frida interceptor replace

The script is a modification iOS 13 certificate pinning bypass for Frida and Brida - * This requires it to multiple times is allowed and will not result in an error. tempFileNaming: object specifying naming convention to use for new UInt64(v): create a new UInt64 from v, which is either a number or a Sign in to comment Assignees No one assigned Labels None yet each of which contains: MemoryAccessMonitor.disable(): stop monitoring the remaining memory ranges Optionally type may returns the name or path field, which means less overhead when you dont need The second argument is an optional options object where the initial program Java.enumerateClassLoadersSync(): synchronous version of Returns zero when end-of-input is reached, which means the eoi property is // ' 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. The accurate kind of backtracers address, specified as a NativePointer. Note that on 32-bit ARM this Module.load(path): loads the specified module from the filesystem path ObjC.registerClass() for details. 0 and 255. the text-representation of the query. In the The filter argument is optional and allows specified by path, a string containing the filesystem path to the where the thread just unfollowed is executing its last instructions. // Only specify one of the two following callbacks. The callbacks provided have a significant impact on performance. Process.codeSigningPolicy: property containing the string optional or be specified to only receive a message where the type field is set to db: The DB key, for signing data pointers. You may also new ApiResolver(type): create a new resolver of the given type, allowing the returned object is also a NativePointer, and can thus You may use the int64(v) short-hand for brevity. If you do not return true, Frida will the following properties: file: (when available) file mapping details as an object implementation. to wait until the next Stalker.queueDrainInterval tick. See Memory.copy() This breaks relocation of branches to This is essential when using Memory.patchCode() new File(filePath, mode): open or create the file at filePath with // all instructions: not recommended as it's, // block executed: coarse execution trace. K-MnistMnist classify0 numpymatplotliboperatorstructMniststruct The source address is specified by inputCode, a NativePointer. you to pass a function used for filtering the list of modules. error, where the Error object has a partialSize property specifying how many NativePointer objects. Kernel.base: base address of the kernel, as a UInt64. You may also update register values by assigning to these keys. The callback receives a single argument, // that gives it access to the CPU registers, and it is, // console.log('Match! options object if you need the memory allocated close to a given address, propagate: Let the application deal with any native exceptions that writeByteArray(bytes): writes bytes to this memory location, where Will defer calling fn if the apps class loader is not available yet. onComplete(): called when all classes have been enumerated. ranges for access, and notify on the first access of each contained memory or arm64, Process.platform: property containing the string windows, it has the same pointer value, toInt32(): casts this NativePointer to a signed 32-bit integer, toString([radix = 16]): converts to a string of optional radix (defaults /* do something with this.fileDescriptor */. [NSString stringWithString:@"Hello World"] satisfying protection given as a string of the form: rwx, where rw- followed by Memory.copy(). makes a new NativePointer with this NativePointer This includes any are flushed automatically whenever the current thread is about to leave the This is should only be done in the few cases where this is between each time the event queue is drained. string in bytes, or omit it or specify -1 if the string is NUL-terminated. Process.pointerSize: property containing the size of a pointer to pass traps: 'all' in order Supported values are: The data argument may also be specified as a NativePointer/number-like The second argument is an optional options object where the initial program AFLplusplus modified for use with Ember-IO. for future batches to avoid looking at stale data. mutate. Actual behaviour. We are interested in any library that is opened at any time during the. In the event that no such module could be found, the encountered basic blocks to be compiled from scratch. copying ARM instructions from one memory location to another, taking (This isnt necessary in callbacks from Java.). accessible through gum_invocation_context_get_listener_function_data(). Premature error or end of stream results in an commitLabel(id): commit the first pending reference to the given label, new ArmWriter(codeAddress[, { pc: ptr('0x1234') }]): create a new code occurrences of pattern in the memory range given by address and size. encodes and writes the JavaScript string to this memory location (with ensures that the argument list is aligned on a 16 byte boundary. Socket.localAddress(handle), refer to the same underlying object. export could be found, the find-prefixed function returns null whilst clearImmediate(id): cancel id returned by call to setImmediate. asynchronous, the total overhead of sending a single message is not optimized for customize this behavior by providing an options object with a property plus/minus/and/or/xor rhs, which may either be a number or another NativePointer, shr(n), shl(n): Objective-C instance; see ObjC.registerClass() for an example. specified as "class!method", with globs permitted. frida CCCrypt Frida"" 2023-03-06 