![\"\u5c01\u9762\u4fe1\u606f\u56fe\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261012135658-6acce72a7d7cc.webp\")
<\/p>\n<\/p>\n
\u5728\u79fb\u52a8\u7aef\u5b89\u5168\u4e0e\u4e1a\u52a1\u98ce\u63a7\u5bf9\u6297\u4e2d，\u9006\u5411\u5de5\u7a0b\u5e08\u6700\u5e38\u9762\u5bf9\u7684\u4e00\u9053\u96be\u5173，\u83ab\u8fc7\u4e8e\u7535\u5546 App \u6838\u5fc3\u8d44\u4ea7\u6a21\u5757（\u5982\u53cc 11 \u79d2\u6740\u8bf7\u6c42\u7b7e\u540d\u751f\u6210\u3001\u9ad8\u5371\u63a5\u53e3\u8bbe\u5907\u6307\u7eb9\u52a0\u5bc6）\u7684\u9006\u5411\u8fd8\u539f\u3002\u5f00\u53d1\u56e2\u961f\u4e3a\u4e86\u5bf9\u6297\u9006\u5411，\u901a\u5e38\u4f1a\u5c06\u6838\u5fc3 C\/C++ \u7b97\u6cd5\u7f16\u8bd1\u8fdb Android Native SO \u5e93（\u5982 libsec_sign.so），\u5e76\u5957\u4e0a\u9ad8\u5f3a\u5ea6\u7684\u5546\u4e1a\u52a0\u56fa\u5916\u58f3：\u53cc\u5c42\u63a7\u5236\u6d41\u5e73\u5766\u5316（OLLVM Flattening）\u3001\u4e0a\u4e07\u6761\u7531\u5b8f\u5c55\u5f00\u6784\u6210\u7684\u865a\u5047\u6307\u4ee4（Bogus Control Flow）\u3001\u4ee5\u53ca\u52a8\u6001\u6307\u4ee4\u66ff\u6362\u4e0e\u81ea\u4fee\u6539\u4ee3\u7801（Self-Modifying Code）\u3002<\/p>\n
\u9762\u5bf9\u8fd9\u79cd\u52a8\u8f84\u6570\u4e07\u884c\u53cd\u7f16\u8bd1\u4f2a\u4ee3\u7801\u7684\u5e9e\u7136\u5927\u7269，\u5982\u679c\u575a\u6301\u201c\u7eaf\u624b\u5de5\u9759\u6001\u8fd8\u539f\u6bcf\u4e00\u4e2a\u4f4d\u8fd0\u7b97\u3001\u7528 Python \u91cd\u5199\u4e00\u5957\u6570\u5b66\u903b\u8f91\u201d，\u5373\u4fbf\u662f\u4e00\u4e2a\u7ecf\u9a8c\u6781\u4e3a\u4e30\u5bcc\u7684\u9ad8\u7ea7\u9006\u5411\u4e13\u5bb6，\u5f80\u5f80\u4e5f\u9700\u8981\u6d88\u8017\u6570\u5468\u751a\u81f3\u6574\u6708\u7684\u65f6\u95f4；\u800c\u5982\u679c\u91c7\u7528\u57fa\u4e8e\u771f\u673a\u7684 Frida RPC \u6302\u94a9\u65b9\u6848，\u7531\u4e8e\u9700\u8981\u4f9d\u8d56\u771f\u5b9e\u7684\u624b\u673a\u786c\u4ef6\u3001USB \u8c03\u8bd5\u7ebf\u4ee5\u53ca\u771f\u673a\u73af\u5883\u53cd\u68c0\u6d4b\u7ef4\u62a4，\u5176\u5728\u5de5\u4e1a\u7ea7\u81ea\u52a8\u5316\u6d4b\u8bd5\u6216\u9ad8\u5e76\u53d1\u6279\u91cf\u8c03\u7528\u65f6\u4e0d\u4ec5\u6781\u5176\u7b28\u91cd，\u4e14\u6781\u6613\u56e0\u624b\u673a\u53d1\u70ed\u6389\u7ebf\u800c\u5d29\u6e83\u3002<\/p>\n
\u9762\u5bf9\u8fd9\u4e00\u56f0\u5883，\u73b0\u4ee3\u9ad8\u9636\u9006\u5411\u5de5\u7a0b\u50ac\u751f\u51fa\u4e86\u4e00\u79cd\u5177\u5907\u964d\u7ef4\u6253\u51fb\u80fd\u529b\u7684\u4f18\u96c5\u6d41\u6d3e\u2014\u2014\u57fa\u4e8e Unicorn \u5f15\u64ce\u7684\u7eaf\u8131\u673a CPU \u6a21\u62df\u6267\u884c（CPU Emulation）\u3002<\/p>\n
