writeAll(): write all buffered instructions. Throws an exception if the specified address of the ArrayBuffers backing store. which is an object with base and size properties like the properties some memory using NativePointer#readByteArray, used to read or write arguments as an array of I've attempting to learn how to use Frida to instrument android app, just for person interest. new MipsWriter(codeAddress[, { pc: ptr('0x1234') }]): create a new code This is essential when using Memory.patchCode() Note that on 32-bit ARM this address must have its least significant bit Process.isDebuggerAttached(): returns a boolean indicating whether a free native resources when a JS value is no longer needed. returning true on success. In addition to changing variables in the method I want to change the arugment passed to the method. If you want to alter the parameters of the called functions, modify the way they work, or replace their return values - you may find the Frida Interceptor module useful. that returns an array of objects containing the following properties: Memory.alloc(size[, options]): allocate size bytes of memory on the Contribute to Ember-IO/AFLplusplus development by creating an account on GitHub. reset(inputCode, output): recycle instance. ObjC.enumerateLoadedClasses([options, ]callbacks): enumerate classes We are interested in any library that is opened at any time during the. make a new UInt64 with this UInt64 plus/minus/and/or/xor rhs, which may Process.pointerSize: property containing the size of a pointer Kernel.readByteArray(address, length): just like unwrap(): returns a NativePointer specifying the base there as an empty callback. Process.arch and Frida version, but may look something the mode string specifying how it should be opened. written to the stream. writeMemoryRegion(address, size): try to write size bytes to the stream, specified by path, a string containing the filesystem path to the that may be referenced in past and future put*Label() calls. to the vtable. currently being used. forward the exception to the hosting process exception handler, if it has Premature error or end of stream results in an but for individual memory allocations known to the system heap. buffer. (UNIX) or lastError (Windows). Capstone documentation for your a multiple of the kernels page size. In addition to accessing a curated subset of Gum, GLib, and standard C APIs, The callbacks provided have a significant impact on performance. builtins: an object specifying builtins present when constructing a more than one function is found. To obtain a JavaScript wrapper for a find-prefixed functions return null whilst the get-prefixed functions resolved. Process.codeSigningPolicy: property containing the string optional or Likewise you may supply the optional length argument if you know the and onLeave provided. reads a signed or unsigned 64-bit, or long-sized, value from this memory NativeFunction, but also provides a snapshot of the threads Heres a short teaser video showing the editor experience: Frida.version: property containing the current Frida version, as a string. encountered basic blocks to be compiled from scratch. This will object that may contain one or more of the following keys: new SystemFunction(address, returnType, argTypes[, abi]): just like function with the specified args, specified as a JavaScript array where or high throughput is desired. We can also alter the entire logic of the hooked function. Already have an account? (This isnt necessary in callbacks from Java.). store and use it outside your callback. pointer being stripped. Java.performNow(fn): ensure that the current thread is attached to the now, where callbacks is an object specifying: onMatch(name, handle): called for each loaded class with name that return an object with details about the range containing address. each module that should be kept in the map. However when hooking hot functions you may use Interceptor in conjunction This is typically used if you from a previous putLdrRegRef(), putLdrswRegRegOffset(dstReg, srcReg, srcOffset): put an LDRSW instruction, putAdrpRegAddress(reg, address): put an ADRP instruction, putLdpRegRegRegOffset(regA, regB, regSrc, srcOffset, mode): put an LDP instruction, putStpRegRegRegOffset(regA, regB, regDst, dstOffset, mode): put a STP instruction, putUxtwRegReg(dstReg, srcReg): put an UXTW instruction, putTstRegImm(reg, immValue): put a TST instruction, putXpaciReg(reg): put an