) );
|
|
}
|
|
return retval;
|
|
};
|
|
}
|
|
|
|
Java.perform(hookInputStream);
|
|
```
|
|
|
|
<details>
|
|
<summary>Output example</summary>
|
|
TODO
|
|
</details>
|
|
|
|
<br>[⬆ Back to top](#table-of-contents)
|
|
|
|
|
|
#### Android make Toast
|
|
|
|
```js
|
|
Java.scheduleOnMainThread(function() {
|
|
Java.use("android.widget.Toast")
|
|
.makeText(
|
|
Java.use("android.app.ActivityThread").currentApplication().getApplicationContext(),
|
|
"Text to Toast here",
|
|
0 // https://developer.android.com/reference/android/widget/Toast#LENGTH_LONG
|
|
)
|
|
.show();
|
|
});
|
|
```
|
|
|
|
<details>
|
|
<summary>Output example</summary>
|
|
TODO
|
|
</details>
|
|
<br>[⬆ Back to top](#table-of-contents)
|
|
|
|
#### Await for condition
|
|
Await until specific DLL will load in Unity app, can implement hot swap.
|
|
```javascript
|
|
var awaitForCondition = function(callback) {
|
|
var int = setInterval(function() {
|
|
if (Module.findExportByName(null, "mono_get_root_domain")) {
|
|
clearInterval(int);
|
|
callback();
|
|
return;
|
|
}
|
|
}, 0);
|
|
}
|
|
|
|
function hook() {
|
|
Interceptor.attach(Module.findExportByName(null, "mono_assembly_load_from_full"), {
|
|
onEnter: function(args) {
|
|
this._dll = Memory.readUtf8String(ptr(args[1]));
|
|
console.log('[*]', this._dll);
|
|
},
|
|
onLeave: function(retval) {
|
|
if (this._dll.endsWith("Assembly-CSharp.dll")) {
|
|
console.log(JSON.stringify({
|
|
retval: retval,
|
|
name: this._dll
|
|
}, null, 2));
|
|
}
|
|
}
|
|
});
|
|
}
|
|
Java.perform(awaitForCondition(hook));
|
|
```
|
|
|
|
<details>
|
|
<summary>Output example</summary>
|
|
TODO
|
|
</details>
|
|
|
|
<br>[⬆ Back to top](#table-of-contents)
|
|
|
|
|
|
#### Webview URLS
|
|
|
|
Log whenever WebView switch URL.
|
|
|
|
```js
|
|
Java.use("android.webkit.WebView").loadUrl.overload("java.lang.String").implementation = function (s) {
|
|
send(s.toString());
|
|
this.loadUrl.overload("java.lang.String").call(this, s);
|
|
};
|
|
```
|
|
|
|
<details>
|
|
<summary>Output example</summary>
|
|
TODO
|
|
</details>
|
|
|
|
<br>[⬆ Back to top](#table-of-contents)
|
|
|
|
#### Print runtime strings
|
|
|
|
Hoooking `toString` of StringBuilder/Buffer & printing stacktrace.
|
|
|
|
```js
|
|
Java.perform(function() {
|
|
['java.lang.StringBuilder', 'java.lang.StringBuffer'].forEach(function(clazz, i) {
|
|
console.log('[?] ' + i + ' = ' + clazz);
|
|
var func = 'toString';
|
|
Java.use(clazz)[func].implementation = function() {
|
|
var ret = this[func]();
|
|
if (ret.indexOf('') != -1) {
|
|
// print stacktrace if return value contains specific string
|
|
Java.perform(function() {
|
|
var jAndroidLog = Java.use("android.util.Log"), jException = Java.use("java.lang.Exception");
|
|
console.log( jAndroidLog.getStackTraceString( jException.$new() ) );
|
|
});
|
|
}
|
|
send('[' + i + '] ' + ret);
|
|
return ret;
|
|
}
|
|
});
|
|
});
|
|
```
|
|
|
|
<details>
|
|
<summary>Output example</summary>
|
|
TODO
|
|
</details>
|
|
|
|
<br>[⬆ Back to top](#table-of-contents)
|
|
|
|
#### String comparison
|
|
|
|
|
|
```js
|
|
Java.perform(function() {
|
|
var str = Java.use('java.lang.String'), objectClass = 'java.lang.Object';
|
|
str.equals.overload(objectClass).implementation = function(obj) {
|
|
var response = str.equals.overload(objectClass).call(this, obj);
|
|
if (obj) {
|
|
if (obj.toString().length > 5) {
|
|
send(str.toString.call(this) + ' == ' + obj.toString() + ' ? ' + response);
|
|
}
|
|
}
|
|
return response;
|
|
}
|
|
});
|
|
```
|
|
|
|
<details>
|
|
<summary>Output example</summary>
|
|
TODO
|
|
</details>
|
|
|
|
<br>[⬆ Back to top](#table-of-contents)
|
|
|
|
#### Hook JNI by address
|
|
|
|
Hook native method by module name and method address and print arguments.