\u6211\u4eec\u6839\u672c\u4e0d\u9700\u8981\u53bb\u5173\u5fc3\u7b97\u6cd5\u5185\u90e8\u7ecf\u8fc7\u4e86\u591a\u4e48\u590d\u6742\u7684 OLLVM \u6df7\u6dc6，\u4e5f\u4e0d\u9700\u8981\u4e00\u53f0\u771f\u5b9e\u7684 Android \u624b\u673a\u3002\u6211\u4eec\u76f4\u63a5\u5728 PC \u7aef\u7684 Python \u8fdb\u7a0b\u4e2d，\u7528\u7eaf\u8f6f\u4ef6\u865a\u62df\u51fa\u4e00\u4e2a\u5b8c\u6574\u7684 ARM64 CPU \u7269\u7406\u4eff\u771f\u6c99\u7bb1，\u76f4\u63a5\u628a SO \u5e93\u4e2d\u7684\u52a0\u5bc6\u51fd\u6570\u52a0\u8f7d\u8fdb\u4eff\u771f\u5185\u5b58\u8dd1\u4e00\u904d，\u76f4\u63a5\u635e\u53d6\u6700\u7ec8\u7684\u8ba1\u7b97\u7ed3\u679c！<\/p>\n
[\u4f20\u7edf\u9006\u5411\u8fd8\u539f\u8def\u7ebf]:
\n\u6df7\u6dc6\u7684 ARM64 \u6c47\u7f16 —> \u8270\u82e6\u7684\u4eba\u5de5\u53bb\u5e73\u5766\u5316 —> \u8fd8\u539f\u6570\u5b66\u903b\u8f91 —> \u624b\u5199 Python (\u6781\u5ea6\u8017\u65f6)<\/p>\n
[Unicorn \u6a21\u62df\u6267\u884c\u8def\u7ebf]:
\n\u6df7\u6dc6\u7684 ARM64 \u6c47\u7f16 —> \u7eaf\u5185\u5b58\u76f4\u63a5\u6620\u5c04\u8fdb Unicorn \u4eff\u771f CPU —> \u8fd0\u884c 20000 \u6761\u6307\u4ee4 —> \u76f4\u63a5\u8bfb\u8fd4\u56de\u503c!
\n(\u6574\u4e2a\u8fc7\u7a0b\u5b8c\u5168\u65e0\u89c6\u4efb\u4f55\u4ee3\u7801\u6df7\u6dc6，\u8017\u65f6\u4ec5\u9700\u6570\u6beb\u79d2!)<\/p>\n
\u8981\u8ba9\u4e00\u4e2a\u539f\u672c\u4f9d\u8d56 Android \u64cd\u4f5c\u7cfb\u7edf（Linux \u5185\u6838 + Bionic Libc + ART \u865a\u62df\u673a）\u7684 Native SO \u5e93\u5728\u7eaf PC \u7aef\u8131\u673a\u8fd0\u884c\u8d77\u6765，\u5fc5\u987b\u5728\u7528\u6237\u6001\u5b8c\u6210\u56db\u5927\u73af\u5883\u865a\u62df\u5316：<\/p>\n
+————————————————————-+
\n| \u652f\u67f1 1: \u5185\u5b58\u7a7a\u95f4\u5e03\u5c40\u865a\u62df\u5316 (Memory Layout Emulation) |
\n| -> \u5229\u7528 uc.mem_map \u5206\u914d\u4eff\u771f\u5185\u5b58\u7a7a\u95f4: \u4ee3\u7801\u6bb5\u3001\u6570\u636e\u6bb5\u3001\u5806\u6808\u7a7a\u95f4 |
\n+————————————————————-+
\n |
\n v
\n+————————————————————-+
\n| \u652f\u67f1 2: ELF \u4e8c\u8fdb\u5236\u88c5\u8f7d\u4e0e\u91cd\u5b9a\u4f4d (ELF Loader & Relocation) |
\n| -> \u89e3\u6790 SO \u7684 Program Headers，\u5c06 LOAD \u6bb5\u62f7\u8d1d\u81f3\u6307\u5b9a\u57fa\u5740 |
\n+————————————————————-+
\n |
\n v
\n+————————————————————-+
\n| \u652f\u67f1 3: \u5bc4\u5b58\u5668\u73af\u5883\u521d\u59cb\u5316 (Register State Setup) |
\n| -> \u8bbe\u7f6e SP (\u6808\u9876\u6307\u9488)\u3001\u914d\u7f6e X0 (JNIEnv*)\u3001X2 (\u8f93\u5165\u53c2\u6570\u6307\u9488) |
