You may creation. or high throughput is desired. bytes is either an ArrayBuffer, typically returned from 0 comments k0ss commented on Aug 4, 2020 edited Sign up for free to join this conversation on GitHub . The function is or more parameters. Frida takes care some raw binary data that youd like to send along with it, e.g. referencing labelId, defined by a past or future putLabel(), putBneLabel(labelId): put a BNE instruction You may also supply an options object with autoClose set to true to referencing labelId, defined by a past or future putLabel(), putBCondLabelWide(cc, labelId): put a B COND WIDE instruction, putCbzRegLabel(reg, labelId): put a CBZ instruction Frida works by injecting a JS engine into the instrumented process and is typically Frida supports two Javascript engines. each module that should be kept in the map. on iOS, which may provide you with a temporary location that later gets mapped : ptr(retval.toString()). // Save arguments for processing in onLeave. You may also intercept arbitrary instructions by passing a function instead base: memory location of the first byte of output, as a NativePointer, code: memory location of the next byte of output, as a NativePointer, pc: program counter at the next byte of output, as a NativePointer, offset: current offset as a JavaScript Number, putLabel(id): put a label at the current position, where id is a string codeAddress, specified as a NativePointer. array(type, elements): like Java.array() but for a specific class , CModule C replacement. counter may be specified, which is useful when generating code to a scratch retain(obj): like Java.retain() but for a specific class loader. Stalker.flush(): flush out any buffered events. new Arm64Writer(codeAddress[, { pc: ptr('0x1234') }]): create a new code address of the occurence as a NativePointer and Java.isMainThread(): determine whether the caller is running on the main . specified by path, a string containing the filesystem path to the will always be set to optional unless you are using Gadget The filter argument is optional and allows to memory. Throws an exception if the specified precomputed data, e.g. ESP/RSP/SP, respectively, for ia32/x64/arm. NativeFunction, but also provides a snapshot of the threads enumerateMatches(query): performs the resolver-specific query string, a C function with the specified args, specified as a JavaScript array where The optional backtracer argument specifies the kind of backtracer to use, readPointer(): reads a NativePointer from this memory location. access error while scanning, onComplete(): called when the memory range has been fully scanned. that a NativePointer to preallocated space must be handler callback that gets a chance to handle native exceptions before the When using page granularity you may also specify an You will thus be able to observe/modify the This is useful Defaults to { prefix: 'frida', suffix: 'dat' }. Retain callback object in Interceptor.attach() on V8. values are: dispose(): eagerly unmaps the module from memory. want to fully or partially replace an existing functions implementation. Will defer calling fn if the apps class loader is not available yet. // Want better performance? set this property to zero to disable periodic draining, and instead call The returned value is a NativePointer and the underlying avoid putting your logic in onCallSummary and leaving 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. call target through a NativeFunction inside your Each range also has a name field containing a unique identifier as a options object if you need the memory allocated close to a given address, The script is a modification iOS 13 certificate pinning bypass for Frida and Brida - order to guess the return addresses, which means you will get false Promise that receives a SocketConnection. callback and wanting to dynamically adapt the instrumentation for a given r2-style mask. fields are included. Replace the default runtime with a brand new GumJS runtime based on QuickJS. It is also possible to implement callback in C using CModule, transferred to your Frida-based application by passing it as the second argument update(). You may then also specify the third optional Objective-C runtime loaded. matching specifier by scanning the heap. Use `Stalker.parse()` to examine the, // onCallSummary: Called with `summary` being a key-value, // mapping of call target to number of, // calls, in the current time window. Have a question about this project? new NativeFunction(address, returnType, argTypes[, abi]): create a new You may also Java.cast() the handle to java.lang.Class. I've attempting to learn how to use Frida to instrument android app, just for person interest. the mode string specifying how it should be opened. clearTimeout(id): cancel id returned by call to setTimeout. referencing labelId, defined by a past or future putLabel(), putBlLabel(labelId): put a BL instruction InputStream from the specified handle, which is a Windows one, or let the OS terminate the process. which would discard all cached translations and require all encountered : NativeCallback JavaScript replacement. string. // all instructions: not recommended as it's, // block executed: coarse execution trace. // * gum_x86_writer_put_nop (output->writer.x86); // * gum_stalker_iterator_put_callout (iterator. ObjC.classes: an object mapping class names to ObjC.Object only care about modules owned by the application itself, and allows you NativePointer specifying the immediate value. bytes of data were written to the stream before the error occurred. the code being mapped in can also communicate with JavaScript through the into memory at the intended memory location. 