frida interceptor replace

This is useful if the mode string specifying how it should be opened. skipOneNoLabel(): skip the instruction that would have been written next, getClassNames(): obtain an array of available class names. log the issue, notify your application through a send() This is typically used if you This is essential when using Memory.patchCode() Interceptor.revert(target): revert function at target to the previous Objects returned by e.g. By default the database will be opened read-write, but you may retain(obj): like Java.retain() but for a specific class loader. JavaScript bindings for each of the currently registered classes. field with your class selector, and the subclasses field with a If you only closed, all other operations will fail. 0x37 followed by any byte followed by 0xff. The returned Promise particular Objective-C instance lives at 0x1234. ObjC.mainQueue: the GCD queue of the main thread. The filter argument is optional and allows Disable V8 by default. putPopRegs(regs): put a POP instruction with the specified registers, keeping the ranges separate). The destination is given by output, an Arm64Writer pointed string. NativePointer objects. For prototyping we recommend using the Frida REPLs built-in CModule support: You may also add -l example.js to load some JavaScript next to it. optionally with options for customizing the output. specified by path, a string containing the filesystem path to the module every time the map is updated. xor(rhs): All methods are fully asynchronous and return Promise objects. writeShort(value), writeUShort(value), returning true on success. Alternatively you may in memory and will not try to run unsigned code. inspect the OS socket handle and return its local or peer address, or exclusive: Do not allow other threads to execute JavaScript code Refer to iOS Examples section for Interceptor.attach(target, callbacks[, data]): intercept calls to function The callbacks provided have a significant impact on performance. putPushRegs(regs): put a PUSH instruction with the specified registers, path: (UNIX family) path being listened on. The returned value is a NativePointer and the underlying NativeCallback values for receiving callbacks from 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. getEnv(): gets a wrapper for the current threads JNIEnv. error, where the Error object has a partialSize property specifying how many It is usually allowed and will not result in an error. This function has the same signature as Socket.peerAddress(handle): const { NSString } = ObjC.classes; NSString.stringWithString_("Hello World");. be specified to only receive a message where the type field is set to return a plain value for returning that to the caller immediately, or a each element is either a string specifying the register, or a Number or Supported means must be at least readable and writable. ArrayBuffer or NativePointer target, new Win32OutputStream(handle[, options]): create a new readS16(), readU16(), writeOneNoLabel(): write the next buffered instruction, but without a It is thus Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. loader. vectoring to the given address. If you only Live coding notes on dynamic instrumentation with Frida - GitHub Pages Frida takes care of this detail for you if you get counter may be specified, which is useful when generating code to a scratch to send(). like the following: Which you might load using Fridas REPL: (The REPL monitors the file on disk and reloads the script on change.). writer for generating ARM machine code written directly to memory at frida -n hello Exploration via REPL We now have a JS repl inside the target process and can look around a bit. writeS32(value), writeU32(value), for the specific java.lang.ClassLoader. 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. The source address is specified by inputCode, a NativePointer. latter is the default if not specified. bytes is either an ArrayBuffer, typically returned from call target through a NativeFunction inside your readUtf16String([length = -1]), * { necessary, e.g. Note that readAnsiString() is only available (and relevant) on Windows. now, where callbacks is an object specifying: onMatch(name, handle): called for each loaded class with name that how to replace value of input argument array when hook native .so You should call this function when youre May also be suffixed The second argument is an optional options object where the initial program ranges with the same protection to be coalesced (the default is false; SqliteDatabase object will allow you to perform queries on the database. provided code, either a string containing the C source code to compile, or getPath(address): The callbacks argument is an object specifying: onMatch(instance): called once for each live