├── .gitignore ├── LICENSE ├── Makefile ├── README.md ├── control ├── entitlements.plist ├── jb-detect-bypass ├── Makefile ├── jb-detect-bypass.plist ├── logging.h └── main.m ├── layout ├── DEBIAN │ ├── postinst │ └── postrm └── Library │ └── LaunchDaemons │ └── com.jb-detect-bypass.applaunchmond.plist └── main.m /.gitignore: -------------------------------------------------------------------------------- 1 | .DS_Store 2 | *.xcuserstate 3 | /.theos 4 | /packages 5 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU AFFERO GENERAL PUBLIC LICENSE 2 | Version 3, 19 November 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU Affero General Public License is a free, copyleft license for 11 | software and other kinds of works, specifically designed to ensure 12 | cooperation with the community in the case of network server software. 13 | 14 | The licenses for most software and other practical works are designed 15 | to take away your freedom to share and change the works. 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It is safest 628 | to attach them to the start of each source file to most effectively 629 | state the exclusion of warranty; and each file should have at least 630 | the "copyright" line and a pointer to where the full notice is found. 631 | 632 | 633 | Copyright (C) 634 | 635 | This program is free software: you can redistribute it and/or modify 636 | it under the terms of the GNU Affero General Public License as published 637 | by the Free Software Foundation, either version 3 of the License, or 638 | (at your option) any later version. 639 | 640 | This program is distributed in the hope that it will be useful, 641 | but WITHOUT ANY WARRANTY; without even the implied warranty of 642 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 643 | GNU Affero General Public License for more details. 644 | 645 | You should have received a copy of the GNU Affero General Public License 646 | along with this program. If not, see . 647 | 648 | Also add information on how to contact you by electronic and paper mail. 649 | 650 | If your software can interact with users remotely through a computer 651 | network, you should also make sure that it provides a way for users to 652 | get its source. For example, if your program is a web application, its 653 | interface could display a "Source" link that leads users to an archive 654 | of the code. There are many ways you could offer source, and different 655 | solutions will be better for different programs; see section 13 for the 656 | specific requirements. 657 | 658 | You should also get your employer (if you work as a programmer) or school, 659 | if any, to sign a "copyright disclaimer" for the program, if necessary. 660 | For more information on this, and how to apply and follow the GNU AGPL, see 661 | . 662 | -------------------------------------------------------------------------------- /Makefile: -------------------------------------------------------------------------------- 1 | ARCHS = arm64 2 | THEOS_PACKAGE_SCHEME = rootless 3 | 4 | TARGET := iphone:clang:16.5:16.5 5 | INSTALL_TARGET_PROCESSES = applaunchmond 6 | 7 | include $(THEOS)/makefiles/common.mk 8 | 9 | TOOL_NAME = applaunchmond 10 | 11 | applaunchmond_FILES = main.m 12 | applaunchmond_CFLAGS = -fobjc-arc 13 | applaunchmond_CODESIGN_FLAGS = -Sentitlements.plist 14 | applaunchmond_INSTALL_PATH = /usr/local/libexec 15 | applaunchmond_PRIVATE_FRAMEWORKS = MobileContainerManager BackBoardServices SpringBoardServices 16 | 17 | include $(THEOS_MAKE_PATH)/tool.mk 18 | 19 | SUBPROJECTS += jb-detect-bypass 20 | include $(THEOS_MAKE_PATH)/aggregate.mk -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | this demonstrates a method to circumvent the detection of tweakloaders by iOS applications -------------------------------------------------------------------------------- /control: -------------------------------------------------------------------------------- 1 | Package: com.ethanarbuckle.jb-detect-bypass 2 | Name: tweak detection bypass 3 | Version: 1.0.0 4 | Architecture: iphoneos-arm64 5 | Description: enable tweaks in apps that usually crash when they detect a tweak loader 6 | Maintainer: ethan arbuckle 7 | Author: ethan arbuckle 8 | Section: System 9 | Tag: role::developer -------------------------------------------------------------------------------- /entitlements.plist: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | platform-application 6 | 7 | com.apple.springboard.launchapplications 8 | 9 | com.apple.system-task-ports 10 | 11 | com.apple.frontboard.launchapplications 12 | 13 | com.apple.private.MobileContainerManager.allowed 14 | 15 | com.apple.private.mobileinstall.allowedSPI 16 | 17 | UninstallForLaunchServices 18 | 19 | com.apple.multitasking.termination 20 | 21 | com.apple.private.security.container-required 22 | 23 | com.apple.frontboard.debugapplications 24 | 25 | task_for_pid-allow 26 | 27 | get-task-allow 28 | 29 | 30 | 31 | -------------------------------------------------------------------------------- /jb-detect-bypass/Makefile: -------------------------------------------------------------------------------- 1 | ARCHS = arm64 2 | 3 | TARGET := iphone:clang:16.5:16.5 4 | 5 | include $(THEOS)/makefiles/common.mk 6 | 7 | TWEAK_NAME = jb-detect-bypass 8 | 9 | jb-detect-bypass_FILES = main.m 10 | jb-detect-bypass_CFLAGS = -fobjc-arc 11 | 12 | include $(THEOS_MAKE_PATH)/tweak.mk 13 | -------------------------------------------------------------------------------- /jb-detect-bypass/jb-detect-bypass.plist: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | Filter 6 | 7 | Bundles 8 | 9 | com.apple.UIKit 10 | 11 | 12 | 13 | 14 | -------------------------------------------------------------------------------- /jb-detect-bypass/logging.h: -------------------------------------------------------------------------------- 1 | #ifndef common_h 2 | #define common_h 3 | 4 | // A lightning serial cable is required to read these, and the device needs to be booted with boot-args "serial=0x3" 5 | extern int proc_pidpath(int pid, void *buffer, uint32_t buffersize); 6 | #define serial_println(msg, ...) \ 7 | do { \ 8 | int fd = open("/dev/console", O_RDWR | O_NOCTTY | O_SYNC | O_NONBLOCK); \ 9 | if (fd > 0) { \ 10 | char buffer[MAXPATHLEN * 2]; \ 11 | char process_name[MAXPATHLEN]; \ 12 | pid_t pid = getpid(); \ 13 | int ret = proc_pidpath(pid, process_name, sizeof(process_name)); \ 14 | if (ret > 0) { \ 15 | char* base_name = strrchr(process_name, '/'); \ 16 | if (base_name) \ 17 | base_name++; \ 18 | else \ 19 | base_name = process_name; \ 20 | snprintf(buffer, sizeof(buffer), "\033[32;1m[%s]\033[0m " msg "\n", base_name, ##__VA_ARGS__); \ 21 | write(fd, buffer, strlen(buffer)); \ 22 | } \ 23 | close(fd); \ 24 | } \ 25 | } while (0) 26 | 27 | #endif /* common_h */ 28 | -------------------------------------------------------------------------------- /jb-detect-bypass/main.m: -------------------------------------------------------------------------------- 1 | #import 2 | #import 3 | #import 4 | #import 5 | #import "logging.h" 6 | 7 | // Executable name of the app to enable tweak injection for 8 | #define TARGET_APP_EXECUTABLE_NAME "" 9 | 