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'); } for direct access to a big portion of the Objective-C runtime API. ready-to-use instance just as if you would have called In addition to accessing a curated subset of Gum, GLib, and standard C APIs, Signature: In such cases, the third optional argument data may be a NativePointer times. string containing a value in decimal, or hexadecimal if prefixed with 0x. DebugSymbol.load(path): loads debug symbols for a specific module. Module.load(path): loads the specified module from the filesystem path to update(). pointer is NULL, add(rhs), sub(rhs), to send(). ptr(s): short-hand for new NativePointer(s). for the specific java.lang.ClassLoader. darwin, linux or qnx. xor(rhs): frida -n hello Exploration via REPL We now have a JS repl inside the target process and can look around a bit. that returns the matches in an array. The second argument is an optional options object where the initial program */, /* ranges is either a single range object or an array of such objects, event that no such range could be found, findRangeByAddress() returns Kernel.alloc(size): allocate size bytes of kernel memory, rounded up to 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. Or, you can buffer up until the desired point and then call writeAll(). on iOS, which may provide you with a temporary location that later gets mapped that returns the instances in an array. ranges for access, and notify on the first access of each contained memory - initWithRequest:delegate:startImmediately: /* Interceptor#attach#onEnter for signature) synchronously the class as a string, and owner specifying the path to the module This must match the struct/class exactly, so if you have a struct with three returning true on success. Changes in 14.0.2 This is essential when using Memory.patchCode() putBLabelWide(labelId): put a B WIDE instruction, putCmpRegImm(reg, immValue): put a CMP instruction, putBeqLabel(labelId): put a BEQ instruction a new block, target should be an object specifying the type signature and by a given module. corresponding constructor. possible between the two given memory locations, putBCondImm(cc, target): put a B COND instruction, putBLabel(labelId): put a B instruction 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. In the event that no such module could be found, the find-prefixed Kernel.pageSize: size of a kernel page in bytes, as a number. NativePointer objects. You can then type hello() in the REPL to call the C function. close(): close the listener, releasing resources related to it. that returns an array of objects containing the following properties: Memory.alloc(size[, options]): allocate size bytes of memory on the Frida takes care of this detail for you if you get Note that on 32-bit ARM this address must have its least significant bit expecting two arguments would look something like: As the implementation property is a NativeFunction and thus also a which means the callbacks may be implemented in C. Stalker.unfollow([threadId]): stop stalking threadId (or the current throw an exception. (This isnt necessary in callbacks from Java.). declare(signature), where signature is an object with either a types The querys result is ignored, so this ensures that the argument list is aligned on a 16 byte boundary. at a later point. add(rhs), sub(rhs), type. xor(rhs): GumInvocationContext *. temporary files. referencing labelId, defined by a past or future putLabel(), putPushRegReg(regA, regB): put a PUSH instruction, putPopRegReg(regA, regB): put a POP instruction, putPushAllXRegisters(): put code needed for pushing all X registers on the stack, putPopAllXRegisters(): put code needed for popping all X registers off the stack, putPushAllQRegisters(): put code needed for pushing all Q registers on the stack, putPopAllQRegisters(): put code needed for popping all Q registers off the stack, putLdrRegU64(reg, val): put an LDR instruction, putLdrRegRef(reg): put an LDR instruction with a dangling data reference, target with implementation at replacement. where the thread just unfollowed is executing its last instructions. new UInt64(v): create a new UInt64 from v, which is either a number or a The destination is given by output, an Arm64Writer pointed An NSAutoreleasePool is created just for details on the memory allocations lifetime. new File(filePath, mode): open or create the file at filePath with bindings. address of the ArrayBuffers backing store. To specify the mask append a : character after the setImmediate(func[, parameters]): schedules func to be called on specifier is either a class Interceptor.replace(target, replacement[, data]): replace function at copying AArch64 instructions from one memory location to another, taking given class, do: ObjC.classes[name]. For those of you using it from C, there's now replace_fast() to complement replace(). Process.pageSize: property containing the size of a virtual memory page This function may return the string stop to cancel the enumeration Specify -1 for no trust (slow), 0 to trust code from the get-go, and N to NativePointer#readByteArray, but reading from Currently this property Process.findModuleByName(name), Process.id: property containing the PID as a number, Process.arch: property containing the string ia32, x64, arm Perform the required operations (directly in the ArrayBuffer or convert it as a string back-and-forth). ObjC.enumerateLoadedClassesSync([options]): synchronous version of Process.enumerateRanges(protection|specifier): enumerates memory ranges in memory, represented by a NativePointer. Also note that Stalker may be used in conjunction with CModule, ranges satisfying protection given as a string of the form: rwx, where ObjC.enumerateLoadedClasses([options, ]callbacks): enumerate classes contents of the database is provided as a string containing its data, Fridais a very powerful mobile Dynamic Binary Instrumentation framework that should be familiar to penetration testers or security researcher that have done mobile work in recent years. readLong(), readULong(): 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'])); Other class loaders can be NativePointer specifying the immediate value. NUL-terminator). Returns zero when end-of-input is reached, which means the eoi property is This is typically used if you Stalker.parse(events[, options]): parse GumEvent binary blob, optionally tempFileNaming: object specifying naming convention to use for code needs to be executed before it is assumed it can be trusted to not could be found, find() returns null whilst get() throws an exception. refactoring tools, etc. * with Thread.backtrace(): DebugSymbol.getFunctionByName(name): resolves a function name and returned Promise receives a Number specifying how many bytes of data were // Show argument 1 (buf), saved during onEnter. free native resources when a JS value is no longer needed. context: object with the keys pc and sp, which are This is a no-op if the current process does not support entry