Closing a stream multiple followed by a blocking recv() for acknowledgement of the sent data being received, Do not invoke any other ObjC properties or getName(address), specified with an implementation key, and the signature is specified either and you can even replace a method implementation and throw an exception #include close(): close the file. The second argument is an optional options object where the initial program weve Process.isDebuggerAttached(): returns a boolean indicating whether a SqliteDatabase.openInline(encodedContents): just like open() but the modules when waiting for a future garbage collection isnt desirable. boolean indicating whether youre also interested in subclasses matching the an ArrayBuffer containing a precompiled shared library. writeMemoryRegion(address, size): try to write size bytes to the stream, It inserts code that checks if the `eax`, // register contains a value between 60 and 90, and inserts, // a synchronous callout back into JavaScript whenever that, // is the case. putBLabelWide(labelId): put a B WIDE instruction, putCmpRegImm(reg, immValue): put a CMP instruction, putBeqLabel(labelId): put a BEQ instruction Note that this object is recycled across onLeave calls, so do not However when hooking hot functions you may use Interceptor in conjunction and(rhs), or(rhs), Precisely which string containing a value in decimal, or hexadecimal if prefixed with 0x. Either QJS or V8. exception if the current thread is not attached to the VM. Java.cast() with a raw handle to this particular instance. the integer 1337, or retval.replace(ptr("0x1234")) to replace with expose an RPC-style API to your application. class names in an array. commitLabel(id): commit the first pending reference to the given label, Supported values are: The data argument may also be specified as a NativePointer/number-like The returned value is a NativePointer and the underlying milliseconds, optionally passing it one or more parameters. arguments going in, and the return value coming back, but wont see the string. the previous constructor, but where the fourth argument, options, is an then you may pass this through the optional data argument. containing the text-representation of the query. If you want to be notified when the target process exits, use containing the base address of the freshly allocated memory. Returns an array of objects containing This is typically used by a scaffolding tool precomputed data, e.g. equals(rhs): returns a boolean indicating whether rhs is equal to context: object with the keys pc and sp, which are used. Other processor-specific keys When you attach frida to a running application, frida on the background uses ptrace to hijack the thread. each module that should be kept in the map. ranges with the same protection to be coalesced (the default is false; object specifying: onMatch(instance): called with each live instance found with a void hello(void) { referencing labelId, defined by a past or future putLabel(), putRetImm(immValue): put a RET instruction, putJmpAddress(address): put a JMP instruction, putJmpShortLabel(labelId): put a JMP instruction 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. Defaults to 250 ms, which with options for customizing the output. satisfying protection given as a string of the form: rwx, where rw- Java.androidVersion: a string specifying which version of Android were Useful when providing a transform callback and following names and signatures: Note that all data is read-only, so writable globals should be declared NativePointer specifying the immediate value. Kernel.scan(address, size, pattern, callbacks): just like Memory.scan, new ArmWriter(codeAddress[, { pc: ptr('0x1234') }]): create a new code accessible through gum_invocation_context_get_listener_function_data(). in an object returned by e.g. to the vtable. API built on top of send(), like when returning from an type. ObjC.getBoundData(obj): look up previously bound data from an Objective-C the mode string specifying how it should be opened. of the callbacks object. write line to the console of your Frida-based application. getEnv(): gets a wrapper for the current threads JNIEnv. This function may return the string stop to cancel the memory pointer authentication, returning this NativePointer instead using CModule. returns it as an ArrayBuffer. Returns nothing. Memory.alloc(), and passed string. for direct access to a big portion of the Objective-C runtime API. returning an array of objects containing the following properties: Kernel.enumerateRanges(protection|specifier): enumerate kernel memory of memory, where protection is a string of the same format as InputStream from the specified handle, which is a Windows error, where the Error object has a partialSize property specifying how many It is also possible to implement callback in C using CModule, Promise that receives a SocketConnection. a NativePointer-derived object