10 | // This can be any tweak loader that provides MSHookFunction 11 | #define HOOKING_LIBRARY_DYLIB_PATH ROOT_PATH("/usr/lib/libellekit.dylib") 12 | 13 | static void *orig_posix_spawn; 14 | static void *orig_posix_spawnp; 15 | 16 | static void reverse_string(char *str) { 17 | if (str == NULL) { 18 | return; 19 | } 20 | 21 | unsigned long i = 0; 22 | unsigned long j = strlen(str) - 1; 23 | while (i < j) { 24 | char temp = str[i]; 25 | str[i] = str[j]; 26 | str[j] = temp; 27 | i++; 28 | j--; 29 | } 30 | } 31 | 32 | static int posix_spawn_launchd(pid_t * __restrict pid, const char * __restrict path, const posix_spawn_file_actions_t *file_actions, const posix_spawnattr_t * __restrict attrp, char *const __argv[__restrict], char *const __envp[__restrict], void *original_function) { 33 | 34 | char **new_envp = NULL; 35 | if (path && __envp && strstr(path, "/sbin/launchd") == NULL && strstr(path, TARGET_APP_EXECUTABLE_NAME) != NULL) { 36 | 37 | size_t envp_size = 0; 38 | while (__envp[envp_size] != NULL) { 39 | envp_size++; 40 | } 41 | 42 | new_envp = calloc(envp_size + 2, sizeof(char *)); 43 | if (new_envp == NULL) { 44 | serial_println("Failed to allocate new environment variables"); 45 | return -1; 46 | } 47 | 48 | // Names of tweakloaders to exclude from the process' environment variables (case-insensitive). 49 | // The intent is to cover all of them. Expand as needed 50 | const char *tweakloaders_to_exclude[] = { 51 | "ellekit", 52 | "hook", 53 | "inject", 54 | "substitute" 55 | "substrate", 56 | "loader", 57 | }; 58 | uint32_t num_tweakloaders = sizeof(tweakloaders_to_exclude) / sizeof(tweakloaders_to_exclude[0]); 59 | 60 | char *dyld_insert_libraries = NULL; 61 | char *reversed_libraries = NULL; 62 | size_t j = 0; 63 | 64 | for (size_t i = 0; i < envp_size; i++) { 65 | const char *current_env = __envp[i]; 66 | if (current_env == NULL || strlen(current_env) == 0) { 67 | continue; 68 | } 69 | 70 | if (strncmp(current_env, "DYLD_INSERT_LIBRARIES=", 22) == 0) { 71 | char *libraries = strdup(current_env + 22); 72 | char *token = strtok(libraries, ":"); 73 | char *allowed_libraries = NULL; 74 | char *excluded_libraries = NULL; 75 | 76 | while (token != NULL) { 77 | int should_exclude = 0; 78 | for (uint32_t k = 0; k < num_tweakloaders; k++) { 79 | if (strcasestr(token, tweakloaders_to_exclude[k]) != NULL) { 80 | should_exclude = 1; 81 | break; 82 | } 83 | } 84 | 85 | if (should_exclude) { 86 | serial_println("Excluding library: %s", token); 87 | if (excluded_libraries) { 88 | asprintf(&excluded_libraries, "%s:%s", excluded_libraries, token); 89 | } 90 | else { 91 | excluded_libraries = strdup(token); 92 | } 93 | } 94 | else { 95 | if (allowed_libraries) { 96 | asprintf(&allowed_libraries, "%s:%s", allowed_libraries, token); 97 | } 98 | else { 99 | allowed_libraries = strdup(token); 100 | } 101 | } 102 | 103 | token = strtok(NULL, ":"); 104 | } 105 | 106 | if (allowed_libraries) { 107 | asprintf(&dyld_insert_libraries, "DYLD_INSERT_LIBRARIES=%s", allowed_libraries); 108 | new_envp[j++] = dyld_insert_libraries; 109 | } 110 | 111 | if (excluded_libraries) { 112 | reverse_string(excluded_libraries); 113 | asprintf(&reversed_libraries, "SEIRARBIL_TRESNI_DLYD=%s", excluded_libraries); 114 | new_envp[j++] = reversed_libraries; 115 | } 116 | 117 | free(libraries); 118 | free(allowed_libraries); 119 | free(excluded_libraries); 120 | } 121 | else { 122 | new_envp[j++] = strdup(current_env); 123 | } 124 | } 125 | 126 | new_envp[j] = NULL; 127 | } 128 | 129 | int result = ((int (*)(pid_t * __restrict, const char * __restrict, const posix_spawn_file_actions_t *, const posix_spawnattr_t * __restrict, char *const __argv[__restrict], char *const __envp[__restrict]))original_function)(pid, path, file_actions, attrp, __argv, new_envp ? new_envp : __envp); 130 | 131 | if (new_envp) { 132 | for (size_t i = 0; new_envp[i] != NULL; i++) { 133 | free(new_envp[i]); 134 | } 135 | free(new_envp); 136 | } 137 | 138 | return result; 139 | } 140 | 141 | static int posix_spawn_hook(pid_t * __restrict pid, const char * __restrict path, const posix_spawn_file_actions_t *file_actions, const posix_spawnattr_t * __restrict attrp, char *const __argv[__restrict], char *const __envp[__restrict]) { 142 | return posix_spawn_launchd(pid, path, file_actions, attrp, __argv, __envp, orig_posix_spawn); 143 | } 144 | 145 | static int posix_spawnp_hook(pid_t * __restrict pid, const char * __restrict path, const posix_spawn_file_actions_t *file_actions, const posix_spawnattr_t * __restrict attrp, char *const __argv[__restrict], char *const __envp[__restrict]) { 146 | return posix_spawn_launchd(pid, path, file_actions, attrp, __argv, __envp, orig_posix_spawnp); 147 | } 148 | 149 | 150 | static void init_launchd_hooks(void) { 151 | serial_println("Injected into launchd"); 152 | 153 | // A tweakloader should already be in the process. If not, try to load a hooking library 154 | void *global_handle = dlopen(NULL, RTLD_LAZY); 155 | void *_MSHookFunction = dlsym(global_handle, "MSHookFunction"); 156 | if (_MSHookFunction == NULL) { 157 | serial_println("dlopening hooking library: %s", HOOKING_LIBRARY_DYLIB_PATH); 158 | void *handle = dlopen(HOOKING_LIBRARY_DYLIB_PATH, 0); 159 | if (handle == NULL) { 160 | serial_println("Failed to load hooking library: %s. %s", HOOKING_LIBRARY_DYLIB_PATH, dlerror()); 161 | return; 162 | } 163 | 164 | _MSHookFunction = dlsym(handle, "MSHookFunction"); 165 | } 166 | 167 | if (_MSHookFunction == NULL) { 168 | serial_println("Failed to find MSHookFunction. Cannot proceed"); 169 | return; 170 | } 171 | serial_println("Using MSHookFunction at %p", _MSHookFunction); 172 | 173 | ((void (*)(void *, void *, void **))_MSHookFunction)((void *)posix_spawn, (void *)posix_spawn_hook, (void **)&orig_posix_spawn); 174 | ((void (*)(void *, void *, void **))_MSHookFunction)((void *)posix_spawnp, (void *)posix_spawnp_hook, (void **)&orig_posix_spawnp); 175 | serial_println("Succesfully hooked posix_spawn functions"); 176 | } 177 | 178 | static void load_dyld_insert_libraries(void) { 179 | const char *reversed_libraries = getenv("SEIRARBIL_TRESNI_DLYD"); 180 | if (reversed_libraries == NULL) { 181 | return; 182 | } 183 | serial_println("Found reversed libraries: %s", reversed_libraries); 184 | 185 | char *libraries = strdup(reversed_libraries); 186 | if (libraries == NULL) { 187 | return; 188 | } 189 | 190 | reverse_string(libraries); 191 | 192 | char *library_path = strtok(libraries, ":"); 193 | while (library_path != NULL) { 194 | 195 | if (dlopen(library_path, RTLD_LAZY) == NULL) { 196 | serial_println("Failed to load library: %s. %s", library_path, dlerror()); 197 | } 198 | 199 | library_path = strtok(NULL, ":"); 200 | } 201 | 202 | free(libraries); 203 | } 204 | 205 | static void __attribute__((constructor)) init(void) { 206 | 207 | if (getpid() == 1) { 208 | init_launchd_hooks(); 209 | return; 210 | } 211 | else { 212 | load_dyld_insert_libraries(); 213 | } 214 | } 215 | -------------------------------------------------------------------------------- /layout/DEBIAN/postinst: -------------------------------------------------------------------------------- 1 | #!