|
|
|
|
```js
|
|
var moduleName = "libfoo.so";
|
|
var nativeFuncAddr = 0x1234; // $ nm --demangle --dynamic libfoo.so | grep "Class::method("
|
|
|
|
Interceptor.attach(Module.findExportByName(null, "dlopen"), {
|
|
onEnter: function(args) {
|
|
this.lib = Memory.readUtf8String(args[0]);
|
|
console.log("dlopen called with: " + this.lib);
|
|
},
|
|
onLeave: function(retval) {
|
|
if (this.lib.endsWith(moduleName)) {
|
|
console.log("ret: " + retval);
|
|
var baseAddr = Module.findBaseAddress(moduleName);
|
|
Interceptor.attach(baseAddr.add(nativeFuncAddr), {
|
|
onEnter: function(args) {
|
|
console.log("[-] hook invoked");
|
|
console.log(JSON.stringify({
|
|
a1: args[1].toInt32(),
|
|
a2: Memory.readUtf8String(Memory.readPointer(args[2])),
|
|
a3: Boolean(args[3])
|
|
}, null, '\t'));
|
|
}
|
|
});
|
|
}
|
|
}
|
|
});
|
|
```
|
|
|
|
<details>
|
|
<summary>Output example</summary>
|
|
TODO
|
|
</details>
|
|
|
|
<br>[⬆ Back to top](#table-of-contents)
|
|
|
|
#### Hook constructor
|
|
```js
|
|
Java.use('java.lang.StringBuilder').$init.overload('java.lang.String').implementation = function(stringArgument) {
|
|
console.log("c'tor");
|
|
return this.$init(stringArgument);
|
|
};
|
|
```
|
|
|
|
<details>
|
|
<summary>Output example</summary>
|
|
TODO
|
|
</details>
|
|
|
|
<br>[⬆ Back to top](#table-of-contents)
|
|
|
|
#### Hook reflection
|
|
|
|
`java.lang.reflect.Method#invoke(Object obj, Object... args, boolean bool)`
|
|
|
|
```javascript
|
|
Java.use('java.lang.reflect.Method').invoke.overload('java.lang.Object', '[Ljava.lang.Object;', 'boolean').implementation = function(a,b,c) {
|
|
console.log('hooked!', a, b, c);
|
|
return this.invoke(a,b,c);
|
|
};
|
|
```
|
|
|
|
<details>
|
|
<summary>Output example</summary>
|
|
TODO
|
|
</details>
|
|
|
|
<br>[⬆ Back to top](#table-of-contents)
|
|
|
|
#### Trace class
|
|
|
|
Tracing class method, with pretty colors and options to print as JSON & stacktrace.
|
|
|
|
TODO add trace for c'tor.
|
|
|
|
```js
|
|
|
|
var Color = {
|
|
RESET: "\x1b[39;49;00m", Black: "0;01", Blue: "4;01", Cyan: "6;01", Gray: "7;11", Green: "2;01", Purple: "5;01", Red: "1;01", Yellow: "3;01",
|
|
Light: {
|
|
Black: "0;11", Blue: "4;11", Cyan: "6;11", Gray: "7;01", Green: "2;11", Purple: "5;11", Red: "1;11", Yellow: "3;11"
|
|
}
|
|
};
|
|
|
|
/**
|
|
*
|
|
* @param input.