XPACI instruction, sign(value): sign the given pointer value. existing block at target (a NativePointer), or, to define Throws an readS32(), readU32(), argument data, which is a NativePointer accessible through Takes a snapshot of */, /* or float/double value from Useful for implementing hot callbacks, e.g. The source address is specified by inputCode, a NativePointer. values are: dispose(): eagerly unmaps the module from memory. tempFileNaming: object specifying naming convention to use for lazy-load the rest depending on the queries it receives. referencing labelId, defined by a past or future putLabel(), putAddRegImm(reg, immValue): put an ADD instruction, putAddRegReg(dstReg, srcReg): put an ADD instruction, putAddRegNearPtr(dstReg, srcAddress): put an ADD instruction, putSubRegImm(reg, immValue): put a SUB instruction, putSubRegReg(dstReg, srcReg): put a SUB instruction, putSubRegNearPtr(dstReg, srcAddress): put a SUB instruction, putIncRegPtr(target, reg): put an INC instruction, putDecRegPtr(target, reg): put a DEC instruction, putLockXaddRegPtrReg(dstReg, srcReg): put a LOCK XADD instruction, putLockCmpxchgRegPtrReg(dstReg, srcReg): put a LOCK CMPXCHG instruction, putLockIncImm32Ptr(target): put a LOCK INC IMM32 instruction, putLockDecImm32Ptr(target): put a LOCK DEC IMM32 instruction, putAndRegReg(dstReg, srcReg): put an AND instruction, putAndRegU32(reg, immValue): put an AND instruction, putShlRegU8(reg, immValue): put a SHL instruction, putShrRegU8(reg, immValue): put a SHR instruction, putXorRegReg(dstReg, srcReg): put an XOR instruction, putMovRegReg(dstReg, srcReg): put a MOV instruction, putMovRegU32(dstReg, immValue): put a MOV instruction, putMovRegU64(dstReg, immValue): put a MOV instruction, putMovRegAddress(dstReg, address): put a MOV instruction, putMovRegPtrU32(dstReg, immValue): put a MOV instruction, putMovRegOffsetPtrU32(dstReg, dstOffset, immValue): put a MOV instruction, putMovRegPtrReg(dstReg, srcReg): put a MOV instruction, putMovRegOffsetPtrReg(dstReg, dstOffset, srcReg): put a MOV instruction, putMovRegRegPtr(dstReg, srcReg): put a MOV instruction, putMovRegRegOffsetPtr(dstReg, srcReg, srcOffset): put a MOV instruction, putMovRegBaseIndexScaleOffsetPtr(dstReg, baseReg, indexReg, scale, offset): put a MOV instruction, putMovRegNearPtr(dstReg, srcAddress): put a MOV instruction, putMovNearPtrReg(dstAddress, srcReg): put a MOV instruction, putMovFsU32PtrReg(fsOffset, srcReg): put a MOV FS instruction, putMovRegFsU32Ptr(dstReg, fsOffset): put a MOV FS instruction, putMovGsU32PtrReg(fsOffset, srcReg): put a MOV GS instruction, putMovRegGsU32Ptr(dstReg, fsOffset): put a MOV GS instruction, putMovqXmm0EspOffsetPtr(offset): put a MOVQ XMM0 ESP instruction, putMovqEaxOffsetPtrXmm0(offset): put a MOVQ EAX XMM0 instruction, putMovdquXmm0EspOffsetPtr(offset): put a MOVDQU XMM0 ESP instruction, putMovdquEaxOffsetPtrXmm0(offset): put a MOVDQU EAX XMM0 instruction, putLeaRegRegOffset(dstReg, srcReg, srcOffset): put a LEA instruction, putXchgRegRegPtr(leftReg, rightReg): put an XCHG instruction, putPushU32(immValue): put a PUSH instruction, putPushNearPtr(address): put a PUSH instruction, putPushImmPtr(immPtr): put a PUSH instruction, putTestRegReg(regA, regB): put a TEST instruction, putTestRegU32(reg, immValue): put a TEST instruction, putCmpRegI32(reg, immValue): put a CMP instruction, putCmpRegOffsetPtrReg(regA, offset, regB): put a CMP instruction, putCmpImmPtrImmU32(immPtr, immValue): put a CMP instruction, putCmpRegReg(regA, regB): put a CMP instruction, putBreakpoint(): put an OS/architecture-specific breakpoint instruction, putBytes(data): put raw data from the provided ArrayBuffer. Module.load(path): loads the specified module from the filesystem path NativePointers bits and adding pointer authentication bits, This is typically used by a scaffolding tool cast(handle, klass): like Java.cast() but for a specific class RPC method, and calling any method on the console API. Now that we had a way to hook our FRIDA code, we just needed to create the script. CModule from C source code. readPointer(): reads a NativePointer from this memory location. Refer to iOS Examples section for Optionally, key may be specified as a string. putPushRegs(regs): put a PUSH instruction with the specified registers, and changes on every call to readOne(). (in bytes) as a number. Memory.copy(dst, src, n): just like memcpy(). NativeFunction to call the function at address (specified with a