/bin/sh 2 | 3 | chown root:wheel /var/jb/Library/LaunchDaemons/com.jb-detect-bypass.applaunchmond.plist 4 | chmod 644 /var/jb/Library/LaunchDaemons/com.jb-detect-bypass.applaunchmond.plist 5 | 6 | chown root:wheel /var/jb/usr/local/libexec/applaunchmond 7 | chmod 755 /var/jb/usr/local/libexec/applaunchmond 8 | 9 | launchctl load /var/jb/Library/LaunchDaemons/com.jb-detect-bypass.applaunchmond.plist 2> /dev/null 10 | 11 | exit 0 12 | -------------------------------------------------------------------------------- /layout/DEBIAN/postrm: -------------------------------------------------------------------------------- 1 | #!/bin/sh 2 | 3 | launchctl unload /var/jb/Library/LaunchDaemons/com.jb-detect-bypass.applaunchmond.plist 2> /dev/null 4 | exit 0 5 | -------------------------------------------------------------------------------- /layout/Library/LaunchDaemons/com.jb-detect-bypass.applaunchmond.plist: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | ProcessType 6 | Interactive 7 | Label 8 | com.jb-detect-bypass.applaunchmond 9 | ProgramArguments 10 | 11 | /var/jb/usr/local/libexec/applaunchmond 12 | --launchd 13 | 14 | UserName 15 | root 16 | RunAtLoad 17 | 18 | KeepAlive 19 | 20 | 21 | 22 | -------------------------------------------------------------------------------- /main.m: -------------------------------------------------------------------------------- 1 | #import 2 | #import 3 | #import 4 | #import 5 | #import 6 | #import 7 | #import 8 | 9 | // Bundle ID of the app to enable tweak injection for 10 | #define TARGET_BUNDLE_ID @"" 11 | 12 | #define HELPER_DYLIB_PATH ROOT_PATH("/Library/MobileSubstrate/DynamicLibraries/jb-detect-bypass.dylib") 13 | 14 | extern kern_return_t mach_vm_allocate(vm_map_t target, mach_vm_address_t *address, mach_vm_size_t size, int flags); 15 | extern kern_return_t mach_vm_protect(vm_map_t target_task, mach_vm_address_t address, mach_vm_size_t size, boolean_t set_maximum, vm_prot_t new_protection); 16 | extern kern_return_t mach_vm_write(vm_map_t target_task, mach_vm_address_t address, vm_offset_t data, mach_msg_type_number_t dataCnt); 17 | 18 | NSString * const SBApplicationStateKey = @"SBApplicationStateKey"; 19 | NSString * const SBApplicationStateProcessIDKey = @"SBApplicationStateProcessIDKey"; 20 | NSString * const SBApplicationStateDisplayIDKey = @"SBApplicationStateDisplayIDKey"; 21 | 22 | enum { 23 | ApplicationStateUnknown = 0, 24 | ApplicationStateTerminated = (1 << 0), 25 | ApplicationStateBackgroundRunning = (1 << 2), 26 | ApplicationStateForegroundRunning = (1 << 3), 27 | }; 28 | 29 | static kern_return_t launch_app(NSString *bundleID) { 30 | 31 | Class _FBSSystemService = objc_getClass("FBSSystemService"); 32 | if (_FBSSystemService == NULL) { 33 | NSLog(@"Failed to find FBSSystemService class"); 34 | return KERN_FAILURE; 35 | } 36 | 37 | __block int launchStatus = 0; 38 | dispatch_semaphore_t sem = dispatch_semaphore_create(0); 39 | void (^completionHandler)(NSError *) = ^(NSError *error) { 40 | 41 | launchStatus = error ? KERN_FAILURE : KERN_SUCCESS; 42 | if (error) { 43 | NSLog(@"App launch error: %@", error); 44 | } 45 | 46 | dispatch_semaphore_signal(sem); 47 | }; 48 | 49 | mach_port_t clientPort = ((mach_port_t (*)(void))dlsym(RTLD_DEFAULT, "SBSCreateClientEntitlementEnforcementPort"))(); 50 | if (clientPort == MACH_PORT_NULL) { 51 | NSLog(@"Failed to get client port: %s", dlerror()); 52 | return KERN_FAILURE; 53 | } 54 | 55 | id systemService = ((id (*)(id, SEL))objc_msgSend)(_FBSSystemService, sel_registerName("sharedService")); 56 | NSDictionary *options = @{@"__ActivateSuspended" : @(NO), @"__UnlockDevice": @(YES), @"__DebugOptions": @{@"__Environment": @{@"DYLD_INSERT_LIBRARIES": @""}}}; 