|
|
* If an object is passed it will print as json
|
|
* @param kwargs options map {
|
|
* -l level: string; log/warn/error
|
|
* -i indent: boolean; print JSON prettify
|
|
* -c color: @see ColorMap
|
|
* }
|
|
*/
|
|
var LOG = function (input, kwargs) {
|
|
kwargs = kwargs || {};
|
|
var logLevel = kwargs['l'] || 'log', colorPrefix = '\x1b[3', colorSuffix = 'm';
|
|
if (typeof input === 'object')
|
|
input = JSON.stringify(input, null, kwargs['i'] ? 2 : null);
|
|
if (kwargs['c'])
|
|
input = colorPrefix + kwargs['c'] + colorSuffix + input + Color.RESET;
|
|
console[logLevel](input);
|
|
};
|
|
|
|
var printBacktrace = function () {
|
|
Java.perform(function() {
|
|
var android_util_Log = Java.use('android.util.Log'), java_lang_Exception = Java.use('java.lang.Exception');
|
|
// getting stacktrace by throwing an exception
|
|
LOG(android_util_Log.getStackTraceString(java_lang_Exception.$new()), { c: Color.Gray });
|
|
});
|
|
};
|
|
|
|
function traceClass(targetClass) {
|
|
var hook;
|
|
try {
|
|
hook = Java.use(targetClass);
|
|
} catch (e) {
|
|
console.error("trace class failed", e);
|
|
return;
|
|
}
|
|
|
|
var methods = hook.class.getDeclaredMethods();
|
|
hook.$dispose();
|
|
|
|
var parsedMethods = [];
|
|
methods.forEach(function (method) {
|
|
var methodStr = method.toString();
|
|
var methodReplace = methodStr.replace(targetClass + ".", "TOKEN").match(/\sTOKEN(.*)\(/)[1];
|
|
parsedMethods.push(methodReplace);
|
|
});
|
|
|
|
uniqBy(parsedMethods, JSON.stringify).forEach(function (targetMethod) {
|
|
traceMethod(targetClass + '.' + targetMethod);
|
|
});
|
|
}
|
|
|
|
function traceMethod(targetClassMethod) {
|
|
var delim = targetClassMethod.lastIndexOf('.');
|
|
if (delim === -1)
|
|
return;
|
|
|
|
var targetClass = targetClassMethod.slice(0, delim);
|
|
var targetMethod = targetClassMethod.slice(delim + 1, targetClassMethod.length);
|
|
|
|
var hook = Java.use(targetClass);
|
|
var overloadCount = hook[targetMethod].overloads.length;
|
|
|
|
LOG({ tracing: targetClassMethod, overloaded: overloadCount }, { c: Color.Green });
|
|
|
|
for (var i = 0; i < overloadCount; i++) {
|
|
hook[targetMethod].overloads[i].implementation = function () {
|
|
var log = { '#': targetClassMethod, args: [] };
|
|
|
|
for (var j = 0; j < arguments.length; j++) {
|
|
var arg = arguments[j];
|
|
// quick&dirty fix for java.io.StringWriter char[].toString() impl because frida prints [object Object]
|
|
if (j === 0 && arguments[j]) {
|
|
if (arguments[j].toString() === '[object Object]') {
|
|
var s = [];
|
|
for (var k = 0, l = arguments[j].length; k < l; k++) {
|
|
s.push(arguments[j][k]);
|
|
}
|
|
arg = s.join('');
|
|
}
|
|
}
|
|
log.args.push({ i: j, o: arg, s: arg ? arg.toString(): 'null'});
|
|
}
|
|
|
|
var retval;
|
|
try {
|
|
retval = this[targetMethod].apply(this, arguments); // might crash (Frida bug?)