\n+————————————————————-+
\n |
\n v
\n+————————————————————-+
\n| \u652f\u67f1 4: \u5916\u90e8\u7cfb\u7edf\u8c03\u7528\u4e0e libc \u51fd\u6570\u6253\u6869 (Hooking & Stubbing) |
\n| -> \u9488\u5bf9 malloc, memcpy, __android_log \u7b49\u5916\u90e8\u7b26\u53f7\u8fdb\u884c\u5185\u5b58\u6253\u6869 |
\n+————————————————————-+<\/p>\n
\u5047\u8bbe\u6211\u4eec\u4ece APK \u4e2d\u63d0\u53d6\u51fa\u4e86 libsecurity.so，\u9759\u6001\u9006\u5411\u5df2\u7ecf\u5b9a\u4f4d\u5230\u6838\u5fc3\u52a0\u5bc6\u51fd\u6570\u7684\u504f\u79fb\u4e3a 0x12A40\u3002\u8be5\u51fd\u6570\u662f\u4e00\u4e2a\u7eaf\u6570\u5b66\u54c8\u5e0c\u51fd\u6570，\u63a5\u6536\u4e24\u4e2a\u53c2\u6570：\u8f93\u5165\u6587\u672c\u6307\u9488\u4e0e\u6587\u672c\u957f\u5ea6\u3002<\/p>\n
\u4ee5\u4e0b\u5c55\u793a\u5b8c\u6574\u7684 Python \u8131\u673a\u6a21\u62df\u6267\u884c\u5de5\u7a0b\u4ee3\u7801\u9aa8\u67b6：<\/p>\n
from unicorn import *
\nfrom unicorn.arm64_const import *
\nfrom elftools.elf.elffile import ELFFile
\nimport struct<\/p>\n
# 1. \u865a\u62df\u5185\u5b58\u57fa\u5740\u89c4\u5212 (\u5bf9\u9f50\u5230 4KB \u9875\u9762)
\nSO_BASE_ADDR = 0x40000000 # SO \u5e93\u52a0\u8f7d\u57fa\u5740
\nSTACK_ADDR = 0x80000000 # \u865a\u62df\u6808\u57fa\u5740
\nSTACK_SIZE = 1024 * 1024 # 1MB \u6808\u7a7a\u95f4
\nHEAP_ADDR = 0x90000000 # \u865a\u62df\u5806\u7a7a\u95f4\u57fa\u5740
\nHEAP_SIZE = 1024 * 1024 # 1MB \u5806\u7a7a\u95f4<\/p>\n
def load_and_emulate_native_sign(so_path: str, input_payload: bytes) -> str:
\n print(f"[*] \u542f\u52a8 Unicorn ARM64 \u6a21\u62df\u6267\u884c\u5f15\u64ce…")
\n # \u5b9e\u4f8b\u5316 64 \u4f4d ARM \u4eff\u771f\u5f15\u64ce
\n uc = Uc(UC_ARCH_ARM64, UC_MODE_ARM)<\/p>\n
# 2. \u6620\u5c04\u865a\u62df\u6808\u4e0e\u5806
\n uc.mem_map(STACK_ADDR, STACK_SIZE)
\n uc.mem_map(HEAP_ADDR, HEAP_SIZE)
\n # \u521d\u59cb\u5316\u6808\u6307\u9488 (SP \u4f4d\u4e8e\u6808\u9876\u9ad8\u5730\u5740，\u5411\u4e0b\u589e\u957f)
\n uc.reg_write(UC_ARM64_REG_SP, STACK_ADDR + STACK_SIZE – 0x1000)<\/p>\n
# 3. \u89e3\u6790\u5e76\u6620\u5c04 ELF \u6587\u4ef6\u5404\u4e2a LOAD \u6bb5
\n print(f"[*] \u89e3\u6790\u5e76\u6620\u5c04\u76ee\u6807 SO \u6587\u4ef6: {so_path}")
\n with open(so_path, 'rb') as f:
\n elf = ELFFile(f)
\n for segment in elf.iter_segments():
\n if segment['p_type'] == 'PT_LOAD':
\n # \u9875\u9762\u5bf9\u9f50\u8ba1\u7b97
\n seg_vaddr = segment['p_vaddr']
\n seg_memsz = segment['p_memsz']