57 | ((void (*)(id, SEL, NSString *, NSDictionary *, mach_port_t, void (^)(NSError *)))objc_msgSend)(systemService, sel_registerName("openApplication:options:clientPort:withResult:"), bundleID, options, clientPort, completionHandler); 58 | 59 | if (dispatch_semaphore_wait(sem, dispatch_time(DISPATCH_TIME_NOW, 5 * NSEC_PER_SEC)) != 0) { 60 | NSLog(@"Timed out waiting for app to launch"); 61 | return KERN_FAILURE; 62 | } 63 | 64 | return launchStatus; 65 | } 66 | 67 | static kern_return_t terminate_application_process(NSString *bundleID) { 68 | 69 | dispatch_semaphore_t sem = dispatch_semaphore_create(0); 70 | void (^completionHandler)(void *) = ^void(void *_something) { 71 | dispatch_semaphore_signal(sem); 72 | }; 73 | 74 | Class _FBSSystemService = objc_getClass("FBSSystemService"); 75 | if (_FBSSystemService == NULL) { 76 | NSLog(@"Failed to find FBSSystemService class"); 77 | return KERN_FAILURE; 78 | } 79 | 80 | id systemService = ((id (*)(id, SEL))objc_msgSend)(_FBSSystemService, sel_registerName("sharedService")); 81 | ((void (*)(id, SEL, id, long long, BOOL, id, void (^)(void *)))objc_msgSend)(systemService, sel_registerName("terminateApplication:forReason:andReport:withDescription:completion:"), bundleID, 1, 0, nil, completionHandler); 82 | 83 | if (dispatch_semaphore_wait(sem, dispatch_time(DISPATCH_TIME_NOW, 5 * NSEC_PER_SEC)) != 0) { 84 | NSLog(@"Timed out waiting for app to terminate"); 85 | return KERN_FAILURE; 86 | } 87 | 88 | return KERN_SUCCESS; 89 | } 90 | 91 | static kern_return_t suspend_all_threads(task_t task) { 92 | 93 | thread_act_array_t threads; 94 | mach_msg_type_number_t thread_count; 95 | kern_return_t kr = task_threads(task, &threads, &thread_count); 96 | if (kr != KERN_SUCCESS) { 97 | return kr; 98 | } 99 | 100 | for (mach_msg_type_number_t i = 0; i < thread_count; i++) { 101 | thread_suspend(threads[i]); 102 | } 103 | 104 | vm_deallocate(mach_task_self(), (vm_address_t)threads, thread_count * sizeof(thread_act_t)); 105 | return KERN_SUCCESS; 106 | } 107 | 108 | static kern_return_t resume_all_threads(task_t task) { 109 | 110 | thread_act_array_t threads; 111 | mach_msg_type_number_t thread_count; 112 | kern_return_t kr = task_threads(task, &threads, &thread_count); 113 | if (kr != KERN_SUCCESS) { 114 | return kr; 115 | } 116 | 117 | for (mach_msg_type_number_t i = 0; i < thread_count; i++) { 118 | thread_resume(threads[i]); 119 | } 120 | 121 | vm_deallocate(mach_task_self(), (vm_address_t)threads, thread_count * sizeof(thread_act_t)); 122 | return KERN_SUCCESS; 123 | } 124 | 125 | static kern_return_t inject_dylib_into_task(task_t task, const char *dylib_path) { 126 | 127 | mach_vm_size_t stack_size = 0x4000; 128 | mach_vm_address_t remote_stack; 129 | mach_port_insert_right(mach_task_self(), task, task, MACH_MSG_TYPE_COPY_SEND); 130 | kern_return_t kr = mach_vm_allocate(task, &remote_stack, stack_size, VM_FLAGS_ANYWHERE); 131 | if (kr != KERN_SUCCESS) { 132 | NSLog(@"failed to allocate remote stack: %s", mach_error_string(kr)); 133 | return kr; 134 | } 135 | 136 | mach_vm_protect(task, remote_stack, stack_size, 1, VM_PROT_READ | VM_PROT_WRITE); 137 | 138 | mach_vm_address_t remote_dylib_path_str; 139 | kr = mach_vm_allocate(task, &remote_dylib_path_str, 0x100 + strlen(dylib_path) + 1, VM_FLAGS_ANYWHERE); 140 | if (kr != KERN_SUCCESS) { 141 | NSLog(@"failed to allocate remote dylib path string: %s", mach_error_string(kr)); 142 | return kr; 143 | } 144 | 145 | kr = mach_vm_write(task, 0x100 + remote_dylib_path_str, (vm_offset_t)dylib_path, (mach_msg_type_number_t)strlen(dylib_path) + 