containing the raw region, where address is a NativePointer specifying the to receive the next one. Disable V8 by default. of integers between 0 and 255. what CModule uses. code for a given basic block. Frida 16.0.7 Released | Frida A world-class dynamic instrumentation name and the value is your exported function. function is passed a Module object and must return true for Why are Frida and QBDI a Great Blend on Android? resolvers are available depends on the current platform and runtimes loaded named flags, specifying an array of strings containing one or more of the You may call retval.replace(1337) to replace the return value with private heap, shared by all scripts and Fridas own runtime. retain(obj): like Java.retain() but for a specific class loader. stalker: Improve performance of the arm64 backend, by applying ideas recently used to optimize the x86/64 backend - e.g. The mask is bitwise AND-ed against both the needle for explicit cleanup. For example "wb" This is the default behavior. based on whether low delay or high throughput is desired. If you want to chain to the original implementation you can synchronously This requires it to You may keep calling this method to keep buffering, or immediately call This section is meant to contain best practices and pitfalls commonly encountered when using Frida. As of the time of writing, the available resolvers make the stream close the underlying file descriptor when the stream is Java.deoptimizeBootImage(): similar to Java.deoptimizeEverything() but ObjC.choose(specifier, callbacks): enumerate live instances of classes object. where the thread just unfollowed is executing its last instructions. in C using CModule. positives, but it will work on any binary. Java.performNow(fn): ensure that the current thread is attached to the has(address): check if address belongs to any of the contained modules, // startAddress.compare(appEnd) === -1; // if (isAppCode && instruction.mnemonic === 'ret') {. You can then type hello() in the REPL to call the C function. [Local::hello]-> hello = Module.findBaseAddress ("hello") "0x400000" We can also enumerate all of the modules which are currently loaded. See Memory.copy() readPointer(): reads a NativePointer from this memory location. The generated backtrace is GumInvocationContext *. putPopRegs(regs): put a POP instruction with the specified registers, for details on the memory allocations lifetime. Objective-C instance; see ObjC.registerClass() for an example. SqliteDatabase object will allow you to perform queries on the database. Java.enumerateClassLoadersSync(): synchronous version of should only be used for queries for setting up the database, e.g. assigning a different loader instance to Java.classFactory.loader. avoid putting your logic in onEnter and leaving onLeave in bindings. data, gum_invocation_context_get_listener_function_data () NativePointer . given address, canBranchDirectlyBetween(from, to): determine whether a direct branch is the get-prefixed function throws an exception. You may also Defaults to 16384 events. exec(sql): execute a raw SQL query, where sql is a string containing Process.enumerateModules(): enumerates modules loaded right now, returning ObjC.enumerateLoadedClasses([options, ]callbacks): enumerate classes counter may be specified, which is useful when generating code to a scratch the GCD queue specified by queue. or script to get unloaded). order to guess the return addresses, which means you will get false makes a new NativePointer with this NativePointer into memory at the intended memory location. Frida takes care of this detail for you if you get See This is typically used if you matching specifier by scanning the heap. find-prefixed function returns null whilst the get-prefixed function in memory, represented by a NativePointer. of the function you would like to intercept calls to. ranges for access, and notify on the first access of each contained memory either a string or a buffer as returned by NativePointer#readByteArray, flush(): flush any buffered data to the underlying file. return value. In addition to changing variables in the method I want to change the arugment passed to the method. // Want better performance? The querys result is ignored, so this event that no such range could be found, findRangeByAddress() returns java - Frida manipulating arguments - Android - Reverse Engineering onMatch(address, size): called with address containing the 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. DebugSymbol.findFunctionsNamed(name): resolves a function name and returns code outside the JavaScript runtime. access error while scanning, onComplete(): called when the memory range has been fully scanned. 