|
|
log.returns = { val: retval, str: retval ? retval.toString() : null };
|
|
} catch (e) {
|
|
console.error(e);
|
|
}
|
|
LOG(log, { c: Color.Blue });
|
|
return retval;
|
|
}
|
|
}
|
|
}
|
|
|
|
// remove duplicates from array
|
|
function uniqBy(array, key) {
|
|
var seen = {};
|
|
return array.filter(function (item) {
|
|
var k = key(item);
|
|
return seen.hasOwnProperty(k) ? false : (seen[k] = true);
|
|
});
|
|
}
|
|
|
|
|
|
var Main = function() {
|
|
Java.perform(function () { // avoid java.lang.ClassNotFoundException
|
|
[
|
|
// "java.io.File",
|
|
'java.net.Socket'
|
|
].forEach(traceClass);
|
|
|
|
Java.use('java.net.Socket').isConnected.overload().implementation = function () {
|
|
LOG('Socket.isConnected.overload', { c: Color.Light.Cyan });
|
|
printBacktrace();
|
|
return true;
|
|
}
|
|
});
|
|
};
|
|
|
|
Java.perform(Main);
|
|
|
|
|
|
```
|
|
|
|
<details>
|
|
<summary>Output example</summary>
|
|
TODO
|
|
</details>
|
|
|
|
<br>[⬆ Back to top](#table-of-contents)
|
|
|
|
#### Get Android ID
|
|
The [ANDROID_ID](https://developer.android.com/reference/android/provider/Settings.Secure.html#ANDROID_ID) is unique in each application in Android.
|
|
|
|
|
|
```javascript
|
|
function getContext() {
|
|
return Java.use('android.app.ActivityThread').currentApplication().getApplicationContext().getContentResolver();
|
|
}
|
|
|
|
function logAndroidId() {
|
|
console.log('[-]', Java.use('android.provider.Settings$Secure').getString(getContext(), 'android_id'));
|
|
}
|
|
```
|
|
|
|
<details>
|
|
<summary>Output example</summary>
|
|
https://stackoverflow.com/a/54818023/2655092
|
|
</details>
|
|
|
|
<br>[⬆ Back to top](#table-of-contents)
|
|
|
|
#### iOS alert box
|
|
|
|
```js
|
|
var UIAlertController = ObjC.classes.UIAlertController;
|
|
var UIAlertAction = ObjC.classes.UIAlertAction;
|
|
var UIApplication = ObjC.classes.UIApplication;
|
|
var handler = new ObjC.Block({ retType: 'void', argTypes: ['object'], implementation: function () {} });
|
|
|
|
ObjC.schedule(ObjC.mainQueue, function () {
|
|
var alert = UIAlertController.alertControllerWithTitle_message_preferredStyle_('Frida', 'Hello from Frida', 1);
|
|
var defaultAction = UIAlertAction.actionWithTitle_style_handler_('OK', 0, handler);
|
|
alert.addAction_(defaultAction);
|
|
// Instead of using `ObjC.choose()` and looking for UIViewController instances on the heap, we have direct access through UIApplication:
|
|
UIApplication.sharedApplication().keyWindow().rootViewController().presentViewController_animated_completion_(alert, true, NULL);
|
|
})
|
|
```
|
|
|
|
<details>
|
|
<summary>Output example</summary>
|
|
TODO
|
|
</details>
|
|
|
|
<br>[⬆ Back to top](#table-of-contents)
|
|
|
|
|
|
#### File Access
|
|
|
|
Log each file open
|
|
|
|
```js
|
|
Interceptor.attach(ObjC.classes.NSFileManager['- fileExistsAtPath:'].implementation, {
|
|
onEnter: function (args) {
|
|
console.log('open' , ObjC.Object(args[2]).toString());
|
|
}
|
|
});
|
|
```
|
|
|
|
<details>
|
|
<summary>Output example</summary>
|
|
TODO
|
|
</details>
|
|
|
|
<br>[⬆ Back to top](#table-of-contents)
|
|
|
|