1); 146 | if (kr != KERN_SUCCESS) { 147 | NSLog(@"failed to write remote dylib path string: %s", mach_error_string(kr)); 148 | return kr; 149 | } 150 | 151 | uint64_t *stack = malloc(stack_size); 152 | size_t sp = (stack_size / 8) - 2; 153 | kr = mach_vm_write(task, remote_stack, (vm_offset_t)stack, (mach_msg_type_number_t)stack_size); 154 | if (kr != KERN_SUCCESS) { 155 | free(stack); 156 | NSLog(@"failed to write remote stack: %s", mach_error_string(kr)); 157 | return kr; 158 | } 159 | 160 | arm_thread_state64_t state = {}; 161 | bzero(&state, sizeof(arm_thread_state64_t)); 162 | state.__x[0] = (uint64_t)remote_stack; 163 | state.__x[2] = (uint64_t)dlsym(RTLD_NEXT, "dlopen"); 164 | state.__x[3] = (uint64_t)(remote_dylib_path_str + 0x100); 165 | __darwin_arm_thread_state64_set_lr_fptr(state, (void *)0x7171717171717171); 166 | __darwin_arm_thread_state64_set_pc_fptr(state, dlsym(RTLD_NEXT, "pthread_create_from_mach_thread")); 167 | __darwin_arm_thread_state64_set_sp(state, (void *)(remote_stack + (sp * sizeof(uint64_t)))); 168 | 169 | mach_port_t exc_handler; 170 | kr = mach_port_allocate(mach_task_self(), MACH_PORT_RIGHT_RECEIVE, &exc_handler); 171 | if (kr != KERN_SUCCESS) { 172 | free(stack); 173 | NSLog(@"failed to allocate exception handler port: %s", mach_error_string(kr)); 174 | return kr; 175 | } 176 | 177 | kr = mach_port_insert_right(mach_task_self(), exc_handler, exc_handler, MACH_MSG_TYPE_MAKE_SEND); 178 | if (kr != KERN_SUCCESS) { 179 | free(stack); 180 | NSLog(@"failed to insert right to exception handler port: %s", mach_error_string(kr)); 181 | return kr; 182 | } 183 | 184 | mach_port_t remote_thread; 185 | kern_return_t (*_thread_create_running)(task_t, thread_state_flavor_t, thread_state_t, mach_msg_type_number_t, thread_act_t *) = dlsym(RTLD_DEFAULT, "thread_create_running"); 186 | if (_thread_create_running == NULL) { 187 | free(stack); 188 | NSLog(@"failed to resolve thread_create_running"); 189 | return KERN_FAILURE; 190 | } 191 | if (_thread_create_running(task, ARM_THREAD_STATE64, (thread_state_t)&state, ARM_THREAD_STATE64_COUNT, &remote_thread) != KERN_SUCCESS) { 192 | free(stack); 193 | NSLog(@"failed to create remote thread"); 194 | return KERN_FAILURE; 195 | } 196 | 197 | kern_return_t (*_thread_set_exception_ports)(thread_act_t, exception_mask_t, mach_port_t, exception_behavior_t, thread_state_flavor_t) = dlsym(RTLD_DEFAULT, "thread_set_exception_ports"); 198 | if (_thread_set_exception_ports == NULL) { 199 | free(stack); 200 | NSLog(@"failed to resolve thread_set_exception_ports"); 201 | return KERN_FAILURE; 202 | } 203 | if (_thread_set_exception_ports(remote_thread, EXC_MASK_BAD_ACCESS, exc_handler, EXCEPTION_DEFAULT | MACH_EXCEPTION_CODES, ARM_THREAD_STATE64) != KERN_SUCCESS) { 204 | free(stack); 205 | NSLog(@"failed to set remote exception port"); 206 | return KERN_FAILURE; 207 | } 208 | 209 | thread_resume(remote_thread); 210 | 211 | void (*_mach_msg)(mach_msg_header_t *, mach_msg_option_t, mach_msg_size_t, mach_msg_size_t, mach_port_t, mach_msg_timeout_t, mach_port_t) = dlsym(RTLD_DEFAULT, "mach_msg"); 212 | if (_mach_msg == NULL) { 213 | free(stack); 214 | NSLog(@"failed to resolve mach_msg"); 215 | return KERN_FAILURE; 216 | } 217 | 218 | mach_msg_header_t *msg = malloc(0x4000); 219 | _mach_msg(msg, MACH_RCV_MSG | MACH_RCV_LARGE, 0, 0x4000, exc_handler, 0, MACH_PORT_NULL); 220 | free(msg); 221 | 222 | kern_return_t (*_thread_terminate)(thread_act_t) = dlsym(RTLD_DEFAULT, "thread_terminate"); 223 | if (_thread_terminate == NULL) { 224 | free(stack); 225 | NSLog(@"failed to resolve thread_terminate"); 226 | return -1; 227 | } 228 | 229 | _thread_terminate(remote_thread); 230 | free(stack); 231 | return KERN_SUCCESS; 232 | } 233 | 234 | static kern_return_t inject_dylib_into_pid(pid_t pid, const char *dylib_path, bool suspend_threads) { 235 | 236 | task_t task; 237 | kern_return_t kr = task_for_pid(mach_task_self(), pid, &task); 238 | if (kr != KERN_SUCCESS) { 239 | NSLog(@"Failed to get task for PID %d: %s", pid, mach_error_string(kr)); 240 | return kr; 241 | } 242 | 243 | if (suspend_threads && (kr = suspend_all_threads(task)) != KERN_SUCCESS) { 244 | NSLog(@"Failed to suspend threads for PID %d: %s", pid, mach_error_string(kr)); 245 | return kr; 246 | } 247 | 248 | if ((kr = inject_dylib_into_task(task, dylib_path)) != KERN_SUCCESS) { 249 | NSLog(@"Failed to inject dylib into PID %d: %s", pid, mach_error_string(kr)); 250 | // Kill the app if it's still running 251 | terminate_application_process(TARGET_BUNDLE_ID); 252 | return kr; 253 | } 254 | 255 | if (suspend_threads && (kr = resume_all_threads(task)) != KERN_SUCCESS) { 256 | NSLog(@"Failed to resume threads for PID %d: %s", pid, mach_error_string(kr)); 257 | } 258 | 259 | return kr; 260 | } 261 | 262 | static void (^handler)(NSDictionary *info); 263 | 264 | int main(int argc, char *argv[]) { 265 | @autoreleasepool { 266 | 267 | if (argc == 2 && strcmp(argv[1], "--launchd") == 0) { 268 | 269 | bool suspend_threads = false; 270 | kern_return_t kr = inject_dylib_into_pid(1, HELPER_DYLIB_PATH, suspend_threads); 271 | if (kr != KERN_SUCCESS) { 272 | NSLog(@"Failed to inject helper into launchd: %s", mach_error_string(kr)); 273 | return kr; 274 | } 275 | } 276 | 277 | id monitor = [[objc_getClass("BKSApplicationStateMonitor") alloc] init]; 278 | if (!monitor) { 279 | NSLog(@"Failed to create application process monitor"); 280 | return 1; 281 | } 282 | 283 | __block int lastKnownPid = -1; 284 | handler = ^(NSDictionary *info) { 285 | if (![info objectForKey:SBApplicationStateProcessIDKey]) { 286 | return; 287 | } 288 | 289 | // Skip processes that are not the target app 290 | NSString *launchedAppBundleId = [info objectForKey:SBApplicationStateDisplayIDKey]; 291 | if ([launchedAppBundleId isEqualToString:TARGET_BUNDLE_ID] == NO) { 292 | return; 293 | } 294 | 295 | int currentPid = [info[SBApplicationStateProcessIDKey] intValue]; 296 | if (currentPid < 1) { 297 | return; 298 | } 299 | 300 | BOOL isEnteringForeground = [info[SBApplicationStateKey] unsignedIntValue] == ApplicationStateForegroundRunning; 301 | if (lastKnownPid != currentPid && isEnteringForeground) { 302 | lastKnownPid = currentPid; 303 | NSLog(@"Detected %@ launching with PID %d", launchedAppBundleId, currentPid); 304 | 305 | // Inject the helper dylib 306 | bool suspend_threads = true; 307 | kern_return_t kr = inject_dylib_into_pid(currentPid, HELPER_DYLIB_PATH, suspend_threads); 308 | if (kr != KERN_SUCCESS) { 309 | NSLog(@"Failed to inject helper dylib into PID %d: %s", currentPid, mach_error_string(kr)); 310 | 311 | // Try launching it again 312 | terminate_application_process(TARGET_BUNDLE_ID); 313 | launch_app(TARGET_BUNDLE_ID); 314 | 315 | // The handler will be called again with the new PID 316 | return; 317 | } 318 | 319 | NSLog(@"Successfully injected dylib into PID %d", currentPid); 320 | } 321 | }; 322 | ((void (*)(id, SEL, void (^)(NSDictionary *)))objc_msgSend)(monitor, sel_registerName("setHandler:"), handler); 323 | 324 | dispatch_main(); 325 | } 326 | 327 | return 0; 328 | } 329 | --------------------------------------------------------------------------------