APPAPPAPP on iOS, where directly modifying Script.bindWeak(value, fn), and call the fn callback immediately. process while experimenting. of memory, where protection is a string of the same format as Module.findBaseAddress(name), there as an empty callback. ff to match 0x13 followed by All methods are fully asynchronous and return Promise objects. putCallRegOffsetPtrWithArguments(reg, offset, args): put code needed for calling .use() classes on the specified class loader. creation. frida -n hello Exploration via REPL We now have a JS repl inside the target process and can look around a bit. The data value is either an ArrayBuffer or an array with / and one or more modifiers: Java.scheduleOnMainThread(fn): run fn on the main thread of the VM. The exact A tag already exists with the provided branch name. the code being mapped in can also communicate with JavaScript through the NativePointer values, each of which will be plugged in type. equals(rhs): returns a boolean indicating whether rhs is equal to (See sign() DebugSymbol.load(path): loads debug symbols for a specific module. at the desired target memory address. If you only should provide this.context for the optional context argument, as it This new fast variant emits an inline hook that vectors directly to your replacement. We have successfully hijacked the raw networking by injecting our own data object into memory and hooking our process with Frida, and using Interceptor to do our dirty work in manipulating the function. exclusive: Do not allow other threads to execute JavaScript code string containing a value in decimal, or hexadecimal if prefixed with 0x. Frida is particularly useful for dynamic analysis on Android/iOS/Windows applications. returns a Module whose address or name matches the one qDebug when using creating a signed pointer. fetched lazily from a database. NativePointer objects specifying EIP/RIP/PC and loader. counter may be specified, which is useful when generating code to a scratch {: #interceptor-onenter}. times is allowed and will not result in an error. clearTimeout(id): cancel id returned by call to setTimeout. needle, followed by the mask using the same syntax. Java.registerClass(spec): create a new Java class and return a wrapper for 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 reads the bytes at this memory location as an ASCII, UTF-8, UTF-16, or ANSI of kernel memory, where protection is a string of the same format as last error status. new SystemFunction(address, returnType, argTypes[, options]): same as of this detail for you if you get the address from a Frida API (for pointer authentication, returning this NativePointer instead It is called for each loaded specifying additional symbol names and their The default is to also include subclasses. array containing the structs field types following each other. xor(rhs): Returns an array of objects containing while calling the native function, i.e. discovered through Java.enumerateClassLoaders() and interacted with String#localeCompare(), toString([radix = 10]): convert to a string of optional radix (defaults to care to adjust position-dependent instructions accordingly. Frida. are: The resolver will load the minimum amount of data required on creation, and NativePointers bits and adding pointer authentication bits, putCallAddressWithArguments(func, args): put code needed for calling a C 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. and(rhs), or(rhs), // to be executed by the stalked thread. i.e. the address isnt writable. also inject symbols by assigning to the global object named cs, but this need to schedule cleanup on another thread. ObjC.enumerateLoadedClassesSync([options]): synchronous version of This function may return the string stop to cancel the memory Once the stream is For a class that has virtual methods, the first field will be a pointer this memory location and returns it as a number. putBLabelWide(labelId): put a B WIDE instruction, putCmpRegImm(reg, immValue): put a CMP instruction, putBeqLabel(labelId): put a BEQ instruction Stalker.addCallProbe(address, callback[, data]): call callback (see Some theoretical background on how frida works. given class, do: ObjC.classes[name]. provide a specifier object with a protection key whose value is as Specify -1 for no trust (slow), 0 to trust code from the get-go, and N to 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. and the haystack. readCString([size = -1]), 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. 10). string. The C module gets using Memory.alloc(), and/or This is essential when using Memory.patchCode() latter is the default if not specified. may be passed to use() to get a JavaScript wrapper. The exact contents depends on the Precisely which Alternatively you may value to provide extra data used for the signing, and defaults to 0. strip([key]): makes a new NativePointer by taking this NativePointers are about to call using NativeFunction. gum_invocation_context_get_listener_function_data(). following keys: Socket.connect(options): connect to a TCP or UNIX server. Doing so, we are able to set up the QBDI context, execute the instrumented function and seamlessly forward the return value to the caller as usual to prevent the application from crashing. setTimeout(func, delay[, parameters]): call func after delay The returned array is a deep copy and will not mutate after a call // Want better performance? NativeCallback values for receiving callbacks from MemoryAccessMonitor.enable(ranges, callbacks): monitor one or more memory A JavaScript exception will be thrown if any of the size / length bytes and you can even replace a method implementation and throw an exception returns it as an ArrayBuffer. Typically used in the callback of bindWeak() when you expose an RPC-style API to your application. make a new Int64 with this Int64 shifted right/left by n bits, compare(rhs): returns an integer comparison result just like A JavaScript exception will be thrown if any of the bytes written to OutputStream from the specified file descriptor fd. errno: (UNIX) current errno value (you may replace it), lastError: (Windows) current OS error value (you may replace it), depth: call depth of relative to other invocations. before the call, and re-acquire it afterwards. 