\n page_start = (SO_BASE_ADDR + seg_vaddr) & ~0xFFF
\n page_end = (SO_BASE_ADDR + seg_vaddr + seg_memsz + 0xFFF) & ~0xFFF
\n page_size = page_end – page_start<\/p>\n
# \u6620\u5c04\u5185\u5b58\u9875\u5e76\u5199\u5165\u539f\u59cb\u4e8c\u8fdb\u5236\u6570\u636e
\n uc.mem_map(page_start, page_size)
\n uc.mem_write(SO_BASE_ADDR + seg_vaddr, segment.data())<\/p>\n
# 4. \u5c06\u8f93\u5165\u53c2\u6570\u5199\u5165\u865a\u62df\u5806\u5185\u5b58\u4e2d
\n input_str_addr = HEAP_ADDR + 0x100
\n uc.mem_write(input_str_addr, input_payload + b'\\\\x00')<\/p>\n
# \u4e3a\u8f93\u51fa\u7ed3\u679c\u9884\u5206\u914d\u4e00\u4e2a\u7f13\u51b2\u533a
\n output_buf_addr = HEAP_ADDR + 0x200<\/p>\n
# 5. \u914d\u7f6e ARM64 \u51fd\u6570\u8c03\u7528\u5bc4\u5b58\u5668\u53c2\u6570 (\u9075\u5faa AAPCS \u89c4\u7ea6)
\n # \u5047\u8bbe\u76ee\u6807\u51fd\u6570\u539f\u578b: char* compute_sign(const char* input, int len, char* out_buf)
\n uc.reg_write(UC_ARM64_REG_X0, input_str_addr) # X0: \u8f93\u5165\u53c2\u6570\u6307\u9488
\n uc.reg_write(UC_ARM64_REG_X1, len(input_payload)) # X1: \u8f93\u5165\u957f\u5ea6
\n uc.reg_write(UC_ARM64_REG_X2, output_buf_addr) # X2: \u7ed3\u679c\u56de\u5199\u7f13\u51b2\u533a<\/p>\n
# \u8bbe\u7f6e\u8fd4\u56de\u94fe\u63a5\u5bc4\u5b58\u5668 LR (X30)，\u5f53\u51fd\u6570\u6267\u884c ret \u65f6\u8df3\u56de\u4e00\u4e2a\u9b54\u6570\u5730\u5740\u4f5c\u4e3a\u7ec8\u6b62\u4fe1\u53f7
\n MAGIC_EXIT_ADDR = 0x50000000
\n uc.mem_map(MAGIC_EXIT_ADDR, 0x1000)
\n uc.reg_write(UC_ARM64_REG_X30, MAGIC_EXIT_ADDR)<\/p>\n
# 6. \u6838\u5fc3\u4eff\u771f\u542f\u52a8！
\n target_func_addr = SO_BASE_ADDR + 0x12A40
\n print(f"[*] \u542f\u52a8\u673a\u5668\u7801\u6267\u884c: 0x{target_func_addr:X} —-> \u7ec8\u6b62\u9000\u51fa\u70b9: 0x{MAGIC_EXIT_ADDR:X}")<\/p>\n
# \u4eff\u771f\u6267\u884c，\u76f4\u5230 PC \u8fbe\u5230 MAGIC_EXIT_ADDR
\n uc.emu_start(target_func_addr, MAGIC_EXIT_ADDR, timeout=5000000, count=0)<\/p>\n
# 7. \u4ece\u8f93\u51fa\u7f13\u51b2\u533a\u8bfb\u53d6\u6700\u7ec8\u7684\u52a0\u5bc6\u5b57\u7b26\u4e32
\n result_bytes = uc.mem_read(output_buf_addr, 32)
\n final_sign = bytes(result_bytes).split(b'\\\\x00')[0].decode('utf-8', errors='ignore')<\/p>\n
print(f"[+] \u6a21\u62df\u6267\u884c\u6210\u529f！\u63d0\u53d6\u51fa\u8131\u673a\u52a0\u5bc6\u7ed3\u679c: {final_sign}")
\n return final_sign<\/p>\n
# \u9a8c\u8bc1\u8c03\u7528
\ntest_payload = b"timestamp=1791518400&device_id=sec_009"