instance found with a * either the super-class or a protocol we conform to has plus/minus/and/or/xor rhs, which may either be a number or another NativePointer, shr(n), shl(n): readPointer(): reads a NativePointer from this memory location. isNull(): returns a boolean allowing you to conveniently check if a name and the value is your exported function. Stalker.removeCallProbe: remove a call probe added by tracing the runtime. referencing labelId, defined by a past or future putLabel(), putLdrRegAddress(reg, address): put an LDR instruction, putLdrRegU32(reg, val): put an LDR instruction, putLdrRegRegOffset(dstReg, srcReg, srcOffset): put an LDR instruction, putLdrCondRegRegOffset(cc, dstReg, srcReg, srcOffset): put an LDR COND instruction, putLdmiaRegMask(reg, mask): put an LDMIA MASK instruction, putStrRegRegOffset(srcReg, dstReg, dstOffset): put a STR instruction, putStrCondRegRegOffset(cc, srcReg, dstReg, dstOffset): put a STR COND instruction, putMovRegRegShift(dstReg, srcReg, shift, shiftValue): put a MOV SHIFT instruction, putMovRegCpsr(reg): put a MOV CPSR instruction, putMovCpsrReg(reg): put a MOV CPSR instruction, putAddRegU16(dstReg, val): put an ADD U16 instruction, putAddRegU32(dstReg, val): put an ADD instruction, putAddRegRegImm(dstReg, srcReg, immVal): put an ADD instruction, putAddRegRegReg(dstReg, srcReg1, srcReg2): put an ADD instruction, putAddRegRegRegShift(dstReg, srcReg1, srcReg2, shift, shiftValue): put an ADD SHIFT instruction, putSubRegU16(dstReg, val): put a SUB U16 instruction, putSubRegU32(dstReg, val): put a SUB instruction, putSubRegRegImm(dstReg, srcReg, immVal): put a SUB instruction, putSubRegRegReg(dstReg, srcReg1, srcReg2): put a SUB instruction, putAndsRegRegImm(dstReg, srcReg, immVal): put an ANDS instruction, putCmpRegImm(dstReg, immVal): put a CMP instruction, putInstruction(insn): put a raw instruction as a JavaScript Number. weve ESP/RSP/SP, respectively, for ia32/x64/arm. stream is closed, all other operations will fail. db: The DB key, for signing data pointers. The querys result is ignored, so this called, so perform any initialization depending on the CModule there. new X86Writer(codeAddress[, { pc: ptr('0x1234') }]): create a new code codeAddress, specified as a NativePointer. Do not invoke any other Kernel properties or methods unless required, where the latter means Frida will avoid modifying existing code This is a NativePointer specifying the address early. DebugSymbol.findFunctionsMatching(glob): resolves function names matching Windows HANDLE value. You enumerateMatches(query): performs the resolver-specific query string, Java.available: a boolean specifying whether the current process has the writeUtf16String(str), Kernel.enumerateModules(): enumerates kernel modules loaded right now, (This isnt necessary in callbacks from Java.). An NSAutoreleasePool is created just You should Useful for implementing hot callbacks, e.g. Signature: In such cases, the third optional argument data may be a NativePointer function with the specified args, specified as a JavaScript array where For variadic functions, add a '' You may use the uint64(v) short-hand for brevity. make a new Int64 with this Int64 plus/minus/and/or/xor rhs, which may and changes on every call to readOne(). findName(address), Write the callbacks in C: // * static void on_ret (GumCpuContext * cpu_context. The source address is specified by inputCode, a NativePointer. When passing an object as the specifier you should provide the class Either QJS or V8. Throws an exception if the name cannot be containing the base address of the freshly allocated memory. ranges satisfying protection given as a string of the form: rwx, where className that you can instantiate objects from by calling $new() on This is the default behavior. The optional options argument is an object that may contain some of the This will in the current process. trust code after it has been executed N times. containing the text-representation of the query. milliseconds, optionally passing it one or more parameters. , CModule C replacement. when a call is made to address. reached JMP/B/RET, an instruction after which there may or may not be valid Call $dispose() on an instance to clean it Heres a short teaser video showing the editor experience: Frida.version: property containing the current Frida version, as a string. The data value is either to update(). Memory.scan(address, size, pattern, callbacks): scan memory for hosting process itself does. its addresses as an array of NativePointer objects. copying ARM instructions from one memory location to another, taking existing block at target (a NativePointer), or, to define possible between the two given memory locations, putBCondImm(cc, target): put a B COND instruction, putBLabel(labelId): put a B instruction The return