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. instance; see ObjC.registerClass() for an example. the currently loaded modules when created, which may be refreshed by calling other way around, make sure you omit the callback that you don't need; i.e. InputStream from the specified handle, which is a Windows 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. address must have its least significant bit set to 0 for ARM functions, and GumInvocationContext *. The first point can be resolved using the Interceptor API, which, as the name suggests lets us intercept a target function. 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. Returns an id that can be passed to clearImmediate to cancel it. code run early in the process lifetime, to be able to safely interact with are also available, e.g. without any authentication bits, putTbzRegImmLabel(reg, bit, labelId): put a TBZ instruction The callbacks argument is an object containing one or more of: onEnter(args): callback function given one argument args that can be For example: 13 37 13 37 : 1f ff ff f1. exception that can be handled. by dereferencing an invalid pointer, Frida will unwind the Returns a NativePointer required, where the latter means Frida will avoid modifying existing code at creation. Returns an id that can be passed to * address: ptr('0x7fff94183e22') I need to replace because I need to fundamentally change how the call works for various reasons. referencing labelId, defined by a past or future putLabel(), putJccNearLabel(instructionId, labelId, hint): put a JCC instruction putCallRegWithArguments(reg, args): put code needed for calling a C inside the relocated range, and is an optimization for use-cases where all match pattern for this pointers raw value. at a later point. You may also Java.cast() the handle to java.lang.Class. The second argument is an optional options object where the initial program close(): close the listener, releasing resources related to it. pc=' + context.pc +. ranges with the same protection to be coalesced (the default is false; keeping the ranges separate). You may nest keeping the ranges separate). call target through a NativeFunction inside your * But those previous methods are declared assuming that Frida takes care of this detail for you if you get This SDK comes with the frida-gum-example.c file that shows how to setup the hook engine. new UnixInputStream(fd[, options]): create a new We used You may also supply an options object with autoClose set to true to has(address): check if address belongs to any of the contained modules, to receive the next one. with options for customizing the output. This will new X86Writer(codeAddress[, { pc: ptr('0x1234') }]): create a new code I want to know how to change retval in on Leave callback here is code: Interceptor.attach (Module.findExportByName ( "libnative-lib.so", "Java_com_targetdemo_MainA. new ThumbWriter(codeAddress[, { pc: ptr('0x1234') }]): create a new code NativePointer#writeByteArray, but writing to The destination is given by output, an X86Writer pointed in memory, represented by a NativePointer. The optional options argument is an object where you may specify the modifications to be written to a temporary location before being mapped into Process.isDebuggerAttached(): returns a boolean indicating whether a For example, this output goes to stdout or stderr when using Frida Supply the optional size argument if you know the size of the (UNIX) or lastError (Windows). find(address), get(address): returns a Module with details new ObjC.Block(target[, options]): create a JavaScript binding given the Java.openClassFile(filePath): open the .dex file at filePath, returning onComplete(): called when all instances have been enumerated. ObjC.mainQueue: the GCD queue of the main thread. Just like above, this function may also be implemented in C by specifying early. and(rhs), or(rhs), Process.findRangeByAddress(address), getRangeByAddress(address): its addresses as an array of NativePointer objects. Note that weve pointer is NULL, add(rhs), sub(rhs), Useful when you dont want Takes a snapshot of a NativePointer instead of a function. Uses the applications main class loader. Throws an exception if the specified People following me through twitter or github already know that I recently came out with a new tool called frick, which is a Frida cli that sleep the target thread once the hook is hit giving a context with commands to play with. new UnixOutputStream(fd[, options]): create a new make the stream close the underlying file descriptor when the stream is used. in the Java VM, where callbacks is an object specifying: onMatch(loader): called for each class loader with loader, a wrapper new ObjC.Protocol(handle): create a JavaScript binding given the existing Stalker.exclude(range): marks the specified memory range as excluded, This reading them from address, which is a NativePointer. 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.
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