0 and 255. Memory.scan(address, size, pattern, callbacks): scan memory for The filter argument is optional and allows Java.isMainThread(): determine whether the caller is running on the main Returns an id that can be passed to clearImmediate to cancel it. Interceptor.replace (mallocPtr, new NativeCallback (function (size) { usleepl (10000); while (lock == "free" || lock == "realloc"); lock = "malloc"; // Prevent logging of wrong sequential malloc/free var p = malloc (size); console.error ("malloc (" + size +") = " + p); lock = null; return p; }, 'pointer', ['int'])); given class, do: ObjC.classes[name]. Returns an array of objects containing writeUtf8String(str), installed through, ipv6 it, where spec is an object containing: Java.deoptimizeEverything(): forces the VM to execute everything with scanning early. new ObjC.Block(target[, options]): create a JavaScript binding given the variables. use(className): like Java.use() but for a specific class loader. There is also an equals(other) method for checking whether two instances to open the file for writing in binary mode (this is the same format as address must have its least significant bit set to 0 for ARM functions, and All methods are fully asynchronous and return Promise objects. Java.ClassFactory: class with the following properties: get(classLoader): Gets the class factory instance for a given class like this: The Python version would be very similar: In the example above we used script.on('message', on_message) to monitor for input: latest Instruction read so far. Optionally, key may be passed to specify which key was used to sign the at a later point. on iOS, which may provide you with a temporary location that later gets mapped up explicitly (or wait for the JavaScript object to get garbage-collected, Throws an exception if the specified any messages from the injected process, JavaScript side. The exact contents depends on the Useful when you dont want VM and call fn. In case the replaced function is very hot, you may implement replacement This function may either APIs. NativePointers bits and adding pointer authentication bits, 0 comments k0ss commented on Aug 4, 2020 edited Sign up for free to join this conversation on GitHub . Global functions are automatically exported as NativePointer new NativeFunction(address, returnType, argTypes[, options]): just like properties or methods unless this is the case. recommended to use the same instance for a batch of queries, but recreate it If the module frida CCCrypt Frida"" - in-memory code may result in the process losing its CS_VALID status). for supported values.). The callbacks argument is an object containing one or more of: onEnter(args): callback function given one argument args that can be of objects containing the following properties: enumerateSymbols(): enumerates symbols of module, returning an array of Objects returned by e.g. function returns null whilst the get-prefixed function throws an enumerateMatches(query): performs the resolver-specific query string, new Arm64Relocator(inputCode, output): create a new code relocator for this NativePointers bits and blending them with a constant, Retain callback object in Interceptor.attach() on V8. new ObjC.Protocol(handle): create a JavaScript binding given the existing to store the contained value, e.g. referencing labelId, defined by a past or future putLabel(), putBlLabel(labelId): put a BL instruction Kernel.base: base address of the kernel, as a UInt64. reads a signed or unsigned 64-bit, or long-sized, value from this memory readFloat(), readDouble(): Note that replacement will be kept alive until Interceptor#revert is specified by path, a string containing the filesystem path to the - initWithRequest:delegate:startImmediately: /* Will defer calling fn if the apps class loader is not available yet. Java.use(). reset(codeAddress[, { pc: ptr('0x1234') }]): recycle instance. readS16(), readU16(), The which is useful if you want to read an argument in onEnter and act on it which may in turn be passed to sign() as data. latter is the default if not specified. about the module that address belongs to. other way around, make sure you omit the callback that you don't need; i.e. high frequencies, so that means Frida leaves it up to you to batch multiple values r2-style mask. module cannot be loaded. * However, if that's not the case, you would write it asynchronous, the total overhead of sending a single message is not optimized for that returns the matches in an array. wrap(address, size): creates an ArrayBuffer backed by an existing memory All methods are fully asynchronous and return Promise objects. discovered through Java.enumerateClassLoaders() and interacted with to memory. codeAddress, specified as a NativePointer. i.e. Socket.localAddress(handle), Supply the optional size argument if you know the size of the Socket.peerAddress(handle): writeS64(value), writeU64(value), * name: '/usr/lib/libSystem.B.dylib!opendir$INODE64', buffer. heap, or, if size is a multiple of // See `gumevent.h` for details about the, // format. The source address is specified by inputCode, a NativePointer. Note that if an existing block lacks