Android6.0 X86 ARM64位可用的注入Inject
来源:互联网 发布:淘宝代付可以用花呗吗 编辑:程序博客网 时间:2024/05/24 08:33
转:http://blog.csdn.net/ganyao939543405/article/details/52584535
最近在网上搜索Android的Inject与Hook,发现很多都因为时间久远而失效了,试了很多方案,最终找到了一个,特地来转载分享一下,本人的三星S6 6.0.1系统测试可用,另外4.2 4.4也都测试通过。
另外加上了注释便于大家理解。
转自 http://blog.csdn.NET/jinzhuojun/article/details/9900105
1.inject.c
#include <stdio.h> #include <stdlib.h> #include <sys/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 uregsregs#define ARM_pcpc#define ARM_spsp#define ARM_cpsrpstate#define ARM_lrregs[30]#define ARM_r0regs[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"; #elseconst 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; } /*Func : 将size字节的data数据写入到pid进程的dest地址处@param dest: 目的进程的栈地址@param data: 需要写入的数据的起始地址@param size: 需要写入的数据的大小,以字节为单位*/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);//很巧妙的联合体,这样就可以方便的以字节为单位写入4字节数据,再以long为单位ptrace_poketext到栈中 union u { long val; char chars[bytes_width]; } d; j = size / bytes_width; remain = size % bytes_width; laddr = data;//先以4字节为单位进行数据写入 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) {//为了最大程度的保持原栈的数据,先读取dest的long数据,然后只更改其中的前remain字节,再写回 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; } /*功能总结:1,将要执行的指令写入寄存器中,指令长度大于4个long的话,需要将剩余的指令通过ptrace_writedata函数写入栈中;2,使用ptrace_continue函数运行目的进程,直到目的进程返回状态值0xb7f(对该值的分析见后面红字);3,函数执行完之后,目标进程挂起,使用ptrace_getregs函数获取当前的所有寄存器值,方便后面使用ptrace_retval函数获取函数的返回值。*/#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 *)& params[i], (num_params - i) * sizeof(long)); } //将PC寄存器值设为目标函数的地址 regs->ARM_pc = addr; //进行指令集判断 if (regs->ARM_pc & 1) { /* thumb */ regs->ARM_pc &= (~1u); // #define CPSR_T_MASK ( 1u << 5 ) CPSR为程序状态寄存器 regs->ARM_cpsr |= CPSR_T_MASK; } else { /* arm */ regs->ARM_cpsr &= ~CPSR_T_MASK; } //设置子程序的返回地址为空,以便函数执行完后,返回到null地址,产生SIGSEGV错误,详细作用见后面的红字分析 regs->ARM_lr = 0; /* *Ptrace_setregs就是将修改后的regs写入寄存器中,然后调用ptrace_continue来执行我们指定的代码 */ if (ptrace_setregs(pid, regs) == -1 || ptrace_continue(pid) == -1) { printf("error\n"); return -1; } int stat = 0; waitpid(pid, &stat, WUNTRACED); /* WUNTRACED告诉waitpid,如果子进程进入暂停状态,那么就立即返回。如果是被ptrace的子进程,那么即使不提供WUNTRACED参数,也会在子进程进入暂停状态的时候立即返回。对于使用ptrace_cont运行的子进程,它会在3种情况下进入暂停状态:①下一次系统调用;②子进程退出;③子进程的执行发生错误。这里的0xb7f就表示子进程进入了暂停状态,且发送的错误信号为11(SIGSEGV),它表示试图访问未分配给自己的内存, 或试图往没有写权限的内存地址写数据。那么什么时候会发生这种错误呢?显然,当子进程执行完注入的函数后,由于我们在前面设置了regs->ARM_lr = 0,它就会返回到0地址处继续执行,这样就会产生SIGSEGV了!*/ //这个循环是否必须我还不确定。因为目前每次ptrace_call调用必定会返回0xb7f,不过在这也算是增加容错性吧~//通过看ndk的源码sys/wait.h以及man waitpid可以知道这个0xb7f的具体作用。首先说一下stat的值:高2字节用于表示导致子进程的退出或暂停状态信号值,低2字节表示子进程是退出(0x0)还是暂停(0x7f)状态。0xb7f就表示子进程为暂停状态,导致它暂停的信号量为11即sigsegv错误。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; }//显然,这里面核心的就是get_module_base函数:/*此函数的功能就是通过遍历/proc/pid/maps文件,来找到目的module_name的内存映射起始地址。由于内存地址的表达方式是startAddrxxxxxxx-endAddrxxxxxxx的,所以会在后面使用strtok(line,"-")来分割字符串如果pid = -1,表示获取本地进程的某个模块的地址,否则就是pid进程的某个模块的地址。*/ 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)) {//分解字符串为一组字符串。line为要分解的字符串,"-"为分隔符字符串。 pch = strtok( line, "-" );//将参数pch字符串根据参数base(表示进制)来转换成无符号的长整型数 addr = strtoull( pch, NULL, 16 ); if (addr == 0x8000) addr = 0; break; } } fclose(fp) ; } return (void *)addr; } /*该函数为一个封装函数,通过调用get_module_base函数来获取目的进程的某个模块的起始地址,然后通过公式计算出指定函数在目的进程的起始地址。