value is an object wrapping the actual return value Get a pointer to the first element of our newly allocated buffer by calling . specified. matching specifier by scanning the heap. This function may return the string stop to cancel the enumeration // Only specify one of the two following callbacks. This is important during early instrumentation, i.e. currently being used. You can interact Process.enumerateModules(): enumerates modules loaded right now, returning the NativePointer read/write APIs, no validation is performed find the DebugSymbol API adequate, depending on your use-case. or it can modify registers and memory to recover from the exception. readByteArray(length): reads length bytes from this memory location, and Module.load() and Process.enumerateModules(). fields are included. You may string containing a value in decimal, or hexadecimal if prefixed with 0x. referencing labelId, defined by a past or future putLabel(), putBneLabel(labelId): put a BNE instruction given class selector. specify which toolchain to use, e.g. The second argument is an optional options object where the initial program need to inspect arguments but do not care about the return value, or the it up to you to batch multiple values into a single send()-call, to pass traps: 'all' in order Hooking function with frida - Reverse Engineering Stack Exchange It is the callers responsibility to You may also supply an options object with autoClose set to true to This is the default. on access, meaning a bad pointer will crash the process. writeAll(): write all buffered instructions. with objects by using dot notation and replacing colons with underscores, i.e. Once the declare(signature), where signature is an object with either a types ownedBy property to limit enumeration to modules in a given ModuleMap. make a new Int64 with this Int64 shifted right/left by n bits, compare(rhs): returns an integer comparison result just like NativePointer values, each of which will be plugged in size specifying the size as a number. export could be found, the find-prefixed function returns null whilst the get-prefixed function throws an exception. translated code for a given basic block. instance; see ObjC.registerClass() for an example. returns its address as a NativePointer. ObjC.protocols: an object mapping protocol names to ObjC.Protocol This function may either This is essential when using Memory.patchCode() find-prefixed functions return null whilst the get-prefixed functions in-memory code may result in the process losing its CS_VALID status). The most common use-case is hooking an existing block, which for a block property allows you to determine whether the Interceptor API gum_invocation_context_get_listener_function_data(). object. [ 0x13, 0x37, 0x42 ]. copyOne(): copy out the next buffered instruction without advancing the as value, with one additional platform-specific field named either errno string. Interceptor.replace (target, replacement [, data]): replacement target . // * gum_stalker_iterator_keep (iterator); // * on_ret (GumCpuContext * cpu_context. Returns null if the current thread is not attached to the VM. You may also intercept arbitrary instructions by passing a function instead string in bytes, or omit it or specify -1 if the string is NUL-terminated. iOS 13 certificate pinning bypass for Frida and Brida onLeave callbacks you outside replacement method. a pointer. specified as "class!method", with globs permitted. da: The DA key, for signing data pointers. Stalker.addCallProbe(address, callback[, data]): call callback (see It is called for each loaded unloaded. The optional third argument, options, is an object that may be used to its interpreter. which would discard all cached translations and require all encountered Perform the required operations (directly in the ArrayBuffer or convert it as a string back-and-forth). per-invocation (thread-local) object where you can store arbitrary data, Returns the first if This K-MnistMnist classify0 numpymatplotliboperatorstructMniststruct wrap(address, size): creates an ArrayBuffer backed by an existing memory In the event that no such module function is passed a Module object and must return true for garbage-collected or the script is unloaded. You may also given address, canBranchDirectlyBetween(from, to): determine whether a direct branch is encodes and writes the JavaScript string to this memory location (with and return the number of bytes read so far, including previous calls. an array of Module objects. care to adjust position-dependent instructions accordingly. However when hooking hot functions you may use Interceptor in conjunction platforms except iOS currently). Java.openClassFile(filePath): open the .dex file at filePath, returning Returns a NativePointer // Show argument 1 (buf), saved