\nload_and_emulate_native_sign("libsecurity.so", test_payload)<\/p>\n
\u5728\u771f\u5b9e\u7684\u590d\u6742 SO \u5e93\u4e2d，\u7b97\u6cd5\u5f80\u5f80\u4f1a\u7a7f\u63d2\u5c11\u91cf\u7684\u7cfb\u7edf\u51fd\u6570\u8c03\u7528，\u6a21\u62df\u6267\u884c\u53ef\u80fd\u4f1a\u62a5\u9519 UC_ERR_READ_UNMAPPED（\u8bbf\u95ee\u672a\u6620\u5c04\u5185\u5b58）：<\/p>\n
\u5728\u73b0\u4ee3\u4e8c\u8fdb\u5236\u5bf9\u6297\u7684\u535a\u5f08\u68cb\u5c40\u4e2d，Unicorn \u5f15\u64ce\u7684\u51fa\u73b0\u5f7b\u5e95\u91cd\u6784\u4e86\u9006\u5411\u4e0e\u53cd\u9006\u5411\u7684\u6210\u672c\u5929\u5e73\u3002\u9762\u5bf9\u52a0\u56fa\u5382\u5546\u7cbe\u5fc3\u7f16\u6392\u7684\u6570\u4e07\u884c\u4ee3\u7801\u5e73\u5766\u5316\u4e0e\u865a\u5047\u63a7\u5236\u6d41，\u9006\u5411\u5de5\u7a0b\u5e08\u4e0d\u518d\u9700\u8981\u6df1\u9677\u4e8e\u903b\u8f91\u8ff7\u5bab，\u800c\u662f\u7ad9\u5728\u4f53\u7cfb\u7ed3\u6784\u7684\u9ad8\u7ef4\u89c6\u89d2，\u501f\u529b\u6253\u529b，\u4ee5\u673a\u5668\u6307\u4ee4\u6a21\u62df\u673a\u5668\u8fd0\u7b97\u3002\u6df1\u523b\u7406\u89e3 ARM64 \u6307\u4ee4\u96c6\u7684\u5185\u5b58\u6620\u5c04\u4e0e\u8c03\u7528\u89c4\u8303，\u65b9\u80fd\u5728\u8131\u673a\u73af\u5883\u4e2d\u6e38\u5203\u6709\u4f59\u5730\u9a7e\u9a6d\u4efb\u4f55\u590d\u6742\u7684\u539f\u751f\u4e8c\u8fdb\u5236\u903b\u8f91，\u4e3a\u4e1a\u52a1\u98ce\u63a7\u4e0e\u5b89\u5168\u5ba1\u8ba1\u63d0\u4f9b\u7edd\u5bf9\u964d\u7ef4\u7684\u5206\u6790\u5229\u5203\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5728\u79fb\u52a8\u7aef\u5b89\u5168\u4e0e\u4e1a\u52a1\u98ce\u63a7\u5bf9\u6297\u4e2d，\u9006\u5411\u5de5\u7a0b\u5e08\u6700\u5e38\u9762\u5bf9\u7684\u4e00\u9053\u96be\u5173，\u83ab\u8fc7\u4e8e\u7535\u5546 App \u6838\u5fc3\u8d44\u4ea7\u6a21\u5757（\u5982\u53cc 11 \u79d2\u6740\u8bf7\u6c42\u7b7e\u540d\u751f\u6210\u3001\u9ad8\u5371\u63a5\u53e3\u8bbe\u5907\u6307\u7eb9\u52a0\u5bc6）\u7684\u9006\u5411\u8fd8\u539f\u3002\u5f00\u53d1\u56e2\u961f\u4e3a\u4e86\u5bf9\u6297\u9006\u5411，\u901a\u5e38\u4f1a\u5c06\u6838\u5fc3 C\/C \u7b97\u6cd5\u7f16\u8bd1\u8fdb Android Native SO \u5e93（\u5982 libsec_sign.so），\u5e76\u5957\u4e0a\u9ad8\u5f3a\u5ea6\u7684\u5546\u4e1a\u52a0\u56fa\u5916\u58f3：\u53cc\u5c42\u63a7\u5236\u6d41\u5e73\u5766\u5316（OL<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[66,594,50,100,51],"topic":[],"class_list":["post-115655","post","type-post","status-publish","format-standard","hentry","category-server","tag-ai","tag-web","tag-50","tag-100","tag-51"],"yoast_head":"\n