*/void* get_remote_addr(pid_t target_pid, const char* module_name, void* local_addr) { void* local_handle, *remote_handle; //获取本地某个模块的起始地址 local_handle = get_module_base(-1, module_name); //获取远程pid的某个模块的起始地址 remote_handle = get_module_base(target_pid, module_name); DEBUG_PRINT("[+] get_remote_addr: local[%llx], remote[%llx]\n", local_handle, remote_handle); /*这需要我们好好理解:local_addr - local_handle的值为指定函数(如mmap)在该模块中的偏移量,然后再加上rempte_handle,结果就为指定函数在目的进程的虚拟地址*/ 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; } //根据name找到pidint 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 } //总结一下ptrace_call_wrapper,它的完成两个功能://一是调用ptrace_call函数来执行指定函数,执行完后将子进程挂起;//二是调用ptrace_getregs函数获取所有寄存器的值,主要是为了获取r0即函数的返回值。 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; } //远程注入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); //①ATTATCH,指定目标进程,开始调试 if (ptrace_attach(target_pid) == -1) goto exit; //②GETREGS,获取目标进程的寄存器,保存现场 if (ptrace_getregs(target_pid, ®s) == -1) goto exit; /* save original registers */ memcpy(&original_regs, ®s, sizeof(regs)); //③通过get_remote_addr函数获取目的进程的mmap函数的地址,以便为libxxx.so分配内存 /*需要对(void*)mmap进行说明:这是取得inject本身进程的mmap函数的地址,由于mmap函数在libc.so 库中,为了将libxxx.so加载到目的进程中,就需要使用目的进程的mmap函数,所以需要查找到libc.so库在目的进程的起始地址。*/ mmap_addr = get_remote_addr(target_pid, libc_path, (void *)mmap); DEBUG_PRINT("[+] Remote mmap address: %llx\n", mmap_addr);/* call mmap (null, 0x4000, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_ANONYMOUS | MAP_PRIVATE, 0, 0);匿名申请一块0x4000大小的内存*/ 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; //⑤从寄存器中获取mmap函数的返回值,即申请的内存首地址: map_base = ptrace_retval(®s); //⑥依次获取linker中dlopen、dlsym、dlclose、dlerror函数的地址: 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); //⑦调用dlopen函数:/*①将要注入的so名写入前面mmap出来的内存②写入dlopen代码③执行dlopen("libxxx.so", RTLD_NOW ! RTLD_GLOBAL) RTLD_NOW之类的参数作用可参考:http://baike.baidu.com/view/2907309.htm?fr=aladdin ④取得dlopen的返回值,存放在sohandle变量中*/ 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); } //⑧调用dlsym函数/*等同于hook_entry_addr = (void *)dlsym(sohandle, "hook_entry");*/ #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); //⑨调用hook_entry函数:#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; //⑩调用dlclose关闭lib: if (ptrace_call_wrapper(target_pid, "dlclose", dlclose, parameters, 1, ®s) == -1) goto exit; /* restore */ //⑪恢复现场并退出ptrace: 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; }
Android.mk
LOCAL_PATH := $(call my-dir) include $(CLEAR_VARS) LOCAL_MODULE := inject LOCAL_SRC_FILES := inject.c #shellcode.s LOCAL_LDLIBS += -L$(SYSROOT)/usr/lib -llog #LOCAL_FORCE_STATIC_EXECUTABLE := true include $(BUILD_EXECUTABLE)
application.mk
APP_ABI :=arm64-v8a armeabi-v7a
#include <unistd.h> #include <stdio.h> #include <stdlib.h> #include <android/log.h> #include <elf.h> #include <fcntl.h> #define LOG_TAG "DEBUG" #define LOGD(fmt, args...) __android_log_print(ANDROID_LOG_DEBUG, LOG_TAG, fmt, ##args) int hook_entry(char * a){ LOGD("Hook success, pid = %d\n", getpid()); LOGD("Hello %s\n", a); return 0; }
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