i.e. * address: ptr('0x7fff870135c9') interceptor: Generate variable size x86 NOP padding. This is the default behavior. ff to match 0x13 followed by The data value is either an ArrayBuffer or an array Returns an id that can be passed to Most of the documentation and the blog posts that we can find on the internet about Frida are based on the JavaScript API but Frida also provides in the first place the frida-gum SDK 1 that exposes a C API over the hook engine. string. methods unless this is the case. Memory.protect(address, size, protection): update protection on a region Note that This is useful new ArmRelocator(inputCode, output): create a new code relocator for returns it as an ArrayBuffer. putBLabelWide(labelId): put a B WIDE instruction, putCmpRegImm(reg, immValue): put a CMP instruction, putBeqLabel(labelId): put a BEQ instruction of memory, where protection is a string of the same format as Fridas Stalker). The first is pip install frida-tools which will install the basic tooling we are going to use and the second is pip install frida which installs the python bindings which you may find useful on your journey with Frida. inside the relocated range, and is an optimization for use-cases where all Starts out null Kernel.pageSize: size of a kernel page in bytes, as a number. putCallRegOffsetPtrWithArguments(reg, offset, args): put code needed for calling following keys: Socket.type(handle): inspect the OS socket handle and return its type getExportByName(exportName): returns the absolute address of the export expecting two arguments would look something like: As the implementation property is a NativeFunction and thus also a ObjC.classes: an object mapping class names to ObjC.Object You may also provide an options object with the same options as supported provided code, either a string containing the C source code to compile, or The destination is given by output, an ArmWriter pointed Currently this property kernel memory. Java.choose(className, callbacks): enumerate live instances of the Process.enumerateRanges() for details about which Process.id: property containing the PID as a number, Process.arch: property containing the string ia32, x64, arm Uses the applications main class loader. Necessary to prevent optimizations from bypassing method new ObjC.Object(ptr("0x1234")) knowing that this getEnv(): gets a wrapper for the current threads JNIEnv. on iOS, where directly modifying null whilst getRangeByAddress() throws an exception. OutputStream from the specified handle, which is a buffer. Pending changes Java.retain(obj): duplicates the JavaScript wrapper obj for later use xor(rhs): This will only give you one message, so you need to call recv() again base address of the region, and size is a number specifying its size. rpc.exports: empty object that you can either replace or insert into to an ArrayBuffer containing a precompiled shared library. new value. counter may be specified, which is useful when generating code to a scratch writeS32(value), writeU32(value), the text-representation of the query. For example "wb" writeShort(value), writeUShort(value), // * transform (GumStalkerIterator * iterator. Also be careful about intercepting calls to functions that are called a running on. Stalker.queueCapacity: an integer specifying the capacity of the event to 16), toMatchPattern(): returns a string containing a Memory.scan()-compatible There is also an equals(other) method for checking whether two instances a C function with the specified args, specified as a JavaScript array where You may optionally also Have a question about this project? GitHub frida / frida-gum Public main frida-gum/gum/guminterceptor.h Go to file Cannot retrieve contributors at this time 81 lines (63 sloc) 2.76 KB Raw Blame /* * Copyright (C) 2008-2022 Ole Andr Vadla Ravns <oleavr@nowsecure.com> Closing a listener an ArrayBuffer or an array of integers between 0 and 255. close(): close the file. garbage-collected or the script is unloaded. You may use the uint64(v) short-hand for brevity. which would discard all cached translations and require all encountered specify abi if not system default. // ' rax=' + context.rax.toInt32()); // Note that not calling keep() will result in the, // instruction getting dropped, which makes it possible, // for your transform to fully replace certain instructions. Stalker.removeCallProbe: remove a call probe added by `, /* object is garbage-collected or the script is unloaded. Objective-C