#### Observe class
|
|
```js
|
|
function observeClass(name) {
|
|
var k = ObjC.classes[name];
|
|
k.$ownMethods.forEach(function(m) {
|
|
var impl = k[m].implementation;
|
|
console.log('Observing ' + name + ' ' + m);
|
|
Interceptor.attach(impl, {
|
|
onEnter: function(a) {
|
|
this.log = [];
|
|
this.log.push('(' + a[0] + ',' + Memory.readUtf8String(a[1]) + ') ' + name + ' ' + m);
|
|
if (m.indexOf(':') !== -1) {
|
|
var params = m.split(':');
|
|
params[0] = params[0].split(' ')[1];
|
|
for (var i = 0; i < params.length - 1; i++) {
|
|
try {
|
|
this.log.push(params[i] + ': ' + new ObjC.Object(a[2 + i]).toString());
|
|
} catch (e) {
|
|
this.log.push(params[i] + ': ' + a[2 + i].toString());
|
|
}
|
|
}
|
|
}
|
|
|
|
this.log.push(
|
|
Thread.backtrace(this.context, Backtracer.ACCURATE)
|
|
.map(DebugSymbol.fromAddress)
|
|
.join('\n')
|
|
);
|
|
},
|
|
|
|
onLeave: function(r) {
|
|
try {
|
|
this.log.push('RET: ' + new ObjC.Object(r).toString());
|
|
} catch (e) {
|
|
this.log.push('RET: ' + r.toString());
|
|
}
|
|
|
|
console.log(this.log.join('\n') + '\n');
|
|
}
|
|
});
|
|
});
|
|
}
|
|
```
|
|
|
|
<details>
|
|
<summary>Output example</summary>
|
|
|
|
`observeClass('Someclass$innerClass');`
|
|
|
|
```
|
|
Observing Someclass$innerClass - func
|
|
Observing Someclass$innerClass - empty
|
|
(0x174670040,parameterName) Someclass$innerClass - func
|
|
0x10048dd6c libfoo!0x3bdd6c
|
|
0x1005a5dd0 libfoo!0x4d5dd0
|
|
0x1832151c0 libdispatch.dylib!_dispatch_client_callout
|
|
0x183215fb4 libdispatch.dylib!dispatch_once_f
|
|
RET: 0xabcdef
|
|
```
|
|
|
|
</details>
|
|
|
|
<br>[⬆ Back to top](#table-of-contents)
|
|
|
|
|
|
#### Find iOS application UUID
|
|
|
|
Get UUID for specific path when attached to an app by reading plist file under each app container.
|
|
|
|
```js
|
|
var PLACEHOLDER = '{UUID}';
|
|
function extractUUIDfromPath(path) {
|
|
var bundleIdentifier = String(ObjC.classes.NSBundle.mainBundle().objectForInfoDictionaryKey_('CFBundleIdentifier'));
|
|
var path_prefix = path.substr(0, path.indexOf(PLACEHOLDER));
|
|
var plist_metadata = '/.com.apple.mobile_container_manager.metadata.plist';
|
|
var folders = ObjC.classes.NSFileManager.defaultManager().contentsOfDirectoryAtPath_error_(path_prefix, NULL);
|
|
for (var i = 0, l = folders.count(); i < l; i++) {
|
|
var uuid = folders.objectAtIndex_(i);
|
|
var metadata = path_prefix + uuid + plist_metadata;
|
|
var dict = ObjC.classes.NSMutableDictionary.alloc().initWithContentsOfFile_(metadata);
|
|
var enumerator = dict.keyEnumerator();
|
|
var key;
|
|
while ((key = enumerator.nextObject()) !== null) {
|
|
if (key == 'MCMMetadataIdentifier') {
|
|
var appId = String(dict.objectForKey_(key));
|
|
if (appId.indexOf(bundleIdentifier) != -1) {
|
|
return path.replace(PLACEHOLDER, uuid);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
console.log( extractUUIDfromPath('/var/mobile/Containers/Data/Application/' + PLACEHOLDER + '/Documents') );
|
|
```
|
|
|
|
<details>
|
|
<summary>Output example</summary>
|
|
TODO
|
|
</details>
|
|
|
|
<br>[⬆ Back to top](#table-of-contents)
|
|
|
|
|
|
