Browse other questions tagged, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site. Making statements based on opinion; back them up with references or personal experience. Find centralized, trusted content and collaborate around the technologies you use most. Frida-Ios-Hook : A Tool That Helps You Easy Trace Classes, Functions, And Modify The Return Values. I'm dealing with a stripped ELF arm64 shared object that came from an APK. rev2023.5.1.43405. i am reversing this android app for learning purposes and the app implements all of the interesting functionality on the native layer, so i ran the app on a arm android studio image and reversed the shared library .so the app is making calls to, using ghidra i managed to decompile to shared object into c and i found a lot of functions that make calls to each other and i also found functions that respect the jni naming convention. Episode about a group who book passage on a space ship controlled by an AI, who turns out to be a human who can't leave his ship? System.exit.implementation = function() { * @param {NativePointer} retval - Return value represented If we change the next 4 bytes we By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. what this script does is that it gets all functions in the lib and then generates frida hook script for them, may be technically some fallacies, didn't investigate it. EDIT - issue identified. If the Image base is not 0 you have to substract this values from the shown address to get the address you can use for hooking. If we can supply a To learn more, see our tips on writing great answers. This article shows the most useful code snippets for copy&paste to save time reading the lengthy documentation page. rev2023.5.1.43405. The shown name like FUN_002d5044 is generated by Ghidra as the function has no name. Frida JavaScript APIs are well described in the API documentation. It is very similar to the -finstrument-functions, #include Why did DOS-based Windows require HIMEM.SYS to boot? The first step in using Frida for hooking is finding the target function. Not the answer you're looking for? Work fast with our official CLI. """, #include Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. These hooks patch call to ssl_verify_cert_chain in ssl3_get_server_certificate. //, onLeave(retval) { To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Regarding the code execution, we can profile it with: In the context of profiling LIEF, Im mostly interested in profiling the code at the functions level: Please edit your question and add the relevant parts of the Frida code you use. The base address of an Android app is random (because of ASLR), so you have to do some math to convert the function address from Ghidra to the hooking address in Frida, @Robert, Thank you for putting up with my ignorance. I assume you have to know the address and the new hex value of the encoded b.eq command. Most of the documentation and the blog posts that we can find on the internet about Frida are based on over the hook engine. Note that the address shown in Ghidra may include also a fixed base address (named Image Base - to see it go to Window -> Memory map -> Set Image Base ). June 30, 2022. * Auto-generated by Frida. So as you can see, Frida injected itself into Twitter, enumerated the loaded shared libraries and hooked all the functions whose names start with either recv or read. How to hook methods with specific arguments in Frida? We need to know: Address of the function we want to call; Return type; Argument number and type As arguments we need to pass the pointer to this and our Vector3. I've calculated the addresses of functions within the Shared Object I am interested in and I have validated they are the correct addresses by dumping memory at those locations and matching the bytes with the shared object's assembly. I disassembled an arm64 executable, when running the app on my iPhone, I can see a lot of classes also in the disassembled executable, but I can't reach these sub_ objects. Future verions of Frida OpenSSL 1.0.2 certificate pinning hook on arm64, improved pattern, possibly for different compiler version or slighlty updated OpenSSL, use if first version does not find patch location. For Windows 10 users, from the Start menu, select Windows Accessories, and then select Quick Assist. Can I use an 11 watt LED bulb in a lamp rated for 8.6 watts maximum? * do not worry about race-conditions. * but instead use "this" which is an object for keeping To learn more, see our tips on writing great answers. ', referring to the nuclear power plant in Ignalina, mean? following example): The following script shows how to hook calls to functions inside a target By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Functions I'm interested in are not exported. Once the hooking code has been generated frida-trace will not overwrite it which means you can adapt the code to your need. Lets take a simple example to explain what Frida does. It will return the un-modified function address from the first libfoo.so and causing my hook not working. To learn more, see our tips on writing great answers. The best answers are voted up and rise to the top, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site. If nothing happens, download Xcode and try again. -l to specify the script to load. Use Git or checkout with SVN using the web URL. over the connection. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Is there any known 80-bit collision attack? there are some exported and non-exported functions. var moduleName = "{{moduleName}}", nativeFuncAddr = {{methodAddress}}; Interceptor.attach(Module.findExportByName(null, "dlopen"), {. and all methods that contain the case sensitive string certificate. Start the program and make note of the address of f() (0x400544 in the An example for an method address calculation in the app main binary is shown here: reverseengineering.stackexchange.com/a/30881/1848, How a top-ranked engineering school reimagined CS curriculum (Ep. For some reasons, frida . My work around is to hook dlsym and replace the address of the target function to the modified function in second libfoo.so. Has anyone been diagnosed with PTSD and been able to get a first class medical? # [ It's a little bit more meaningful to read as output :-D does frida support hook a function by module + offset. Any idea why the interceptor hooks don't seem to trigger, or how to see what thread is interacting with a module and possibly get a stacktrace of what is being called? mov r10,rcx mov eax,*SYSCALL NUMBER* test byte ptr [someaddress] jne [ntdll function address] syscall ret. f(1911); // and param 3 is an array of input types Passing negative parameters to a wolframscript. What differentiates living as mere roommates from living in a marriage-like relationship? Firstly, and as mentioned previous section, Frida takes a void* pointer on the function to hook. const f = new NativeFunction(ptr("%s"), 'void', ['int']); */, /** Horizontal and vertical centering in xltabular. How to hook fopen using Frida in Android? Learn more about Stack Overflow the company, and our products. Create the file struct_mod.py as follows: Note that this script demonstrates how the Module.getExportByName() API can You must call removeView() on the child's parent first when hooking, how do you solve it? For Windows 11 users, from the Start menu, select All Apps, and then . 12 minute read. Under Settings -> Security you can install new trusted certificates. Why refined oil is cheaper than cold press oil? Can I use an 11 watt LED bulb in a lamp rated for 8.6 watts maximum? This way only works for exported functions. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Frida-Ios-Hook: A Tool That Helps You Easy Trace Classes, Functions, And Modify Shoggoth Asmjit Based Polymorphic Encryptor. // retval.replace(0); // Use this to manipulate the return value from the compilation process. However, Frida's interceptor never seems to trigger. lines: Use similar methods, like Memory.alloc() and Memory.protect() to manipulate Already on GitHub? to get the execution time of functions. Hook InputputStream & print buffer as ascii with char limit & exclude list. If a hooked method calls directly or indirectly another hooked method frida will automatically indent the method names so that you get a lightweight stack trace. Making statements based on opinion; back them up with references or personal experience. call.py with the contents: and keep a watchful eye on the terminal (still) running hello: Injecting integers is really useful, but we can also inject strings, 1 minute read. xcolor: How to get the complementary color, Two MacBook Pro with same model number (A1286) but different year. args[0] = ptr("1337"); can you explain how can i find methods by arguments with that? It only takes a minute to sign up. The frida-trace documentation uses the term -j '*! Frida has the capability to patch memory, check Frida API documentation. we target embedded systems like iPhone or Android devices, it starts to reach the limits. arguments, and do custom calls to functions inside a target process. about functions for which we dont have the source code, this blog post introduces another use case to * signature of recvfrom. BEAD NEWS BEARS you can and have been able to for years with the right environment. Such methods don't have a name and thus need to be accessed using their address. * NativePointer object to an element of this array. Intercept funcPtr & log who read/write to x2 via removing permissions w/ mprotect. object into memory and hooking our process with Frida, and using Interceptor Making statements based on opinion; back them up with references or personal experience. I'm learning and will appreciate any help. Now, lets have a look at the generated recvfrom.js: Now, replace the log() line with the following: Save the file (it will be reloaded automatically) and perform some action in // First, let's give ourselves a bit of memory to put our struct in: registerNativeMethods can be used as anti reversing technique to the native .so libraries, e.g. The source code used in this blog post is available on Github: lief-project/frida-profiler, See frida-gum-devkit-14.2.13-linux-x86_64.tar.xz on https://github.com/frida/frida/releases, GSIZE_TO_POINTER (gum_module_find_export_by_name (, The speed (especially when rebuilding large ELF binaries), Inserting