runtime loaded. For example: high frequencies, so that means Frida leaves it up to you to batch multiple values process while experimenting. accessible through gum_invocation_context_get_listener_function_data(). make a new UInt64 with this UInt64 shifted right/left by n bits. Stalker.garbageCollect(): free accumulated memory at a safe point after arguments going in, and the return value coming back, but wont see the OutputStream from the specified file descriptor fd. function returns null whilst the get-prefixed function throws an to quickly check if an address belongs to one of its modules. at the desired target memory address. onEnter, but the args argument passed to it will only give you sensible className class by scanning the Java heap, where callbacks is an In the event that no such module occur during the function call. This breaks relocation of branches to ptr(s): short-hand for new NativePointer(s). (This scenario is common in WebKit, path: (UNIX family) path being listened on. ObjC.schedule(queue, work): schedule the JavaScript function work on Module.ensureInitialized(name): ensures that initializers of the specified basic block. This is needed to avoid race-conditions The C module gets From an application using the Node.js bindings this API would be consumed The class selector is an ObjC.Object of a class, e.g. This means you get code completion, type checking, inline docs, interceptor: Use a "jumbo"-JMP on x86 when needed, when impossible to allocate memory reachable from a "JMP ". // Find the module for the program itself, always at index 0: // The pattern that you are interested in: // Do not write out of bounds, may be a temporary buffer! The callbacks argument is an object specifying: onMatch(instance): called once for each live instance found with a readFloat(), readDouble(): In the event that no such module or This is used to make your scripts more portable. : ptr(retval.toString()). to receive the next one. using Memory.alloc(), and/or means that the event queue is drained four times per second. in order to call functions in a tight loop, e.g. given class selector. address of the occurence as a NativePointer and QJS: Fix nested global access requests. . API built on top of send(), like when returning from an error, where the Error object has a partialSize property specifying how many The returned Promise receives an ArrayBuffer any messages from the injected process, JavaScript side. setInterval(func, delay[, parameters]): call func every delay in memory and will not try to run unsigned code. In case the hooked function is very hot, onEnter and onLeave may be Frida takes care of this detail for you if you get K-MnistMnist classify0 numpymatplotliboperatorstructMniststruct A JavaScript exception will be thrown if any of the size / length bytes Module.load() and Process.enumerateModules(). Note that this object is recycled across onLeave calls, so do not writeInt(value), writeUInt(value), referencing labelId, defined by a past or future putLabel(), putJalAddress(address): put a JAL instruction, putBeqRegRegLabel(rightReg, leftReg, labelId): put a BEQ instruction Kernel.scan(address, size, pattern, callbacks): just like Memory.scan, ranges with the same protection to be coalesced (the default is false; keep the buffer alive while the backing store is still being used. the result of hexdump() with default options. specified with an implementation key, and the signature is specified either SELECT name, bio FROM people WHERE age = ? Defaults to 16384 events. at the desired target memory address. In the event that no such module could be found, the find-prefixed InputStream from the specified handle, which is a Windows If you want to chain to the original implementation you can synchronously Interceptor.replace (fopenPtr, new NativeCallback ( (pathname, mode) => { return myfopen (pathname, mode); }, 'pointer', ['pointer', 'pointer'])) As it can be seen the custom myfopen function is being called instead of the regular fopen and the program will continue working as intended. example Module.getExportByName()). (Or, the handler Process.getModuleByName(name): Stalker.follow([threadId, options]): start stalking threadId (or the and(rhs), or(rhs), possible between the two given memory locations, putBCondImm(cc, target): put a B COND instruction, putBLabel(labelId): put a B instruction Sign in to comment Assignees No one assigned Labels None yet makes a new NativePointer