{"id":1352,"date":"2025-02-16T14:38:05","date_gmt":"2025-02-16T06:38:05","guid":{"rendered":"https:\/\/blog.shangwendada.top\/?p=1352"},"modified":"2025-02-18T14:17:08","modified_gmt":"2025-02-18T06:17:08","slug":"dptshell%e5%8a%a0%e5%9b%ba%e9%80%86%e5%90%91%e5%88%86%e6%9e%90%e4%bb%a5%e5%8f%8a%e5%8a%a0%e5%9b%ba%e6%ad%a5%e9%aa%a4%e8%af%a6%e8%a7%a3","status":"publish","type":"post","link":"https:\/\/blog.shangwendada.top\/index.php\/2025\/02\/16\/dptshell%e5%8a%a0%e5%9b%ba%e9%80%86%e5%90%91%e5%88%86%e6%9e%90%e4%bb%a5%e5%8f%8a%e5%8a%a0%e5%9b%ba%e6%ad%a5%e9%aa%a4%e8%af%a6%e8%a7%a3\/","title":{"rendered":"\u8bb0\u5f55\u4e00\u6b21\u52a0\u56fa\u9006\u5411\u5206\u6790\u4ee5\u53ca\u52a0\u56fa\u6b65\u9aa4\u8be6\u89e3"},"content":{"rendered":"

\u524d\u8a00<\/h2>\n

\u6700\u8fd1\u60f3\u8981\u91cd\u70b9\u5b66\u4e60\u4e00\u4e0b\u7c7b\u62bd\u53d6\u8fd9\u79cd\u7c7b\u578b\u7684\u52a0\u56fa\u662f\u5982\u4f55\u5b9e\u73b0\u7684\uff0c\u6545\u5728\u7f51\u4e0a\u641c\u5bfb\u3002\u6700\u7ec8\u770b\u5230\u4e86luoyesiqiu\u5927\u4f6c\u7684dpt-shell\u8fd9\u4e2a\u9879\u76ee\u3002\u5bf9\u8fd9\u4e2a\u9879\u76ee\u7814\u7a76\u540e\u53d1\u73b0\u8fd9\u4e00\u6b3e\u5f00\u6e90\u52a0\u56fa\u5df2\u7ecf\u53ef\u4ee5\u8bf4\u5f88\u6210\u719f\u4e86\u3002\u6545\u5148\u5bf9\u5176\u9006\u5411\u5206\u6790\u540e\u518d\u4ece\u4ee3\u7801\u5c42\u9762\u7814\u7a76\u5982\u4f55\u5b9e\u73b0\u7684\u3002
\n\u9879\u76ee\u5730\u5740\uff1ahttps:\/\/github.com\/luoyesiqiu\/dpt-shell<\/a>
\n\u5206\u6790\u7248\u672c\uff1aV1.12.2<\/p>\n

\u51c6\u5907\u9636\u6bb5<\/h2>\n

\u6b38\u563f\uff0c\u662f\u65f6\u5019\u8bf7\u51fa\u6765\u4e4b\u524d\u7684\u8001\u670b\u53cb\u4e86\uff08\u5728\u4e4b\u524d\u5206\u6790\u67d0\u52a0\u56fa\u65f6\u7528\u5230\u7684demo\uff09\uff0c\u7136\u540e\u91c7\u7528dptshell\u8fdb\u884c\u52a0\u56fa
\n\u975e\u5e38\u7684\u65b9\u4fbf\uff0c\u53ea\u9700\u8981\u73b0\u5728\u7f16\u8bd1\u597d\u4e86\u7684dpt.jar \u7136\u540e\u5728\u547d\u4ee4\u6846\u5ff5\u51fa\u5982\u4e0b\u5492\u8bed\uff1a<\/p>\n

java -jar dpt.jar -f \/path\/to\/apk<\/code><\/pre>\n
\u7b49\u5f85\u7a0b\u5e8f\u541f\u5531\uff1a<\/p>\n
\"file\"<\/div><\/p>\n
\u541f\u5531\u7ed3\u675f\u6211\u4eec\u5c31\u5f97\u5230\u4e86\uff1a<\/p>\n
\"file\"<\/div><\/p>\n
\uff08wow\uff0c\u592a\u8d34\u5fc3\u4e86\uff0c\u8fd8\u5e2e\u6211\u4eec\u8fdb\u884c\u4e86\u7b7e\u540d\uff09
\n\u53e6\u5916\u5982\u679c\u4e0d\u60f3\u7b7e\u540d\u53ef\u4ee5\u770b\u5982\u4e0b\u5e2e\u52a9\uff1a<\/p>\n
usage: java -jar dpt.jar [option] -f <apk>\n -c,--disable-acf      Disable app component factory(just use for debug).\n -d,--dump-code        Dump the code item of DEX and save it to .json\n                       files.\n -D,--debug            Make apk debuggable.\n -f,--apk-file <arg>   Need to protect apk file.\n -l,--noisy-log        Open noisy log.\n -x,--no-sign          Do not sign apk.<\/code><\/pre>\n