#### Extract cookies
|
|
|
|
```js
|
|
var cookieJar = {};
|
|
var cookies = ObjC.classes.NSHTTPCookieStorage.sharedHTTPCookieStorage().cookies();
|
|
for (var i = 0, l = cookies.count(); i < l; i++) {
|
|
var cookie = cookies['- objectAtIndex:'](i);
|
|
cookieJar[cookie.Name()] = cookie.Value().toString(); // ["- expiresDate"]().toString()
|
|
}
|
|
console.log(JSON.stringify(cookieJar, null, 2));
|
|
```
|
|
|
|
<details>
|
|
<summary>Output example</summary>
|
|
```js
|
|
{
|
|
"key1": "value 1",
|
|
"key2": "value 2"
|
|
}
|
|
```
|
|
</details>
|
|
|
|
<br>[⬆ Back to top](#table-of-contents)
|
|
|
|
|
|
#### Describe class members
|
|
|
|
Print map of members (with values) for each class instance
|
|
|
|
```js
|
|
ObjC.choose(ObjC.classes[clazz], {
|
|
onMatch: function (obj) {
|
|
console.log('onMatch: ', obj);
|
|
Object.keys(obj.$ivars).forEach(function(v) {
|
|
console.log('\t', v, '=', obj.$ivars[v]);
|
|
});
|
|
},
|
|
onComplete: function () {
|
|
console.log('onComplete', arguments.length);
|
|
}
|
|
});
|
|
```
|
|
|
|
<details>
|
|
<summary>Output example</summary>
|
|
TODO
|
|
</details>
|
|
|
|
<br>[⬆ Back to top](#table-of-contents)
|
|
|
|
#### Class hierarchy
|
|
|
|
Object.keys(ObjC.classes) will list all available Objective C classes,
|
|
but actually this will return all classes loaded in current process, including system frameworks.
|
|
If we want something like weak_classdump, to list classes from executable it self only, Objective C runtime already provides such function [objc_copyClassNamesForImage](#https://developer.apple.com/documentation/objectivec/1418485-objc_copyclassnamesforimage?language=objc)
|
|
|
|
```js
|
|
var objc_copyClassNamesForImage = new NativeFunction(
|
|
Module.findExportByName(null, 'objc_copyClassNamesForImage'),
|
|
'pointer',
|
|
['pointer', 'pointer']
|
|
);
|
|
var free = new NativeFunction(Module.findExportByName(null, 'free'), 'void', ['pointer']);
|
|
var classes = new Array(count);
|
|
var p = Memory.alloc(Process.pointerSize);
|
|
|
|
Memory.writeUInt(p, 0);
|
|
|
|
var path = ObjC.classes.NSBundle.mainBundle().executablePath().UTF8String();
|
|
var pPath = Memory.allocUtf8String(path);
|
|
var pClasses = objc_copyClassNamesForImage(pPath, p);
|
|
var count = Memory.readUInt(p);
|
|
for (var i = 0; i < count; i++) {
|
|
var pClassName = Memory.readPointer(pClasses.add(i * Process.pointerSize));
|
|
classes[i] = Memory.readUtf8String(pClassName);
|
|
}
|
|
|
|
free(pClasses);
|
|
|
|
var tree = {};
|
|
classes.forEach(function(name) {
|
|
var clazz = ObjC.classes[name];
|
|
var chain = [name];
|
|
while (clazz = clazz.$superClass) {
|
|
chain.unshift(clazz.$className);
|
|
}
|
|
|
|
var node = tree;
|
|
chain.forEach(function(clazz) {
|
|
node[clazz] = node[clazz] || {};
|
|
node = node[clazz];
|
|
});
|
|
});
|
|
|
|
send(tree);
|
|
```
|
|
|
|
|
|
<details>
|
|
<summary>Output example</summary>
|
|
TODO
|
|
</details>
|
|
|
|
<br>[⬆ Back to top](#table-of-contents)
|
|
|
|
#### Hook refelaction
|
|
Hooking `objc_msgSend`
|
|
|
|
```py
|
|
import frida, sys
|
|
|
|
f = open('/tmp/log', 'w')
|
|
|
|