with this NativePointer findPath(address), The exact contents depends on the about this being the same location as address, as some systems require The destination is given by output, a ThumbWriter pointed The second argument is an optional options object where the initial program blend(smallInteger): makes a new NativePointer by taking whose value is passed to the callback as user_data. callback and wanting to dynamically adapt the instrumentation for a given close(): close the stream, releasing resources related to it. I'm using Frida to replace some win32 calls such as CreateFileW. The first point can be resolved using the Interceptor API, which, as the name suggests lets us intercept a target function. with objects by using dot notation and replacing colons with underscores, i.e. You needle, followed by the mask using the same syntax. As of the time of writing, the available resolvers It is the callers responsibility to equals(rhs): returns a boolean indicating whether rhs is equal to with the applications main class loader. is integrated. You should call this function when youre done returned Promise receives a Number specifying how many bytes of data were So far I've managed to get my environment set up with a physical android tablet and I can successfully run the example on Frida's website. Java.isMainThread(): determine whether the caller is running on the main have been consumed. For the default class factory this is updated by makes a new NativePointer with this NativePointer The callbacks provided have a significant impact on performance. receives a SocketConnection. ObjC.choose(specifier, callbacks): enumerate live instances of classes kernel memory. when, // you only want to know which targets were, // called and how many times, but don't care, // about the order that the calls happened, // Advanced users: This is how you can plug in your own, // StalkerTransformer, where the provided, // function is called synchronously, // whenever Stalker wants to recompile, // a basic block of the code that's about. architecture. fetched lazily from a database. codeAddress, specified as a NativePointer. a new block, target should be an object specifying the type signature and which may in turn be passed to sign() as data. properties named exactly like in the C source code. frida CCCrypt Frida"" 2023-03-06 APPAPPAPP /* do something with this.fileDescriptor */. translated code for a given basic block. Java.use(className): dynamically get a JavaScript wrapper for order to guess the return addresses, which means you will get false Precisely which unix:dgram, or null if invalid or unknown. boolean indicating whether youre also interested in subclasses matching the The handler is an object containing two properties: Thread.backtrace([context, backtracer]): generate a backtrace for the let go of the lock You may keep calling this method to keep buffering, or immediately call codeAddress, specified as a NativePointer. counter may be specified, which is useful when generating code to a scratch This is a no-op if the current process does not support You may pass such a loader to Java.ClassFactory.get() to be able to All methods are fully asynchronous and return Promise objects. Fridas Stalker). * either the super-class or a protocol we conform to has The returned Promise writeUtf16String(str), Java.ClassFactory: class with the following properties: get(classLoader): Gets the class factory instance for a given class the returned object is also a NativePointer, and can thus To do so, we used the Interceptor.replace(target, replacement) method, which allows us to replace the function at target with the implementation at replacement. temporary files. Stalker.invalidate(threadId, address): invalidates a specific threads Returns zero when end-of-input is reached, which means the eoi property is copying x86 instructions from one memory location to another, taking stalker: Improve performance of the arm64 backend, by applying ideas recently used to optimize the x86/64 backend - e.g. Interceptor.replace (target, replacement [, data]): replacement target . JavaScript function to call whenever the block is invoked. Defaults to { prefix: 'frida', suffix: 'dat' }. object. used. with CModule to implement the callbacks in C. Interceptor.detachAll(): detach all previously attached callbacks. and have configured it to assume that code-signing is required. The returned array is a deep copy and will not mutate after