log functions in the source code. Print map of members (with values) for each class instance, Object.keys(ObjC.classes) will list all available Objective C classes, This article shows the most useful code snippets for copy&paste to save time reading the lengthy documentation page. function, as you can see in the output above. CMLoot : Find Interesting Files Stored On (System Center) Configuration Manager RedditC2 : Abusing Reddit API To Host The C2 Traffic. I am using frida to hook functions inside of a Shared Object that is used by an Android APK. one or more moons orbitting around a double planet system, Image of minimal degree representation of quasisimple group unique up to conjugacy. to get the void*: Secondly, the example frida-gum-example.c uses an enum to identify the function being hooked: In our case, we dont know beforehand which functions will be hooked or profiled by the user. The text was updated successfully, but these errors were encountered: Yes, you can do: Interceptor.attach(Module.findBaseAddress('libfoo.so').add(0x1234), Just keep in mind that the address needs to have its least significant bit set to 1 for Thumb functions. We can use Frida to call functions inside a target process. It's not them. https://awesomeopensource.com/project/iddoeldor/frida-snippets, Categories: Supported targets are: Windows macOS GNU/Linux iOS Android QNX You signed in with another tab or window. Is a downhill scooter lighter than a downhill MTB with same performance? java.lang.reflect.Method#invoke(Object obj, Object args, boolean bool). 565), Improving the copy in the close modal and post notices - 2023 edition, New blog post from our CEO Prashanth: Community is the future of AI, Frida script returning different instruction at address compared to entering commands in repl. const Exception = Java.use("java.lang.Exception"); By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. const Log = Java.use("android.util.Log"); onEnter(args) { A boy can regenerate, so demons eat him for years. Since (spoiler) I started to implement a parser for the Dyld shared cache and re-direct our client to a different port. frida-trace -U com.foobar.helloworld -a libfoo.so!0x1234. by the client. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. By clicking Sign up for GitHub, you agree to our terms of service and If nothing happens, download GitHub Desktop and try again. * to be presented to the user. * could auto-generate based on OS API references, manpages, process. This DoS bug was reported to Tencent, but they decided not to fix because its not critical. Could a subterranean river or aquifer generate enough continuous momentum to power a waterwheel for the purpose of producing electricity? something along the lines of: Thats nothing, though. be able to send messages back to client in return. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. difficult hours spent staring at dissassembly without end. Alternatively you can hook more methods. It support script for trace classes, functions, and modify the return values of methods on iOS platform. }); * to be presented to the user. For example, I want to find all method that starts with "bark" and then dumps backtrace, return value, and other arguments. The ANDROID_ID is unique in each application in Android. How to trace execution path in native library on android? """, # Here's some message handling.. Thanks for contributing an answer to Stack Overflow! * state across function calls. @jeqele As this is an answer to a question of you you should be able to accept (the gray arrow left to the answer) and upvote it. Once our script is running, press ENTER The question is that how can I watch all the methods in runtime and filter them by arguments or even return value? The trick here is to use a union To learn more, see our tips on writing great answers. To profile memory consumption, valgrind --tool=massif does the job pretty well out of the box: source, If there is a name collision, method & member has the same name, an underscore will be added to member. If the function is exported, then you can just call Module.findExportByName method with exported function name with DLL name. bytes 0x1388, or 5000 in dec. Connect and share knowledge within a single location that is structured and easy to search. Does the order of validations and MAC with clear text matter? * of inspecting the function calls as they happen. This can be patched at runtime by frida using patchCode var pc = new NativePointer (0x0040065a) Memory.patchCode (pc, 5, function (code) { var cw = new X86Writer (code, { pc: pc }); cw.putMovRegU32 ('eax', 999); cw.flush (); }); When run $ frida -q -l patch_code.js -f ./test --no-pause Spawned `./test`. #include * Called synchronously when about to return from recvfrom. Regarding the API of our profiler, we would like to have : I wont go through all the details of the implementation of the profiler since the source code is on follow are the IP address in hex). Filter script using spawn(S) or attach(A). Couple this with the python ctypes library, and Module.findExportByName (dllName, name) You need to doe some RE on the functions you want to hook. (-j JAVA_METHOD, --include-java-method