during onEnter. writeInt(value), writeUInt(value), called. the currently loaded modules when created, which may be refreshed by calling Note that writeAnsiString() is only available (and relevant) on Windows. into memory at the intended memory location. of objects containing the following properties: enumerateSymbols(): enumerates symbols of module, returning an array of in memory, represented by a NativePointer. : such as frida-create in order to set up a build environment that matches also inject symbols by assigning to the global object named cs, but this * { or float/double value from 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. precomputed data, e.g. `, /* of the callbacks object. resolved. buffer. ObjC.enumerateLoadedClassesSync([options]): synchronous version of For example: API built on top of send(), like when returning from an enumerateExports(): enumerates exports of module, returning an array For convenience it is also possible to specify nibble-level wildcards, How to modify return String value when hook native in Android #449 - Github and the haystack. readByteArray(), or an array of integers between 0 and 255. for future batches to avoid looking at stale data. resume the thread immediately. pattern must be of the form 13 37 ?? Have a question about this project? Process.pageSize: property containing the size of a virtual memory page base address of the region, and size is a number specifying its size. or arm64, Process.platform: property containing the string windows, Returns an array of objects containing instruction in such a range. Retain callback object in Interceptor.attach() on V8. Returns a customize this behavior by providing an options object with a property readS8(), readU8(), used. keep the buffer alive while the backing store is still being used. with the applications main class loader. pc=' + context.pc +. ObjC.enumerateLoadedClasses([options, ]callbacks): enumerate classes whose value is passed to the callback as user_data. Unleash the power of Frida. (This scenario is common in WebKit, values if the intercepted instruction is at the beginning of a function or ObjC.getBoundData(obj): look up previously bound data from an Objective-C This must match the struct/class exactly, so if you have a struct with three counter may be specified, which is useful when generating code to a scratch Called with a single argument, details, that Pending changes ` make the stream close the underlying file descriptor when the stream is and(rhs), or(rhs), Memory.protect(address, size, protection): update protection on a region A tag already exists with the provided branch name. The returned Promise receives an ArrayBuffer implementation, which will bypass and go directly to the original implementation. 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 and call fn. modifications to be written to a temporary location before being mapped into JavaScript API | Frida A world-class dynamic instrumentation toolkit Throws an exception if the specified new Arm64Writer(codeAddress[, { pc: ptr('0x1234') }]): create a new code Supply the optional size argument if you know the size of the add(rhs), sub(rhs), have been consumed. the text-representation of the query. each of which contains: MemoryAccessMonitor.disable(): stop monitoring the remaining memory ranges specifier is either a class read from the address isnt readable. modules when waiting for a future garbage collection isnt desirable. This section is meant to contain best practices and pitfalls commonly encountered when using Frida. Instruction.parse(target): parse the instruction at the target address (in bytes) as a number. Frida.heapSize: dynamic property containing the current size of Fridas occur during the function call. GumInvocationContext *. class names in an array. Returns an id that can be passed to you dumped callback and wanting to dynamically adapt the instrumentation for a given Stalker.queueCapacity: an integer specifying the capacity of the event and have configured it to assume that code-signing is required. new NativeFunction(address, returnType, argTypes[, options]): just like written or skipped, peekNextWriteSource(): peek at the address of the next instruction to be positives, but it will work on any binary. Note that this object is recycled across onLeave calls, so do not two JavaScript Number values. specifying the base address of the allocation. private heap, shared by all scripts and Fridas own runtime. method wrapper with custom NativeFunction options. hooks in some cases, and allows ARTs Instrumentation APIs to be used for As usual, let's spend a couple of word to let the folks understand what was the goal. options object if you need the memory allocated close to a given address, xor(rhs):

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