\u9006\u5411\u5206\u6790<\/h2>\n
\u58f3\u5904\u7406\u903b\u8f91\u521d\u6b65\u5206\u6790<\/h3>\n
\"file\"<\/div><\/p>\n
\u8fd9\u91cc\u53ef\u4ee5\u53d1\u73b0\u7c7b\u90fd\u5df2\u7ecf\u88ab\u62bd\u53d6\u4e86\u3002<\/p>\n
\u9996\u5148\u6211\u4eec\u53ef\u4ee5\u770b\u5230\u5de5\u5382\u7c7b\u5df2\u7ecf\u88ab\u66ff\u6362\u6210\u4e86\u58f3\u7684\u4ee3\u7406\u5de5\u5382\u7c7b<\/p>\n
\"file\"<\/div><\/p>\n
\u90a3\u4e48\u8fd9\u91cc\u5176\u5b9e\u5c31\u6d89\u53ca\u5230\u4e86\u4e00\u4e2a\u77e5\u8bc6\u70b9\uff1a
\n\u8fd9\u4e2aandroidx.core.app.AppComponentFactory\u662f\u7528\u6765\u52a8\u6001\u63a7\u5236\u7ec4\u4ef6\u793a\u4f8b\u8bdd\u7684\uff0c\u5141\u8bb8\u5728 Activity\u3001Service\u3001BroadcastReceiver\u3001ContentProvider \u7b49\u7ec4\u4ef6\u88ab\u7cfb\u7edf\u521b\u5efa\u65f6\u62e6\u622a\u5e76\u66ff\u6362\u5176\u5b9e\u4f8b\u3002dptshell\u5728\u6b64\u5904\u8fdb\u884c\u58f3so\u7684\u52a0\u8f7d\uff0c\u4ee5\u53ca\u5bf9\u4e00\u4e9b\u7cfb\u7edf\u51fd\u6570\u7684Hook\u3002
\n\u8be6\u7ec6\u7684\u6211\u4eec\u53ef\u4ee5\u7ee7\u7eed\u5f80\u4e0b\u9762\u770b
\nActivityThread.handleBindApplication()
\n\u662f\u6309\u7167\u4ec0\u4e48\u987a\u5e8f\u52a0\u8f7d APK \u5e76\u52a0\u8f7d\u5e94\u7528\u7a0b\u5e8f\u7ec4\u4ef6\u7684\u5462\uff0c\u6211\u4eec\u53ef\u4ee5\u770b\u4e0b\u56fe\uff1a<\/p>\n
\"file\"<\/div><\/p>\n
\u8fd9\u91cc\u6211\u4eec\u7740\u91cd\u8981\u770b\u7684\u5c31\u662finstantiateClassLoader\u8fd9\u4e2a\u65b9\u6cd5\u4e86\u3002<\/p>\n
\"file\"<\/div><\/p>\n
\u8fd9\u91cc\u4e3b\u8981\u8f7d\u5165\u4e86\u58f3so\uff0c\u7136\u540e\u5230\u8fbe\u4ee3\u7406Application,\u5b8c\u6210\u4e86\u6e90dex\u7684Application\u7684\u66ff\u6362\u4e86\u751f\u547d\u5468\u671f\u51fd\u6570\u7684\u8c03\u7528,\u5f00\u59cb\u8fd0\u884c\u6e90dex\u7684\u7a0b\u5e8f\u4ee3\u7801\uff0c\u5e76\u4e14\u4e3a\u4e86\u5176\u80fd\u591f\u88ab\u6b63\u5e38\u52a0\u8f7d\u505a\u5904\u7406\uff0c\u540e\u7eed\u4f1a\u5728\u6e90\u7801\u5206\u6790\u4e2d\uff0c\u8be6\u7ec6\u6765\u5206\u6790\u3002<\/p>\n
\u58f3so\u89e3\u5bc6\u5206\u6790\uff1a<\/h3>\n
\u90a3\u4e48\u5bf9\u4e8e\u6b64\u7c7b\u62bd\u53d6\u58f3\u7684\u5206\u6790\uff0c\u5f53\u7136\u662f\u8981\u4eceNative\u5c42\u5165\u624b\u4e86\u3002<\/p>\n
\"file\"<\/div><\/p>\n
\u8fd9\u91cc\u6211\u4eec\u9009\u62e9\u5206\u6790arm64\u67b6\u6784\u4e0b\u7684dpt.so
\n\u8fd9\u91cc\u6211\u4eec\u76f4\u63a5IDA\u6253\u5f00\u4f1a\u53d1\u73b0ELF\u6587\u4ef6\u4e2dbitcode\u6bb5\u90fd\u88ab\u52a0\u5bc6\u4e86<\/p>\n
\"file\"<\/div><\/p>\n
\u9759\u6001\u89e3\u5bc6bitcode\u6bb5\uff1a<\/h4>\n
\u4e00\u822c\u51fa\u73b0\u8fd9\u79cd\u60c5\u51b5\u6211\u4eec\u5c31\u9700\u8981\u5728\u4eceinitArray\u6bb5\u5165\u624b\u5206\u6790\u4e86\uff0c\u5e94\u4e3ainitArray\u6bb5\u6267\u884c\u7684\u662f\u6784\u9020\u51fd\u6570\uff0c\u5728loadlibray\u4e4b\u540e\u5c31\u4f1a\u7acb\u9a6c\u88ablinker\u6240\u6267\u884c\u3002
