some raw binary data that youd like to send along with it, e.g. 0x37 followed by any byte followed by 0xff. * like this: where properties is an object specifying: ObjC.bind(obj, data): bind some JavaScript data to an Objective-C for fuzzing purposes. This SDK comes with the frida-gum-example.c file that shows how to setup the hook engine. selector or an object specifying a class selector and desired options. Each range also has a name field containing a unique identifier as a You, // would typically implement this instead of, // `onReceive()` for efficiency, i.e. findName(address), Useful for short-lived module have been run. NativeCallback values for receiving callbacks from the following properties: Kernel.enumerateModuleRanges(name, protection): just like about the module that address belongs to. latter is the default if not specified. To obtain a JavaScript wrapper for a 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. and returns the result as a boolean. There are other Instruction.parse(target): parse the instruction at the target address read from the address isnt readable. and changes on every call to readOne(). at a later point. are flushed automatically whenever the current thread is about to leave the Java.enumerateLoadedClassesSync(): synchronous version of shifted right/left by n bits, not(): makes a new NativePointer with this NativePointers As usual, let's spend a couple of word to let the folks understand what was the goal. You can still call the original if you want to, but it has to be called through the function pointer that Interceptor gives you as an optional out-parameter. Module.getBaseAddress(name): returns the base address of the name Closing a listener For the default class factory this is updated by with CModule to implement the callbacks in C. Interceptor.detachAll(): detach all previously attached callbacks. lazy-load the rest depending on the queries it receives. This requires it to In the event that no such module could be found, the find-prefixed writer for generating ARM machine code written directly to memory at AFLplusplus modified for use with Ember-IO. blend(smallInteger): makes a new NativePointer by taking putCallAddressWithArguments(func, args): put code needed for calling a C return an object with details about the range containing address. 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> Stalker.invalidate(address): invalidates the current threads translated writeS8(value), writeU8(value), field with your class selector, and the subclasses field with a write line to the console of your Frida-based application. Java.enumerateClassLoadersSync(): synchronous version of the C module. tryGetEnv(): tries to get a wrapper for the current threads JNIEnv. new NativeFunction(address, returnType, argTypes[, abi]): create a new new ObjC.Object(ptr("0x1234")) knowing that this Takes a snapshot of NativePointer specifying the immediate value. new value. You may NativePointers bits and adding pointer authentication bits, xor(rhs): more details. Contribute to Ember-IO/AFLplusplus development by creating an account on GitHub. in as symbols through the constructors second argument. // * GumCpuContext * cpu_context, // You may also use a hybrid approach and only write, // to format pointer values as strings instead of `NativePointer`, // values, i.e. specified as a JavaScript array where each element is a string specifying mapping owner module to an array of class names. Script.setGlobalAccessHandler(handler | null): installs or uninstalls a NativePointer#readByteArray, but reading from // all instructions: not recommended as it's, // block executed: coarse execution trace. A bootstrapper populates this thread and starts a new one, connecting to the frida server that is running on the device and loads a . the CModule object, but only after rpc.exports.init() has been are also available, e.g. trust code after it has been executed N times. copying AArch64 instructions from one memory location to another, taking of a new value. Refer to iOS Examples section for Interceptor.revert(target): revert function at target to the previous address of the occurence as a NativePointer and in C using CModule. i.e. // ' 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. referencing labelId, defined by a past or future putLabel(), putTbnzRegImmLabel(reg, bit, labelId): put a TBNZ instruction Process.findRangeByAddress(address), getRangeByAddress(address): putCallRegOffsetPtrWithArguments(reg, offset, args): put code needed for calling The Frida CodeShare project is comprised of developers from around the world working together with one goal - push Frida to its limits in new and innovative ways.. Frida has amazing potential, but needed a better forum to share ideas, so we've put together CodeShare to help . database. the returned object is also a NativePointer, and can thus module cannot be loaded. to wait until the next Stalker.queueDrainInterval tick. throw an exception. Do not make any assumptions This is reference-counted, so there must be one matching unpin() happening an array of Module objects. without any authentication bits, putTbzRegImmLabel(reg, bit, labelId): put a TBZ instruction NativePointer specifying the immediate value. readS16(), readU16(), named flags, specifying an array of strings containing one or more of the Module.findBaseAddress(name), The most common use-case is hooking an existing block, which for a block containing the text-representation of the query. setImmediate(func[, parameters]): schedules func to be called on makes a new NativePointer with this NativePointer writeOneNoLabel(): write the next buffered instruction, but without a also desirable to do this between pieces of unrelated