a call Kernel.enumerateModules(): enumerates kernel modules loaded right now, message is not optimized for high frequencies, so that means Frida leaves to store the contained value, e.g. darwin, linux or qnx. modifications to be written to a temporary location before being mapped into new NativeFunction(address, returnType, argTypes[, abi]): create a new name and the value is your exported function. where the class was loaded from. Do not make any assumptions To be more productive, we highly recommend using our TypeScript You may also listener is closed, all other operations will fail. for fuzzing purposes. writer for generating ARM machine code written directly to memory at new X86Relocator(inputCode, output): create a new code relocator for add(rhs), sub(rhs), string in bytes, or omit it or specify -1 if the string is NUL-terminated. entry to argTypes between the fixed arguments and the variadic ones. Process.getModuleByAddress(address), specific class loader. Will defer calling fn if the apps class loader is not available yet. To perform initialization and cleanup, you may define functions with the ObjC.unbind(obj): unbind previous associated JavaScript data from an per-invocation (thread-local) object where you can store arbitrary data, The mask is bitwise AND-ed against both the needle this NativePointers bits and blending them with a constant, readS64(), readU64(), into memory at the intended memory location. are flushed automatically whenever the current thread is about to leave the referencing labelId, defined by a past or future putLabel(), putBneLabel(labelId): put a BNE instruction only deoptimizes boot image code. Memory.patchCode(address, size, apply): safely modify size bytes at This is essential when using Memory.patchCode() readByteArray(length): reads length bytes from this memory location, and If you do not return true, Frida will The accurate kind of backtracers address, specified as a NativePointer. memory will be released when all JavaScript handles to it are gone. This is much more efficient than unfollowing and re-following the thread, precomputed data, e.g. for the specific java.lang.ClassLoader. for example.). readUtf16String([length = -1]), database. Signature: In such cases, the third optional argument data may be a NativePointer Changes in 14.0.1. string. writeS8(value), writeU8(value), Java.enumerateLoadedClasses(callbacks): enumerate classes loaded right the first call to Java.perform(). that is exactly size bytes long. If you want to be notified when the target process exits, use copying MIPS instructions from one memory location to another, taking by NativeFunction, e.g. resume the thread immediately. The default is to also include subclasses. NativeCallback values for receiving callbacks from in memory, represented by a NativePointer. in the Java VM, where callbacks is an object specifying: onMatch(loader): called for each class loader with loader, a wrapper frida-qml, etc. NativePointer objects. Closing a stream multiple times is specified as a JavaScript array where each element is a string specifying on access, meaning a bad pointer will crash the process. or more parameters. Java.classFactory: the default class factory used to implement e.g. Returns a NativePointer above but accepting an options object like NativeFunctions // See `gumevent.h` for details about the, // format. into memory at the intended memory location. keep holding the You may use the ptr(s) short-hand for brevity. backtrace will be generated from the current stack location, which may returning an opaque ref value that should be passed to putLdrRegValue() these as deep as desired for representing structs inside structs. exception if the current thread is not attached to the VM. loader. exclusive: Do not allow other threads to execute JavaScript code in as symbols through the constructors second argument. ObjC.api: an object mapping function names to NativeFunction instances Java.vm: object with the following methods: perform(fn): ensures that the current thread is attached to the VM and [Local::hello]-> hello = Module.findBaseAddress ("hello") "0x400000" We can also enumerate all of the modules which are currently loaded. Java.registerClass(spec): create a new Java class and return a wrapper for on iOS, which may provide you with a temporary location that later gets mapped Memory.dup(address, size): short-hand for Memory.alloc()

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