实现Android arm64(aarch64)中的so注入(inject) ,并且兼容x86和arm。如果没有搞错,这是国内外第一份公开的arm64注入的针对性完整资料~~
代码基于 ariesjzj 的 《Android中的so注入(inject)和挂钩(hook)
- For both x86 and arm》,增加了对arm64的支持。(目前已经开始有64位安卓手机)
同样,代码由jni中以下三个文件构成。
inject.c
Android.mk
Application.mk
其中Android.mk一样,Application.mk中
APP_ABI := arm64-v8a
inject.c如下:
#include <stdio.h> #include <stdlib.h> #include <asm/user.h> #include <asm/ptrace.h> #include <sys/ptrace.h> #include <sys/wait.h> #include <sys/mman.h> #include <dlfcn.h> #include <dirent.h> #include <unistd.h> #include <string.h> #include <elf.h> #include <android/log.h> #include <sys/uio.h> #if defined(__i386__) #define pt_regs user_regs_struct #elif defined(__aarch64__) #define pt_regs user_pt_regs #define uregs regs #define ARM_pc pc #define ARM_sp sp #define ARM_cpsr pstate #define ARM_lr regs[30] #define ARM_r0 regs[0] #define PTRACE_GETREGS PTRACE_GETREGSET #define PTRACE_SETREGS PTRACE_SETREGSET #endif #define ENABLE_DEBUG 1 #if ENABLE_DEBUG #define LOG_TAG "INJECT" #define LOGD(fmt, args...) __android_log_print(ANDROID_LOG_DEBUG,LOG_TAG, fmt, ##args) #define DEBUG_PRINT(format,args...) \ LOGD(format, ##args) #else #define DEBUG_PRINT(format,args...) #endif #define CPSR_T_MASK ( 1u << 5 ) #if defined(__aarch64__) const char *libc_path = "/system/lib64/libc.so"; const char *linker_path = "/system/bin/linker64"; #else const char *libc_path = "/system/lib/libc.so"; const char *linker_path = "/system/bin/linker"; #endif int ptrace_readdata(pid_t pid, uint8_t *src, uint8_t *buf, size_t size) { long i, j, remain; uint8_t *laddr; size_t bytes_width = sizeof(long); union u { long val; char chars[bytes_width]; } d; j = size / bytes_width; remain = size % bytes_width; laddr = buf; for (i = 0; i < j; i ++) { d.val = ptrace(PTRACE_PEEKTEXT, pid, src, 0); memcpy(laddr, d.chars, bytes_width); src += bytes_width; laddr += bytes_width; } if (remain > 0) { d.val = ptrace(PTRACE_PEEKTEXT, pid, src, 0); memcpy(laddr, d.chars, remain); } return 0; } int ptrace_writedata(pid_t pid, uint8_t *dest, uint8_t *data, size_t size) { long i, j, remain; uint8_t *laddr; size_t bytes_width = sizeof(long); union u { long val; char chars[bytes_width]; } d; j = size / bytes_width; remain = size % bytes_width; laddr = data; for (i = 0; i < j; i ++) { memcpy(d.chars, laddr, bytes_width); ptrace(PTRACE_POKETEXT, pid, dest, d.val); dest += bytes_width; laddr += bytes_width; } if (remain > 0) { d.val = ptrace(PTRACE_PEEKTEXT, pid, dest, 0); for (i = 0; i < remain; i ++) { d.chars[i] = *laddr ++; } ptrace(PTRACE_POKETEXT, pid, dest, d.val); } return 0; } #if defined(__arm__) || defined(__aarch64__) int ptrace_call(pid_t pid, uintptr_t addr, long *params, int num_params, struct pt_regs* regs) { int i; #if defined(__arm__) int num_param_registers = 4; #elif defined(__aarch64__) int num_param_registers = 8; #endif for (i = 0; i < num_params && i < num_param_registers; i ++) { regs->uregs[i] = params[i]; } // // push remained params onto stack // if (i < num_params) { regs->ARM_sp -= (num_params - i) * sizeof(long) ; ptrace_writedata(pid, (void *)regs->ARM_sp, (uint8_t *)¶ms[i], (num_params - i) * sizeof(long)); } regs->ARM_pc = addr; if (regs->ARM_pc & 1) { /* thumb */ regs->ARM_pc &= (~1u); regs->ARM_cpsr |= CPSR_T_MASK; } else { /* arm */ regs->ARM_cpsr &= ~CPSR_T_MASK; } regs->ARM_lr = 0; if (ptrace_setregs(pid, regs) == -1 || ptrace_continue(pid) == -1) { printf("error\n"); return -1; } int stat = 0; waitpid(pid, &stat, WUNTRACED); while (stat != 0xb7f) { if (ptrace_continue(pid) == -1) { printf("error\n"); return -1; } waitpid(pid, &stat, WUNTRACED); } return 0; } #elif defined(__i386__) long ptrace_call(pid_t pid, uintptr_t addr, long *params, int num_params, struct user_regs_struct * regs) { regs->esp -= (num_params) * sizeof(long) ; ptrace_writedata(pid, (void *)regs->esp, (uint8_t *)params, (num_params) * sizeof(long)); long tmp_addr = 0x00; regs->esp -= sizeof(long); ptrace_writedata(pid, regs->esp, (char *)&tmp_addr, sizeof(tmp_addr)); regs->eip = addr; if (ptrace_setregs(pid, regs) == -1 || ptrace_continue( pid) == -1) { printf("error\n"); return -1; } int stat = 0; waitpid(pid, &stat, WUNTRACED); while (stat != 0xb7f) { if (ptrace_continue(pid) == -1) { printf("error\n"); return -1; } waitpid(pid, &stat, WUNTRACED); } return 0; } #else #error "Not supported" #endif int ptrace_getregs(pid_t pid, struct pt_regs * regs) { #if defined (__aarch64__) int regset = NT_PRSTATUS; struct iovec ioVec; ioVec.iov_base = regs; ioVec.iov_len = sizeof(*regs); if (ptrace(PTRACE_GETREGSET, pid, (void*)regset, &ioVec) < 0) { perror("ptrace_getregs: Can not get register values"); printf(" io %llx, %d", ioVec.iov_base, ioVec.iov_len); return -1; } return 0; #else if (ptrace(PTRACE_GETREGS, pid, NULL, regs) < 0) { perror("ptrace_getregs: Can not get register values"); return -1; } return 0; #endif } int ptrace_setregs(pid_t pid, struct pt_regs * regs) { #if defined (__aarch64__) int regset = NT_PRSTATUS; struct iovec ioVec; ioVec.iov_base = regs; ioVec.iov_len = sizeof(*regs); if (ptrace(PTRACE_SETREGSET, pid, (void*)regset, &ioVec) < 0) { perror("ptrace_setregs: Can not get register values"); return -1; } return 0; #else if (ptrace(PTRACE_SETREGS, pid, NULL, regs) < 0) { perror("ptrace_setregs: Can not set register values"); return -1; } return 0; #endif } int ptrace_continue(pid_t pid) { if (ptrace(PTRACE_CONT, pid, NULL, 0) < 0) { perror("ptrace_cont"); return -1; } return 0; } int ptrace_attach(pid_t pid) { if (ptrace(PTRACE_ATTACH, pid, NULL, 0) < 0) { perror("ptrace_attach"); return -1; } int status = 0; waitpid(pid, &status , WUNTRACED); return 0; } int ptrace_detach(pid_t pid) { if (ptrace(PTRACE_DETACH, pid, NULL, 0) < 0) { perror("ptrace_detach"); return -1; } return 0; } void* get_module_base(pid_t pid, const char* module_name) { FILE *fp; long addr = 0; char *pch; char filename[32]; char line[1024]; if (pid < 0) { /* self process */ snprintf(filename, sizeof(filename), "/proc/self/maps", pid); } else { snprintf(filename, sizeof(filename), "/proc/%d/maps", pid); } fp = fopen(filename, "r"); if (fp != NULL) { while (fgets(line, sizeof(line), fp)) { if (strstr(line, module_name)) { pch = strtok( line, "-" ); addr = strtoull( pch, NULL, 16 ); if (addr == 0x8000) addr = 0; break; } } fclose(fp) ; } return (void *)addr; } void* get_remote_addr(pid_t target_pid, const char* module_name, void* local_addr) { void* local_handle, *remote_handle; local_handle = get_module_base(-1, module_name); remote_handle = get_module_base(target_pid, module_name); DEBUG_PRINT("[+] get_remote_addr: local[%llx], remote[%llx]\n", local_handle, remote_handle); void * ret_addr = (void *)((uintptr_t)local_addr + (uintptr_t)remote_handle - (uintptr_t)local_handle); #if defined(__i386__) if (!strcmp(module_name, libc_path)) { ret_addr += 2; } #endif return ret_addr; } int find_pid_of(const char *process_name) { int id; pid_t pid = -1; DIR* dir; FILE *fp; char filename[32]; char cmdline[256]; struct dirent * entry; if (process_name == NULL) return -1; dir = opendir("/proc"); if (dir == NULL) return -1; while((entry = readdir(dir)) != NULL) { id = atoi(entry->d_name); if (id != 0) { sprintf(filename, "/proc/%d/cmdline", id); fp = fopen(filename, "r"); if (fp) { fgets(cmdline, sizeof(cmdline), fp); fclose(fp); if (strcmp(process_name, cmdline) == 0) { /* process found */ pid = id; break; } } } } closedir(dir); return pid; } uint64_t ptrace_retval(struct pt_regs * regs) { #if defined(__arm__) || defined(__aarch64__) return regs->ARM_r0; #elif defined(__i386__) return regs->eax; #else #error "Not supported" #endif } uint64_t ptrace_ip(struct pt_regs * regs) { #if defined(__arm__) || defined(__aarch64__) return regs->ARM_pc; #elif defined(__i386__) return regs->eip; #else #error "Not supported" #endif } int ptrace_call_wrapper(pid_t target_pid, const char * func_name, void * func_addr, long * parameters, int param_num, struct pt_regs * regs) { DEBUG_PRINT("[+] Calling %s in target process.\n", func_name); if (ptrace_call(target_pid, (uintptr_t)func_addr, parameters, param_num, regs) == -1) return -1; if (ptrace_getregs(target_pid, regs) == -1) return -1; DEBUG_PRINT("[+] Target process returned from %s, return value=%llx, pc=%llx \n", func_name, ptrace_retval(regs), ptrace_ip(regs)); return 0; } int inject_remote_process(pid_t target_pid, const char *library_path, const char *function_name, const char *param, size_t param_size) { int ret = -1; void *mmap_addr, *dlopen_addr, *dlsym_addr, *dlclose_addr, *dlerror_addr; void *local_handle, *remote_handle, *dlhandle; uint8_t *map_base = 0; uint8_t *dlopen_param1_ptr, *dlsym_param2_ptr, *saved_r0_pc_ptr, *inject_param_ptr, *remote_code_ptr, *local_code_ptr; struct pt_regs regs, original_regs; long parameters[10]; DEBUG_PRINT("[+] Injecting process: %d\n", target_pid); if (ptrace_attach(target_pid) == -1) goto exit; if (ptrace_getregs(target_pid, ®s) == -1) goto exit; /* save original registers */ memcpy(&original_regs, ®s, sizeof(regs)); mmap_addr = get_remote_addr(target_pid, libc_path, (void *)mmap); DEBUG_PRINT("[+] Remote mmap address: %llx\n", mmap_addr); /* call mmap */ parameters[0] = 0; // addr parameters[1] = 0x4000; // size parameters[2] = PROT_READ | PROT_WRITE | PROT_EXEC; // prot parameters[3] = MAP_ANONYMOUS | MAP_PRIVATE; // flags parameters[4] = 0; //fd parameters[5] = 0; //offset if (ptrace_call_wrapper(target_pid, "mmap", mmap_addr, parameters, 6, ®s) == -1) goto exit; map_base = ptrace_retval(®s); dlopen_addr = get_remote_addr( target_pid, linker_path, (void *)dlopen ); dlsym_addr = get_remote_addr( target_pid, linker_path, (void *)dlsym ); dlclose_addr = get_remote_addr( target_pid, linker_path, (void *)dlclose ); dlerror_addr = get_remote_addr( target_pid, linker_path, (void *)dlerror ); DEBUG_PRINT("[+] Get imports: dlopen: %llx, dlsym: %llx, dlclose: %llx, dlerror: %llx\n", dlopen_addr, dlsym_addr, dlclose_addr, dlerror_addr); printf("library path = %s\n", library_path); ptrace_writedata(target_pid, map_base, library_path, strlen(library_path) + 1); parameters[0] = map_base; parameters[1] = RTLD_NOW| RTLD_GLOBAL; if (ptrace_call_wrapper(target_pid, "dlopen", dlopen_addr, parameters, 2, ®s) == -1) goto exit; void * sohandle = ptrace_retval(®s); if(!sohandle) { if (ptrace_call_wrapper(target_pid, "dlerror", dlerror_addr, 0, 0, ®s) == -1) goto exit; uint8_t *errret = ptrace_retval(®s); uint8_t errbuf[100]; ptrace_readdata(target_pid, errret, errbuf, 100); } #define FUNCTION_NAME_ADDR_OFFSET 0x100 ptrace_writedata(target_pid, map_base + FUNCTION_NAME_ADDR_OFFSET, function_name, strlen(function_name) + 1); parameters[0] = sohandle; parameters[1] = map_base + FUNCTION_NAME_ADDR_OFFSET; if (ptrace_call_wrapper(target_pid, "dlsym", dlsym_addr, parameters, 2, ®s) == -1) goto exit; void * hook_entry_addr = ptrace_retval(®s); DEBUG_PRINT("hook_entry_addr = %p\n", hook_entry_addr); #define FUNCTION_PARAM_ADDR_OFFSET 0x200 ptrace_writedata(target_pid, map_base + FUNCTION_PARAM_ADDR_OFFSET, param, strlen(param) + 1); parameters[0] = map_base + FUNCTION_PARAM_ADDR_OFFSET; if (ptrace_call_wrapper(target_pid, "hook_entry", hook_entry_addr, parameters, 1, ®s) == -1) goto exit; printf("Press enter to dlclose and detach\n"); getchar(); parameters[0] = sohandle; if (ptrace_call_wrapper(target_pid, "dlclose", dlclose, parameters, 1, ®s) == -1) goto exit; /* restore */ ptrace_setregs(target_pid, &original_regs); ptrace_detach(target_pid); ret = 0; exit: return ret; } int main(int argc, char** argv) { pid_t target_pid; target_pid = find_pid_of("system_server"); if (-1 == target_pid) { printf("Can't find the process\n"); return -1; } //target_pid = find_pid_of("/data/test"); inject_remote_process(target_pid, "/data/libhello.so", "hook_entry", "I'm parameter!", strlen("I'm parameter!")); return 0; }
另外,也用到libhello.so,代码基本不变,只是其中Application.mk中也指定生成arm64。
APP_ABI := arm64-v8a
最后要注意一点,目前arm64的手机应该都是Android 5.0+的,可能会因selinux的权限控制造成注入失败,比如例子中的system_server会失败,但注入calendar没问题。
此时可以暂时关闭掉selinux(执行setenforce 0),要针对解决就需要配置selinux了。
时间: 2024-10-11 03:15:44