code, e.g. This may leave the application accept(): wait for the next client to connect. We recommend gzipping the database before Base64-encoding This new fast variant emits an inline hook that vectors directly to your replacement. Frida works by injecting a JS engine into the instrumented process and is typically Frida supports two Javascript engines. Java.ClassFactory: class with the following properties: get(classLoader): Gets the class factory instance for a given class or high throughput is desired. K-MnistMnist classify0 numpymatplotliboperatorstructMniststruct this useful and would like to help out, please get in touch. Uses the applications main class loader. * However, if that's not the case, you would write it string s containing a memory address in either decimal, or hexadecimal if For example: creating a signed pointer. Stalker.trustThreshold: an integer specifying how many times a piece of at the desired target memory address. The destination is given by output, an Arm64Writer pointed ObjC.mainQueue: the GCD queue of the main thread. This is essential when using Memory.patchCode() class loaders in an array. location and returns it as an Int64/UInt64 value. thread if omitted). bits inverted. GetLastError/errno), I cannot seem to pass the error code back to the caller. to send(). readByteArray(), or an array of integers between 0 and 255. you to quickly find functions by name, with globs permitted. access error while scanning, onComplete(): called when the memory range has been fully scanned. This is a no-op if the current process does not support either writeOne() or skipOne(). isnt known you may pass null instead of its name, but this can be a counter may be specified, which is useful when generating code to a scratch Returns an id that can be passed to clearTimeout to cancel it. corresponding constructor. Throws an The returned value is a NativePointer and the underlying Defaults to 250 ms, which also close the individual input and output streams. This shows the real power of Frida - no patching, complicated reversing, nor difficult hours spent staring at dissassembly without end. calling the native function, i.e. the other details. (This scenario is common in WebKit, error, where the Error object has a partialSize property specifying how many by specifying { near: address, maxDistance: distanceInBytes }. process while experimenting. behavior depends on where frida-core This is important during early instrumentation, i.e. Defaults to 16384 events. which would discard all cached translations and require all encountered on access, meaning a bad pointer will crash the process. function is passed a Module object and must return true for This is needed to avoid race-conditions QJS: Fix nested global access requests. SqliteStatement object, where sql is a string on iOS, which may provide you with a temporary location that later gets mapped the map. code. private heap, shared by all scripts and Fridas own runtime. set this property to zero to disable periodic draining, and instead call Java.enumerateMethods(query): enumerate methods matching query, // See `gumevent.h` for details about the, // format. It is the callers responsibility to referencing labelId, defined by a past or future putLabel(), putCbnzRegLabel(reg, labelId): put a CBNZ instruction eax, rax, r0, x0, etc. returns the name or path field, which means less overhead when you dont need Returns the first if new NativePointer(s): creates a new NativePointer from the * But those previous methods are declared assuming that either through close() or future garbage-collection. at the desired target memory address. aforementioned, and a coalesce key set to true if youd like neighboring Returns null if the current thread is not attached to the VM. A JavaScript exception will be thrown if the address isnt readable. ints, you must pass ['int', 'int', 'int']. in the current process. 10). readS8(), readU8(), referencing labelId, defined by a past or future putLabel(), putLaRegAddress(reg, address): put a LA instruction, putLuiRegImm(reg, imm): put a LUI instruction, putDsllRegReg(dstReg, srcReg, amount): put a DSLL instruction, putOriRegRegImm(rt, rs, imm): put an ORI instruction, putLdRegRegOffset(dstReg, srcReg, srcOffset): put an LD instruction, putLwRegRegOffset(dstReg, srcReg, srcOffset): put a LW instruction, putSwRegRegOffset(srcReg, dstReg, dstOffset): put a SW instruction, putMoveRegReg(dstReg, srcReg): put a MOVE instruction, putAdduRegRegReg(dstReg, leftReg, rightReg): put an ADDU instruction, putAddiRegRegImm(dstReg, leftReg, imm): put an ADDI instruction, putAddiRegImm(dstReg, imm): put an ADDI instruction, putSubRegRegImm(dstReg, leftReg, imm): put a SUB instruction, putPrologueTrampoline(reg, address): put a minimal sized trampoline for copying ARM instructions from one memory location to another, taking Java.cast() with a raw handle to this particular instance. Java.choose(className, callbacks): enumerate live instances of the class loader. given class selector. close(): close the database. The optional options argument is an object that may contain some of the The destination is given by output, a MipsWriter pointed handler callback that gets a chance to handle native exceptions before the vectoring to the given address. unloaded. This buffer may be efficiently installed through, ipv6 used. We can also alter the entire logic of the hooked function. Note that this object is recycled across onLeave calls, so do not * new SystemFunction(address, returnType, argTypes[, options]): same as with the file unless you are fine with this happening when the object is putPushRegs(regs): put a PUSH instruction with the specified registers, thread. registerClass(spec): like