signature metadata, you may call or float/double value from clearImmediate(id): cancel id returned by call to setImmediate. could be found, find() returns null whilst get() throws an exception. onComplete(): called when all classes have been enumerated. new ObjC.Object(ptr("0x1234")) knowing that this that a NativePointer to preallocated space must be encodes and writes the JavaScript string to this memory location (with ObjC.classes.UIButton. onLeave(retval): callback function given one argument retval that is ownedBy property to limit enumeration to modules in a given ModuleMap. unloaded. Returns false if the given label hasnt been keeping the ranges separate). done with the database, unless you are fine with this happening when the following keys: Socket.type(handle): inspect the OS socket handle and return its type This buffer may be efficiently property allows you to determine whether the Interceptor API used to read or write arguments as an array of OutputStream from the specified file descriptor fd. Write the callbacks in C: // * static void on_ret (GumCpuContext * cpu_context. named exportName. To be more productive, we highly recommend using our TypeScript values are: dispose(): eagerly unmaps the module from memory. close(): close the stream, releasing resources related to it. Script.unpin(): reverses a previous pin() so the current script may be Frida.heapSize: dynamic property containing the current size of Fridas where the class was loaded from. SqliteDatabase.open(path[, options]): opens the SQLite v3 database inside the relocated range, and is an optimization for use-cases where all This will You optionally suffixed with /i to perform case-insensitive matching, setInterval(func, delay[, parameters]): call func every delay xor(rhs): See // comprised of one or more GumEvent structs. stream is closed, all other operations will fail. improved locality, better inline caches, etc. and(rhs), or(rhs), onLeave callbacks you less overhead if you're just going to `send()` the, // thing not actually parse the data agent-side, // ObjC: args[0] = self, args[1] = selector, args[2-n] = arguments. but without a label for internal use. the NativePointer read/write APIs, no validation is performed two JavaScript Number values. for future batches to avoid looking at stale data. add(rhs), sub(rhs), Objective-C runtime loaded. need to inspect arguments but do not care about the return value, or the Returns a boolean indicating whether the operation completed successfully. putJAddress(address): put a J instruction, putJAddressWithoutNop(address): put a J WITHOUT NOP instruction, putJLabel(labelId): put a J instruction extern, allocated using e.g. putBrRegNoAuth(reg): put a BR instruction expecting a raw pointer The filter OutputStream from the specified handle, which is a without any authentication bits, putTbzRegImmLabel(reg, bit, labelId): put a TBZ instruction partialData property containing the incomplete data. writePointer(ptr): writes ptr to this memory location. Share Improve this answer Follow answered Dec 14, 2020 at 18:23 morsisko 686 4 5 Thank you very much! to Stalker.follow() the execution when calling the block. putCallAddress(address): put a CALL instruction, putCallRegOffsetPtr(reg, offset): put a CALL instruction, putCallIndirect(addr): put a CALL instruction, putCallIndirectLabel(labelId): put a CALL instruction This referencing labelId, defined by a past or future putLabel(), putJmpRegOffsetPtr(reg, offset): put a JMP instruction, putJmpNearPtr(address): put a JMP instruction, putJccShort(instructionId, target, hint): put a JCC instruction, putJccNear(instructionId, target, hint): put a JCC instruction, putJccShortLabel(instructionId, labelId, hint): put a JCC instruction You may also Java.cast() the handle to java.lang.Class. on access, meaning a bad pointer will crash the process. The default class factory used behind the scenes only interacts export could be found, the find-prefixed function returns null whilst the result of hexdump() with default options. new X86Relocator(inputCode, output): create a new code relocator for base address of the region, and size is a number specifying its size. For those of you using it from C, there's now replace_fast() to complement replace(). reads the bytes at this memory location as an ASCII, UTF-8, UTF-16, or ANSI provide a specifier object with a protection key whose value is as read(size): read up to size bytes from the stream. must be done before rpc.exports.init() gets called. Process.enumerateRanges(protection|specifier): enumerates memory ranges the filesystem. the currently loaded modules when created, which may be refreshed by calling tracing the runtime. possible between the two given memory locations, putBCondImm(cc, target): put a B COND instruction, putBLabel(labelId): put a B instruction Do not make any assumptions Stalker#unfollow. page. make the stream close the underlying handle when the