\n\u6b63\u597d\u6211\u4eec\u5728initArray \u6bb5\u7684sub_C67C\u51fd\u6570\u4e2d\u53d1\u73b0\u4e86\u5982\u4e0b\u51fd\u6570\uff1a<\/p>\n
\"file\"<\/div><\/p>\n
\u51fd\u6570\u76f4\u63a5\u5c31\u4ee5bitCode\u4f5c\u4e3a\u53c2\u6570\u4e86\uff0c\u5b9e\u5c5e\u53ef\u7591<\/p>\n
\"file\"<\/div><\/p>\n
sectionName\u88ab\u4f20\u5165\u4e86sub_FD4C,\u8fd9\u91cc\u5c31\u662f\u5728\u5bfb\u627ebitcode\u6bb5\u7684\u5730\u5740\uff0c\u597d\u5bf9\u5176\u8fdb\u884c\u540e\u7eed\u7684\u5904\u7406<\/p>\n
\"file\"<\/div><\/p>\n
\u5728sub_EB7C\u5bf9\u5185\u5b58\u9875\u7684\u6743\u9650\u8fdb\u884c\u4fee\u6539\uff0c\u6211\u4eec\u53ef\u4ee5\u5728segment\u7a97\u53e3\u4e2d\u770b\u5230bitcode\u6bb5\u7684\u6743\u9650\u662f\u4e0d\u53ef\u5199\u7684\uff0c\u6240\u4ee5\u8981\u901a\u8fc7mprotect\u6765\u4fee\u6539\u5185\u5b58\u9875\u7684\u6743\u9650\uff0c\u65b9\u4fbf\u5bf9\u4ee3\u7801\u8fdb\u884c\u52a8\u6001\u89e3\u5bc6\u3002<\/p>\n
\"file\"<\/div>
\n
\"file\"<\/div><\/p>\n
\u90a3\u4e48\u4e0a\u9762\u5206\u6790\u5b8c\u4e86\uff0c\u5185\u5b58\u9875\u6743\u9650\u4fee\u6539\u5b8c\u4e86\uff0c\u63a5\u4e0b\u6765\u8981\u505a\u7684\u5c31\u662f\u5bf9\u5185\u5b58\u4e2d\u88ab\u52a0\u5bc6\u7684\u5b57\u8282\u8fdb\u884c\u89e3\u5bc6\u4e86\uff0c<\/p>\n
\"file\"<\/div><\/p>\n
\u6d41\u7a0b\u4e0a\u6765\u770b\u80af\u5b9a\u5c31\u662f\u8fd9\u4e24\u4e2a\u4e86\u3002<\/p>\n
\"file\"<\/div><\/p>\n
\"file\"<\/div><\/p>\n
\u76f8\u4fe1\u5927\u5bb6\u90fd\u80fd\u4e00\u773c\u770b\u51fa\u6765\u8fd9\u4e2a\u662f\u4e00\u4e2aRC4\u5427\u3002
\n\u6839\u636e\u4e0b\u9762\u7684\u53c2\u6570\u53ef\u4ee5\u627e\u5230key<\/p>\n
\"file\"<\/div><\/p>\n
\u8fd9\u91cc\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0ckey\u7684\u957f\u5ea6\u88ab\u9650\u5b9a\u5230\u4e8616\uff0c\u6211\u4eec\u5728\u5199\u4ee3\u7801\u7684\u65f6\u5019\u4e0d\u80fd\u7528lenkey\uff0c\u56e0\u4e3akey\u540e\u9762\u5f88\u591a0\u3002
\n\u4f7f\u7528idapython\u89e3\u5bc6bitcode\u6bb5\uff1a<\/p>\n
import idc\nimport ida_segment\nimport idautils\n\ndef rc4_decrypt(key, data):\n    """RC4\u89e3\u5bc6\u5b9e\u73b0"""\n    S = list(range(256))\n    j = 0\n    out = []\n\n    # KSA\u521d\u59cb\u5316\n    for i in range(256):\n        j = (j + S[i] + key[i % 16]) % 256\n        S[i], S[j] = S[j], S[i]\n\n    # PRGA\u751f\u6210\u5bc6\u94a5\u6d41\u5e76\u89e3\u5bc6\n    i = j = 0\n    for byte in data:\n        i = (i + 1) % 256\n        j = (j + S[i]) % 256\n        S[i], S[j] = S[j], S[i]\n        k = S[(S[i] + S[j]) % 256]\n        out.append(byte ^ k)\n    return bytes(out)\n\ndef decrypt_bitcode():\n    # \u914d\u7f6e\u76ee\u6807\u6bb5\u540d\uff08\u6839\u636e\u6b65\u9aa41\u7ed3\u679c\u4fee\u6539\uff09\n    target_segment = ".bitcode"  # \u4fee\u6539\u4e3a\u4f60\u7684\u6bb5\u540d\n\n    # \u83b7\u53d6\u6bb5\u5bf9\u8c61\n    seg = ida_segment.get_segm_by_name(target_segment)\n    if not seg:\n        print(f"[!] \u9519\u8bef\uff1a\u672a\u627e\u5230\u6bb5 '{target_segment}'")\n        return\n\n    start_ea = seg.start_ea\n    end_ea = seg.end_ea\n    print(f"[*] \u627e\u5230\u6bb5 {target_segment}: 0x{start_ea:X}-0x{end_ea:X}")\n\n    # \u8bfb\u53d6\u52a0\u5bc6\u6570\u636e\n    encrypted_data = idc.get_bytes(start_ea, end_ea - start_ea)\n    if not encrypted_data:\n        print("[!] \u9519\u8bef\uff1a\u65e0\u6cd5\u8bfb\u53d6\u6bb5\u6570\u636e")\n        return\n\n    # \u5b9a\u4e49RC4\u5bc6\u94a5\n    rc4_key = bytes([\n        0xE5, 0x5E, 0x5A, 0x20, 0x2C, 0x25, 0xD9, 0x1C, 0x72, 0x74,\n        0x2E, 0x36, 0x99, 0x02, 0x80, 0x06, 0x00, 0x00, 0x00, 0x00,\n        0x00, 0x00, 0x00\n    ])\n\n    # \u6267\u884c\u89e3\u5bc6\n    decrypted_data = rc4_decrypt(rc4_key, encrypted_data)\n    print("[+] \u89e3\u5bc6\u5b8c\u6210\uff0c\u6b63\u5728\u5199\u56deIDA\u6570\u636e\u5e93...")\n\n    # \u4e34\u65f6\u4fee\u6539\u6bb5\u6743\u9650\u4e3a\u53ef\u5199\n    original_perms = idc.get_segm_attr(start_ea, idc.SEGATTR_PERM)\n    idc.set_segm_attr(start_ea, idc.SEGATTR_PERM, 0x7)  # RWX\n\n    # \u9010\u5b57\u8282\u4fee\u8865\u6570\u636e\n    for offset, byte in enumerate(decrypted_data):\n        idc.patch_byte(start_ea + offset, byte)\n\n    # \u6062\u590d\u6bb5\u6743\u9650\n    idc.set_segm_attr(start_ea, idc.SEGATTR_PERM, original_perms)\n\n    print("[+] \u89e3\u5bc6\u6570\u636e\u5df2\u6210\u529f\u5199\u5165\uff0c\u5efa\u8bae\u91cd\u65b0\u5206\u6790\u4ee3\u7801\u533a\u57df\uff01")\n    print("    \u64cd\u4f5c\u5b8c\u6210\uff01")\n\n# \u6267\u884c\u89e3\u5bc6\u51fd\u6570\ndecrypt_bitcode()<\/code><\/pre>\n
\u6267\u884c\u5b8c\u540e\u4fdd\u5b58\u518d\u91cd\u8f7d\u6587\u4ef6\u4f1a\u770b\u5230bitcode\u6bb5\u4ee3\u7801\u88ab\u6210\u529f\u8bc6\u522b\u4e86\uff1a<\/p>\n
\"file\"<\/div><\/p>\n
\u5185\u5b58\u4e2ddump\u89e3\u5bc6\u4e86\u7684bitcode\uff1a<\/h4>\n
Dump SO\u7684\u8bdd\uff0c\u4e0d\u7ba1\u4f60\u7528GDA\u4e5f\u597d\uff0c\u8fd8\u662f\u4ec0\u4e48\u5c0f\u5de5\u5177\u90fd\u53ef\u4ee5\uff0c\u6211\u8fd9\u91cc\u5c55\u793afrida\u7684\u3002
\nfrida\u7684\u8bdd\u9996\u5148\u8fd8\u662f\u5f97hook dlopen\u627e\u5230dlopen\u6253\u5f00\u6211\u4eec\u9700\u8981dump\u7684so\u7684\u65f6\u673a\uff0c\u7136\u540e\u5c31\u53ef\u4ee5\u5f00\u59cb\u83b7\u53d6so\u7684Base\u548cSize\u4e86\u5177\u4f53\u5b9e\u73b0\u5982\u4e0b\uff1a<\/p>\n