def on_message(msg, _data):
|
|
f.write(msg['payload']+'\n')
|
|
|
|
frida_script = """
|
|
Interceptor.attach(Module.findExportByName('/usr/lib/libobjc.A.dylib', 'objc_msgSend'), {
|
|
onEnter: function(args) {
|
|
var m = Memory.readCString(args[1]);
|
|
if (m != 'length' && !m.startsWith('_fastC'))
|
|
send(m);
|
|
}
|
|
});
|
|
"""
|
|
device = frida.get_usb_device()
|
|
pid = device.spawn(["com.example"])
|
|
session = device.attach(pid)
|
|
script = session.create_script(frida_script)
|
|
script.on('message', on_message)
|
|
script.load()
|
|
device.resume(pid)
|
|
sys.stdin.read()
|
|
```
|
|
```sh
|
|
$ sort /tmp/log | uniq -c | sort -n
|
|
```
|
|
|
|
<details>
|
|
<summary>Output example</summary>
|
|
TODO
|
|
</details>
|
|
|
|
<br>[⬆ Back to top](#table-of-contents)
|
|
|
|
#### Intercept Entire Module
|
|
|
|
To reduce UI related functions I ues the following steps:
|
|
|
|
1. Output log to a file using `-o /tmp/log1`
|
|
2. Copy MRU to excludesList using `$ sort /tmp/log1 | uniq -c | sort -rn | head -n20 | cut -d# -f2 | paste -sd "," -`
|
|
|
|
```js
|
|
var mName = 'MyModule', excludeList = ['Alot', 'Of', 'UI', 'Related', 'Functions'];
|
|
Module.enumerateExportsSync(mName)
|
|
.filter(function(e) {
|
|
var fromTypeFunction = e.type == 'function';·
|
|
var notInExcludes = excludeList.indexOf(e.name) == -1;
|
|
return fromTypeFunction && notInExcludes;
|
|
})
|
|
.forEach(function(e) {
|
|
Interceptor.attach(Module.findExportByName(mName, e.name), {
|
|
onEnter: function(args) {
|
|
console.log(mName + "#'" + e.name + "'");
|
|
}
|
|
})
|
|
})
|
|
```
|
|
|
|
<details>
|
|
<summary>Output example</summary>
|
|
TODO
|
|
</details>
|
|
|
|
<br>[⬆ Back to top](#table-of-contents)
|
|
#### TODOs
|
|
- Add GIFs & examples
|
|
- Add links to /scripts
|
|
- Extend universal SSL unpinning for [ios](https://codeshare.frida.re/@dki/ios10-ssl-bypass/) [andoid 1](https://github.com/Fuzion24/JustTrustMe/blob/master/app/src/main/java/just/trust/me/Main.java) [android 2](https://codeshare.frida.re/@pcipolloni/universal-android-ssl-pinning-bypass-with-frida/)
|
|
|
|
- Blog posts:
|
|
* [Fuzzing Universal links iOS](#https://grepharder.github.io/blog/0x03_learning_about_universal_links_and_fuzzing_url_schemes_on_ios_with_frida.html)
|
|
|
|
- References:
|
|
* https://github.com/mwrlabs/needle/blob/master/needle/modules/hooking/frida/script_touch-id-bypass.py
|
|
* https://github.com/as0ler/frida-scripts/blob/master/NSFileManager_Hooker.py
|
|
* https://techblog.mediaservice.net/2017/09/tracing-arbitrary-methods-and-function-calls-on-android-and-ios/
|
|
* https://zhiwei.li/text/2016/02/01/%E7%BC%96%E8%AF%91frida/
|
|
* https://kov4l3nko.github.io/blog/2018-05-27-sll-pinning-hook-sectrustevaluate/
|
|
* https://www.codemetrix.net/hacking-android-apps-with-frida-1/
|
|
* https://awakened1712.github.io/hacking/hacking-frida/
|
|
* https://techblog.mediaservice.net/2018/11/universal-android-ssl-pinning-bypass-2/ # can be improved https://android.googlesource.com/platform/external/conscrypt/+/idea133-weekly-release/src/main/java/org/conscrypt/TrustManagerImpl.java
|