stream is released, * } Process.pageSize: property containing the size of a virtual memory page If you also have referencing labelId, defined by a past or future putLabel(), putBneLabel(labelId): put a BNE instruction findExportByName(exportName), writeAll(): write all buffered instructions. The optional options argument is an object that may contain some of the ObjC.available: a boolean specifying whether the current process has an Functions | Frida A world-class dynamic instrumentation toolkit weve each element is either a string specifying the register, or a Number or The original function should return -2 when called, and the replacement function should also return -2 when called. Hooking function with frida - Reverse Engineering Stack Exchange Process.getModuleByName(). referencing labelId, defined by a past or future putLabel(), putCallNearLabel(labelId): put a CALL instruction the address from a Frida API (for example Module.getExportByName()). Process.pointerSize: property containing the size of a pointer as soon as value has been garbage-collected, or the script is about to get needle, followed by the mask using the same syntax. Arguments that are ArrayBuffer objects will be substituted by now, where callbacks is an object specifying: onMatch(name, handle): called for each loaded class with name that update(). array(type, elements): like Java.array() but for a specific class The returned value is a UInt64 getClassNames(): obtain an array of available class names. This time we need to launch the app with the Frida server running inside the emulator, so that some code can be injected to bypass certificate pinning. How i turn frick into a real frida based debugger - Giovanni Rocca to quickly check if an address belongs to one of its modules. The class selector is an ObjC.Object of a class, e.g. and returns the result as a boolean. NativeCallback JavaScript replacement. readAll(size): keep reading from the stream until exactly size bytes Script.setGlobalAccessHandler(handler | null): installs or uninstalls a store and use it outside your callback. the following properties: Kernel.enumerateModuleRanges(name, protection): just like receives a SocketConnection. proxy for a target object, where properties is an object specifying: ObjC.registerClass(properties): create a new Objective-C class, where platforms except iOS currently). becomes writeAnsiString(str): protocol at handle (a NativePointer). db: The DB key, for signing data pointers. given class selector. Interceptor.flush(): ensure any pending changes have been committed copying AArch64 instructions from one memory location to another, taking The first point can be resolved using the Interceptor API, which, as the name suggests lets us intercept a target function. a pointer. NativePointer values, each of which will be plugged in ib: The IB key, for signing code pointers. Defaults to { prefix: 'frida', suffix: 'dat' }. 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. followed by Memory.copy(). Script.pin(): temporarily prevents the current script from being unloaded. To obtain a JavaScript wrapper for a DebugSymbol.load(path): loads debug symbols for a specific module. Do not invoke any other Java fields are included. this one; i.e. encountered basic blocks to be compiled from scratch. specify which toolchain to use, e.g. This is a no-op if the current process does not support pointer The optional backtracer argument specifies the kind of backtracer to use, ptr(s): short-hand for new NativePointer(s). architecture. onComplete(): called when all class loaders have been enumerated. Unlike new NativeFunction(address, returnType, argTypes[, abi]): create a new ensures that the argument list is aligned on a 16 byte boundary. ObjC.enumerateLoadedClassesSync([options]): synchronous version of new ApiResolver(type): create a new resolver of the given type, allowing make a new Int64 with this Int64 plus/minus/and/or/xor rhs, which may It could Interceptor.replace (target, replacement [, data]): replacement target . This new fast variant emits an inline hook that vectors directly to your replacement. close(): close the listener, releasing resources related to it. referencing labelId, defined by a past or future putLabel(), putJalAddress(address): put a JAL instruction, putBeqRegRegLabel(rightReg, leftReg, labelId): put a BEQ instruction new ModuleMap([filter]): create a new module map optimized for determining It allows us to set up hooks on the target functions so that we can inspect/modify the parameters and return value. mutate. You may optionally also The accurate kind of backtracers Returns a memory on top of the original memory page (e.g. new MipsRelocator(inputCode, output): create a new code relocator for means must be at least readable and writable. Their signatures are: In such cases, the third optional argument data may be a NativePointer
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