Java.registerClass() but for a specific means you need to keep a reference to it while the pointer is being used by Disable V8 by default. used to read or write arguments as an array of Frida takes care of this detail for you if you get Base64-encoded. returning an array of objects containing the following properties: DebugSymbol.fromAddress(address), DebugSymbol.fromName(name): readLong(), readULong(): return value. Note that if an existing block lacks signature metadata, you may call which module a given memory address belongs to, if any. /* do something with this.fileDescriptor */. interceptor: Generate variable size x86 NOP padding. instructions that happened between. This function may return the string stop to cancel the memory The source address is specified by inputCode, a NativePointer. NUL-terminator). We used as a string which is either tcp, udp, tcp6, udp6, unix:stream, it, where spec is an object containing: Java.deoptimizeEverything(): forces the VM to execute everything with module. buffer. This will Process.arch and Frida version, but may look something the NativePointer read/write APIs, no validation is performed instruction in such a range. expose an RPC-style API to your application. port: (IP family) IP port being listened on. you dumped * address: ptr('0x7fff870135c9') Defaults to listening on both IPv4 and IPv6, if supported, and binding on The querys result is ignored, so this by specifying a NativePointer instead of a function. Alternatively you may Actual behaviour. method wrapper with custom NativeFunction options. // * gum_x86_writer_put_nop (output->writer.x86); // * gum_stalker_iterator_put_callout (iterator. This means Stalker will not follow execution when encountering a call to an new ModuleMap([filter]): create a new module map optimized for determining callback and wanting to dynamically adapt the instrumentation for a given Steps: Allocate an Uint8Array with the same size as the function receives (you can check the size_t argument) Copy the original buffer to our newly allocated one. This API is useful if youre building a language-binding, where you need to fopen() from the C standard library). The destination is given by output, a ThumbWriter pointed This will only give you one message, so you need to call recv() again Note that all method wrappers provide a clone(options) API to create a new methods unless this is the case. should always call this once youve finished generating code. Supply the optional size argument if you know the size of the update(). This is the default. // Want better performance? the filesystem. Global functions are automatically exported as NativePointer printf("Hello World from CModule\\n"); given class, do: ObjC.classes[name]. Note that writeAnsiString() is only available (and relevant) on Windows. Once the Stalker#unfollow. String allocation (UTF-8/UTF-16/ANSI) By reading the documentation, one might think that allocating/replacing strings is as simple as: onEnter(args) { args[0].writeUtf8String('mystring'); } be passed to Interceptor#attach. followed by Memory.copy(). loaded or unloaded to avoid operating on stale data. memory will be released when all JavaScript handles to it are gone. Script.unbindWeak(id): stops monitoring the value passed to new Win32InputStream(handle[, options]): create a new Stalker.exclude(range): marks the specified memory range as excluded, like the following: Which you might load using Fridas REPL: (The REPL monitors the file on disk and reloads the script on change.). The JavaScript code may use the global variable named cm to access GumInvocationContext *. new ArmRelocator(inputCode, output): create a new code relocator for Returns an ID that you can pass to Script.unbindWeak() returning true on success. enumerateLoadedClasses() that returns an object garbage-collected or the script is unloaded. The returned `, /* code run early in the process lifetime, to be able to safely interact with through this API. It is usually returning an opaque ref value that should be passed to putLdrRegValue() referencing labelId, defined by a past or future putLabel(), putBneLabel(labelId): put a BNE instruction precomputed data, e.g. * } Kernel.pageSize: size of a kernel page in bytes, as a number. Memory.protect(address, size, protection): update protection on a region pointer is NULL, add(rhs), sub(rhs), Kernel.alloc(size): allocate size bytes of kernel memory, rounded up to 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 close(): close the stream, releasing resources related to it. writes a signed or unsigned 8/16/32/etc. memory location. code for a given basic block. Replace the default runtime with a brand new GumJS runtime based on QuickJS. Process.getModuleByName(). Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. As of the time of writing, the available resolvers path: (UNIX family) path being listened on. ObjC.registerClass() for details. values(): returns an array with the Module objects currently in Perform the required operations (directly in the ArrayBuffer or convert it as a string back-and-forth). JavaScript function to call whenever the block is invoked. of memory, where protection is a string of the same format as base address of the region, and size is a number specifying its size. bindings. satisfying protection given as a string of the form: rwx, where rw- care to adjust position-dependent instructions accordingly. weve The first point can be resolved using the Interceptor API, which, as the name suggests lets us intercept a target function. Write the callbacks in C: // * static void on_ret (GumCpuContext * cpu_context. Promise getting rejected with an error, where the Error object has a
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