JAVA_METHOD include JAVA_METHOD -i FUNCTION, --include FUNCTION include [MODULE!]FUNCTION). Making statements based on opinion; back them up with references or personal experience. What does 'They're at four. We can also alter the entire logic of the hooked function. *certificate*' will hook all classes (first star before !) resources online that will tell you whats what. Folder's list view has different sized fonts in different folders. """, """ ViewPager and fragments what's the right way to store fragment's state? In Frida we can call functions located inside the binary though NativeFunction. * @param {function} log - Call this function with a string If this is possible, I'd like to know how can I edit them to change a certain procedure (in my case b.ne to b.eq), and also if it is possible to hook some loc_ objects. // change to null in order to disable the proxy. Have a question about this project? Connect and share knowledge within a single location that is structured and easy to search. You need to check the used base address of the used decompiler (IDA, Ghidra or want else?) Attach to Chrome app on an Android phone and trace two native functions open and strcmp, Launch SnapChat app on an iPhone and trace CommonCrypto API calls, Trace a all Java methods of class BitmapFactory that contain native in method name, TODO: add references this.lib = Memory.readUtf8String(args[0]); console.log("[*] dlopen called with: " + this.lib); Interceptor.attach(Module.findBaseAddress(moduleName).add(nativeFuncAddr), {, console.log("[*] hook invoked", JSON.stringify({{arguments}}, null, ', $ python3.x+ script.py --method SomeClass::someMethod --app com.company.app --module libfoo.so, :param app_id: application identifier / bundle id, :param module_id: shared object identifier / known suffix, will iterate loaded modules (@see dlopen), :return: hook native method and print arguments when invoked, # TODO extract all app's modules via `adb shell -c 'ls -lR /data/app/' + app_if + '*' | grep "\.so"`, '[+] Method not found, remove method flag to get list of methods to select from, `nm` stdout:', 'method name "SomeClass::someMethod", if empty it will print select-list'. because I believe the offsets given by ghidra is not matching to the running apk lib? A tag already exists with the provided branch name. ]. By. * We show how to use Frida to inspect functions as they are called, modify their LIEF starts to be quite mature but there are still some concerns regarding: These limitations are quite acceptable on modern computers but when i can hook any of the above exports successfully yet when i try to hook the below functions i get a export not found how can i hook these native functions? onEnter(args) { Its very trivial to install a user-trusted certificate on Android. 565), Improving the copy in the close modal and post notices - 2023 edition, New blog post from our CEO Prashanth: Community is the future of AI, How can I hook structure members in frida, Calling a method of a Java object passed as argument to hooked function in Frida. Ex: Thanks for contributing an answer to Reverse Engineering Stack Exchange! }); It also generated some boilerplate scripts for taking care * state across function calls. * use in onLeave. Is "I didn't think it was serious" usually a good defence against "duty to rescue"? Bypass screenshot prevention stackoverflow question. It allows peeking deep inside applications, where no source code is available to analyse the behavior. To address these problems, we must identify where are the bottleneck and ideally, without modifying too Find centralized, trusted content and collaborate around the technologies you use most. Asking for help, clarification, or responding to other answers. hook functions on closed-source binaries. An example for intercepting libc#open & logging backtrace if specific file was opened. I was not completely convinced with this solution process and report back a function argument to you. I know the offsets of functions that I want to hook, and I've verified I'm hooking the correct addresses with hexdumps. "); Learn more about Stack Overflow the company, and our products. args[1] = st; Thanks for contributing an answer to Reverse Engineering Stack Exchange! Frida: spawn a Windows/Linux process with command-line arguments, get a variable value from a method at runtime with frida, "Signpost" puzzle from Tatham's collection, the Allied commanders were appalled to learn that 300 glider troops had drowned at sea. Monitor usage of pasteboard. // module, but it's slower, especially over large binaries! Identify blue/translucent jelly-like animal on beach. It only takes a minute to sign up. * @this {object} - Object allowing you to access state You signed in with another tab or window. We have successfully hijacked the raw networking by injecting our own data // Module.getExportByName() can find functions without knowing the source Extracting arguments from a list of function calls, Simple deform modifier is deforming my object, the Allied commanders were appalled to learn that 300 glider troops had drowned at sea, Embedded hyperlinks in a thesis or research paper.
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