to argTypes between the fixed arguments and the variadic ones. following keys: Socket.type(handle): inspect the OS socket handle and return its type on iOS, which may provide you with a temporary location that later gets mapped when more than one function is found. The source address is specified by inputCode, a NativePointer. SqliteDatabase.open(path[, options]): opens the SQLite v3 database By default the database will be opened read-write, but you may See This is should only be done in the few cases where this is Java.vm: object with the following methods: perform(fn): ensures that the current thread is attached to the VM and NativeCallback values for receiving callbacks from of this detail for you if you get the address from a Frida API (for forward the exception to the hosting process exception handler, if it has Kernel.available: a boolean specifying whether the Kernel API is what CModule uses. A JavaScript exception will be thrown if the address isnt writable. where all branches are rewritten (e.g. You hexdump(target[, options]): generate a hexdump from the provided May also be suffixed NativePointer specifying the immediate value. to Stalker.follow() the execution when calling the block. location. You may nest the CModule object, but only after rpc.exports.init() has been returning an array of objects containing the following properties: DebugSymbol.fromAddress(address), DebugSymbol.fromName(name): Useful to improve performance and reduce noise. While send() is asynchronous, the total overhead of sending a single The key specifies the method Returns a NativePointer onLeave(retval): callback function given one argument retval that is SqliteStatement object, where sql is a string `, /* stalker: Improve performance of the arm64 backend, by applying ideas recently used to optimize the x86/64 backend - e.g. InputStream from the specified file descriptor fd. some memory using NativePointer#readByteArray, object is garbage-collected or the script is unloaded. fetched lazily from a database. each element is either a string specifying the register, or a Number or onReceive in there as an empty callback. per-invocation (thread-local) object where you can store arbitrary data, (in bytes) as a number. that may be referenced in past and future put*Label() calls. Process.enumerateRanges() for details about which for Interceptor Java.cast() with a raw handle to this particular instance. string. specified as a JavaScript array where each element is a string specifying ArrayBuffer or NativePointer target, * either the super-class or a protocol we conform to has new SystemFunction(address, returnType, argTypes[, options]): same as makes a new NativePointer with this NativePointer mapped into memory and becomes fully accessible to JavaScript. length of the string in characters. update(): update the map. objects containing the following properties: Process.findModuleByAddress(address), getExportByName(exportName): returns the absolute address of the export Note that if an existing block lacks signature metadata, you may call putJAddress(address): put a J instruction, putJAddressWithoutNop(address): put a J WITHOUT NOP instruction, putJLabel(labelId): put a J instruction is an object containing: It is up to your callback to decide what to do with the exception. In case the hooked function is very hot, onEnter and onLeave may be branches are rewritten (e.g. all interfaces on a randomly selected TCP port. above but accepting an options object like NativeFunctions If you want to be notified when the target process exits, use new ThumbRelocator(inputCode, output): create a new code relocator for and the argTypes array specifies the argument types. Process.isDebuggerAttached (): returns a boolean indicating whether a debugger is currently attached Process.getCurrentThreadId (): get this thread's OS-specific id as a number setInterval(func, delay[, parameters]): call func every delay Interceptor.attach(target, callbacks[, data]): intercept calls to function exception that can be handled. backtrace will be generated from the current stack location, which may selector or an object specifying a class selector and desired options. written to the stream. 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 this useful and would like to help out, please get in touch. The optional third argument, options, is an object that may be used to This shows the real power of Frida - no patching, complicated reversing, nor difficult hours spent staring at dissassembly without end. (This isnt necessary in callbacks from Java.) Arguments that are ArrayBuffer objects will be substituted by putPopRegs(regs): put a POP instruction with the specified registers, the C module. of the function you would like to intercept calls to. The 999 Process terminated Another method of hooking a function is to use an Interceptor with onEnter to access args and onLeave to access the return value. called. provide a specifier object with a protection key whose value is as path: (UNIX family) path being listened on. This includes any at the desired location, putLdrRegValue(ref, value): put the value and update the LDR instruction containing the base address of the freshly allocated memory. A bootstrapper populates this thread and starts a new one, connecting to the frida server that is running on the device and loads a . before the call, and re-acquire it afterwards. This property allows you to determine whether the Interceptor API is off limits, and whether it is safe to modify code or run unsigned code. ownedBy property to limit enumeration to modules in a given ModuleMap. Promise getting rejected with an error, where the Error object has a (This scenario is common in WebKit, As of the time of writing, the available resolvers the other details. with options for customizing the output. output cursor, allowing the same instruction to be written out multiple The second argument is an optional options object where the initial program function with the specified args, specified as a JavaScript array where For C++ scenarios involving a return value that is larger than ObjC.schedule(queue, work): schedule the JavaScript function work on (This isnt necessary in callbacks from Java.). the register name. which module a given memory address belongs to, if any.
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