function my_hook_dlopen(soName,index) {\n    \/\/mapsRedirect();\n    \/\/hook_memcmp_addr();\n    Interceptor.attach(Module.findExportByName(null, "android_dlopen_ext"),\n        {\n            onEnter: function (args) {\n                var pathptr = args[0];\n                if (pathptr !== undefined && pathptr != null) {\n                    var path = ptr(pathptr).readCString();\n                    if (path.indexOf(soName) >= 0) {\n                        this.is_can_hook = true;\n                    }\n                }\n            },\n            onLeave: function (retval) {\n                if (this.is_can_hook) {\n                    if (index == 1) {\n                        NativeFunc();\n                        dump_so(soName);\n                    } else {\n                        dump_so2(soName);\n                    }\n\n                }\n            }\n        }\n    );\n}\n\nfunction dump_so2(so_name) {\n    var libso = Process.getModuleByName(so_name);\n    console.log("[name]:", libso.name);\n    console.log("[base]:", libso.base);\n    console.log("[size]:", ptr(libso.size));\n    console.log("[path]:", libso.path);\n    var file_path = "\/sdcard\/Download\/" + libso.name + "_" + libso.base + "_" + ptr(libso.size) + ".so";\n    var file_handle = new File(file_path, "wb");\n    if (file_handle && file_handle != null) {\n        Memory.protect(ptr(libso.base), libso.size, 'rwx');\n        var libso_buffer = ptr(libso.base).readByteArray(libso.size);\n        file_handle.write(libso_buffer);\n        file_handle.flush();\n        file_handle.close();\n        console.log("[dump]:", file_path);\n    }\n\n}\n\nfunction dump_so(so_name) {\n    var libso = Process.getModuleByName(so_name);\n    console.log("[name]:", libso.name);\n    console.log("[base]:", libso.base);\n    console.log("[size]:", ptr(libso.size));\n    console.log("[path]:", libso.path);\n    var file_path = "\/data\/data\/cn.pbcdci.fincryptography.appetizer\/" + libso.name + "_" + libso.base + "_" + ptr(libso.size) + ".so";\n    var file_handle = new File(file_path, "wb");\n    if (file_handle && file_handle != null) {\n        Memory.protect(ptr(libso.base), libso.size, 'rwx');\n        var libso_buffer = ptr(libso.base).readByteArray(libso.size);\n        file_handle.write(libso_buffer);\n        file_handle.flush();\n        file_handle.close();\n        console.log("[dump]:", file_path);\n    }\n}\n\nsetImmediate(my_hook_dlopen("libdpt.so",2));<\/code><\/pre>\n
\u8fd9\u91ccdump_so 1\u548c2\u7684\u533a\u522b\u5728\u4e8e\u4e00\u4e2a\u662fdump\u5230\u79c1\u6709\u76ee\u5f55\uff0c\u53e6\u4e00\u4e2a\u662fsdcard\uff0c\u5230sdcard\u662f\u4e3a\u4e86\u65b9\u4fbf\u6211\u4eecpull\uff0c\u6240\u4ee5\u6211\u9ed8\u8ba4\u4f7f\u75282\u3002<\/p>\n
\u542f\u52a8\uff01<\/p>\n
\"file\"<\/div><\/p>\n
\u6b38\u563f\uff0c\u867d\u7136sodump\u4e0b\u6765\u4e86\u4f46\u662f\u5c45\u7136\u5d29\u6e83\u4e86\uff0c\u663e\u7136\u662ffrida\u88ab\u68c0\u6d4b\u4e86\uff0c\u4f46\u662f\u95ee\u9898\u4e0d\u5927\u6211\u4eec\u7a0d\u540e\u5206\u6790\u3002
\n\u5148\u770b\u770bdump\u4e0b\u6765\u7684so\uff0cdump\u7684\u5185\u5b58\u4e2d\u7684SO\u901a\u5e38IDA\u662f\u6ca1\u6709\u529e\u6cd5\u8bc6\u522b\u51fa\u5bfc\u5165\u5bfc\u51fa\u8868\u548c\u4e00\u4e9b\u5b57\u7b26\u7684\uff0c\u9700\u8981\u7528SOFixer\u6765\u4fee\u6b63\uff1a
\n\u6ce8\u610f-m\u7684\u53c2\u6570\u662f\u6211\u4eecso\u5728\u5185\u5b58\u4e2d\u7684\u57fa\u5730\u5740\u3002<\/p>\n
D:\\Tool\\SoFixer\\SoFixer-Windows-64.exe -s E:\\\u6587\u7ae0\\dpt-shell\u5206\u6790\\\u52a8\u6001\\libdpt.so_0x768ae0e000_0xcc000.so  -o libdpt.so -m 0x768ae0e000 -d<\/code><\/pre>\n
\"file\"<\/div><\/p>\n
\u8fd9\u6837\u5c31\u662f\u4fee\u590d\u597d\u4e86\uff0c\u6253\u5f00IDA\u68c0\u67e5\u4e00\u4e0b\uff1a<\/p>\n
\"file\"<\/div><\/p>\n
\u53d1\u73b0\u5df2\u7ecf\u6ca1\u6709bitcode\u6bb5\u4e86\uff0c\u53ef\u80fd\u662f\u7531\u4e8esection\u8282\u4e0d\u5b8c\u6574\uff0c\u4f46\u662f\u5bf9\u5e94\u7684\u4ee3\u7801\u80af\u5b9a\u662f\u88ab\u89e3\u5bc6\u7684\uff1a<\/p>\n
\"file\"<\/div><\/p>\n
\u4f46\u662f\u4f9d\u65e7\u51fa\u73b0\u4e86\u4e00\u4e9bIDA\u8bc6\u522b\u5931\u8bef\u7684\u95ee\u9898\uff0c\u4f46\u8fd9\u90fd\u4e0d\u662f\u5f71\u54cd\uff0c\u80fd\u591f\u6b63\u5e38\u7684\u67e5\u770b\u4ee3\u7801\u3002<\/p>\n
FRIDA\u68c0\u6d4b\u7ed5\u8fc7\uff1a<\/h3>\n
\u4e4b\u524d\u5728DumpSO\u7684\u65f6\u5019\u5c31\u53d1\u73b0\u4e86\u5b58\u5728Frida\uff0c\u68c0\u6d4b\u3002<\/p>\n
\"file\"<\/div><\/p>\n
\u5728initArray\u7684\u8c03\u7528\u4e2d\u53ef\u4ee5\u770b\u5230\u6b64\u5904\u521b\u5efa\u4e86\u4e00\u4e2a\u7ebf\u7a0b\uff0c\u6211\u4eec\u770b\u770b\u7ebf\u7a0b\u51fd\u6570\u662f\u4ec0\u4e48\uff1a<\/p>\n
\"file\"<\/div><\/p>\n
\u68c0\u6d4bfrida\u7684\u5173\u952e\u5b57\uff0c\u8fd9\u5c31\u597d\u8bf4\u4e86\u3002<\/p>\n
\"file\"<\/div><\/p>\n
\u903b\u8f91\u4e2d\u68c0\u6d4b\u53ef\u4ee5\u53d1\u73b0\u5c31\u662f\u904d\u5386\u5b57\u7b26\u4e32\u626b\u63cf
\nsub_100E0\u662f\u81ea\u5b9e\u73b0\u7684\u4e00\u4e2astrstr<\/p>\n
\"file\"<\/div><\/p>\n
\u53ef\u4ee5\u770b\u5230\u5f88\u7ecf\u5178\u7684\u9010\u5b57\u8282\u5339\u914d\u7b97\u6cd5\u3002\u5728\u957f\u4e32\u4e2d\u5bfb\u627e\u5b57\u4e32
\n\u6240\u4ee5\u8fd9\u4e2a\u68c0\u6d4b\u51fd\u6570\u7684\u529f\u80fd\u5c31\u662f\u901a\u8fc7\u904d\u5386maps\uff0c\u5bfb\u627e\u662f\u5426\u51fa\u73b0\u4e86frida-agent\u7684\u7279\u62db\uff0c\u5982\u679c\u5b58\u5728\u7279\u5f81\u5c31\u76f4\u63a5\u8fdb\u884c\u5d29\u6e83\uff0c\u8fd9\u91cc\u505a\u7684\u597d\u7684\u5730\u65b9\u5c31\u662f\u901a\u8fc7\u81ea\u5df1\u5b9e\u73b0\u7684strstr\u6765\u904d\u5386maps\uff0c\u53ef\u4ee5\u9632\u6b62\u76f4\u63a5\u901a\u8fc7hook strstr\u6765\u9632\u6b62\u68c0\u6d4b\uff0c\u4f46\u662ffrida-agent\u8fd9\u4e2a\u7279\u5f81\u4e32\u5c45\u7136\u662f\u660e\u6587\u5b58\u50a8\u5728\u5185\u5b58\u4e2d\uff0c\u5b9e\u5c5e\u4e0d\u8be5\u3002<\/p>\n
\"file\"<\/div><\/p>\n
\u4ed6\u4eec\u68c0\u6d4b\u5230\u4e4b\u540e\u90fd\u8c03\u7528\u4e86\u540c\u4e00\u4e2a\u51fd\u6570\uff0c\u8fd9\u4e2a\u51fd\u6570\u5c31\u662f\u5904\u7406\u68c0\u6d4b\u5230frida\u4e4b\u540e\u7684\u5d29\u6e83\u903b\u8f91\u7684\u3002<\/p>\n
\"file\"<\/div><\/p>\n
\u70b9\u5f00\u53d1\u73b0\u6ca1\u6709\u4e1c\u897f\uff0c\u9700\u8981\u67e5\u770b\u6c47\u7f16\u4ee3\u7801\uff1a<\/p>\n
\"file\"<\/div><\/p>\n
X30\u5bc4\u5b58\u5668\u5728ARM64\u4e2d\u76f8\u5f53\u4e8ersp\uff0c\u5728ret\u4e4b\u524d\u50a8\u5b58\u7684\u662f\u8fd4\u56de\u5730\u5740\uff0c\u8fd9\u91cc\u51fd\u6570\u5c06X30\u8d4b\u503c\u4e3a0\u4e4b\u540e\u5c31\u4f1a\u4ea7\u751f\u4e00\u4e2a Process crashed: Bad access due to invalid address \u7684\u62a5\u9519\uff0c\u5bfc\u81f4\u7a0b\u5e8f\u5d29\u6e83\u3002
\n\u90a3\u4e48\u65e2\u7136\u8fd9\u6837\uff0c\u6211\u4eec\u76f4\u63a5\u7528\u4e00\u4e2a\u7a7a\u51fd\u6570\u5c06\u5176\u66ff\u6362\u6389\u5c31\u597d\u4e86\u3002<\/p>\n
function antiDetectFrida(Base) {\n    var crashAddr = Base.add("0x4E864");\n\n    var originalFunc = new NativeFunction(crashAddr, 'void', []);\n    Interceptor.replace(originalFunc, new NativeCallback(function () {\n    \/\/    console.log("[Replaced] - Empty function executed");\n        console.log('sub_4E894 called from:\\n' + Thread.backtrace(this.context, Backtracer.FUZZY).map(DebugSymbol.fromAddress).join('\\n') + '\\n');\n\n    }, 'void', []));\n}<\/code><\/pre>\n
\u5b8c\u6574\uff1a<\/p>\n
function antiDetectFrida(Base) {\n    var crashAddr = Base.add("0x4E864");\n\n    var originalFunc = new NativeFunction(crashAddr, 'void', []);\n    Interceptor.replace(originalFunc, new NativeCallback(function () {\n    \/\/    console.log("[Replaced] - Empty function executed");\n        console.log('sub_4E894 called from:\\n' + Thread.backtrace(this.context, Backtracer.FUZZY).map(DebugSymbol.fromAddress).join('\\n') + '\\n');\n\n    }, 'void', []));\n}\n\nfunction NativeFunc() {\n    console.info("[Hook Beging]");\n    var Base = Module.getBaseAddress("libdpt.so");\n    console.warn("[Base]->", Base);\n    antiDetectFrida(Base);\n}\n\nfunction hook_android_dlopen_ext() {\n    var isHook = false;\n    Interceptor.attach(Module.findExportByName(null, "android_dlopen_ext"), {\n        onEnter: function (args) {\n            this.name = args[0].readCString();\n            if (this.name.indexOf("libdpt.so") > 0) {\n                console.log(this.name);\n                var symbols = Process.getModuleByName("linker64").enumerateSymbols();\n                var callConstructorAdd = null;\n                for (var index = 0; index < symbols.length; index++) {\n                    const symbol = symbols[index];\n                    if (symbol.name.indexOf("__dl__ZN6soinfo17call_constructorsEv") != -1) {\n                        callConstructorAdd = symbol.address;\n                    }\n                }\n                console.log("callConstructorAdd -> " + callConstructorAdd);\n                Interceptor.attach(callConstructorAdd, {\n                    onEnter: function (args) {\n                        if (!isHook) {\n                            NativeFunc();\n                            isHook = true;\n                        }\n                    },\n                    onLeave: function () { }\n                });\n\n            }\n        }, onLeave: function () { }\n    });\n}\n\nsetImmediate(hook_android_dlopen_ext);<\/code><\/pre>\n
\"file\"<\/div><\/p>\n
\u8fd9\u6837\u6211\u4eec\u5c31\u6210\u529fhook\u4e0a\u7a0b\u5e8f\u4e86\u3002<\/p>\n
DEX\u586b\u5145\u5206\u6790\uff1a<\/h3>\n
\u9996\u5148\u6211\u4eec\u9700\u8981\u77e5\u9053\u62bd\u53d6\u58f3\uff0c\u80af\u5b9a\u662f\u8981\u5bf9dex\u5904\u7406\u5e76\u4e14\u56de\u586bCodeItem\u7684\uff0c\u90a3\u4e48\u7a0b\u5e8f\u80af\u5b9a\u662f\u8981\u5bf9DefineClass\u6216\u8005loadMEthod\u6765\u5728\u6267\u884c\u65b9\u6cd5\u4e4b\u524d\u56de\u586b\u6b63\u786e\u7684\u5b57\u8282\u7801\uff0c\u90a3\u4e48\u8ba9\u6211\u4eec\u770b\u4e00\u4e0b\u5728\u6267\u884c\u4e00\u4e2aJava\u65b9\u6cd5\u65f6\u7684\u8c03\u7528\u94fe\uff08\u590d\u5236\u81ealuoyesiqiu\u535a\u5ba2\uff09\uff1a<\/p>\n
ClassLoader.java::loadClass -> DexPathList.java::findClass -> DexFile.java::defineClass -> class_linker.cc::LoadClass -> class_linker.cc::LoadClassMembers -> class_linker.cc::LoadMethod<\/code><\/pre>\n
\u90a3\u4e48\u65e2\u7136\u8fd9\u6837\uff0c\u6211\u4eec\u601d\u8def\u5c31\u5f88\u660e\u786e\u4e86\uff0c\u770b\u770b\u7a0b\u5e8f\u5728\u54ea\u91cc\u6ce8\u518c\u7684hook\u5c31\u597d\u4e86\u3002<\/p>\n
\"file\"<\/div><\/p>\n
\u8fd9\u4e2a\u51fd\u6570\u5c31\u975e\u5e38\u7684\u50cf\u4e86\uff0c\u8fd9\u91cc\u5927\u5bb6\u51ed\u501f\u7ecf\u9a8c\u5e94\u8be5\u662f\u53ef\u4ee5\u731c\u6d4b\u51fa\u5728\u8fdb\u884chook\u4e86\uff0c\u4f46\u662f\u8fd9\u91cc\u4f3c\u4e4e\u662f\u4f7f\u7528\u4e86\u4e24\u4e2ahook\u6846\u67b6\uff0c\u53ef\u4ee5\u5c1d\u8bd5\u6062\u590d\u4e00\u4e0b\u7b26\u53f7<\/p>\n
\u9996\u5148\u6211\u4eec\u8fd8\u662f\u5148\u6ce8\u610f\u4e00\u4e0b\u5982\u4e0b\u683c\u5f0f<\/p>\n
\"file\"<\/div><\/p>\n
\u662f\u5426\u60f3\u8d77
\nhttps:\/\/github.com\/bytedance\/android-inline-hook<\/a>
\nshadowhook\u7684\u6ce8\u518chook\u683c\u5f0f\u5462<\/p>\n
#include "shadowhook.h"\n\nvoid *shadowhook_hook_func_addr(\n    void *func_addr,\n    void *new_addr,\n    void **orig_addr);\n\nvoid *shadowhook_hook_sym_addr(\n    void *sym_addr,\n    void *new_addr,\n    void **orig_addr);\n\nvoid *shadowhook_hook_sym_name(\n    const char *lib_name,\n    const char *sym_name,\n    void *new_addr,\n    void **orig_addr);\n\ntypedef void (*shadowhook_hooked_t)(\n    int error_number,\n    const char *lib_name,\n    const char *sym_name,\n    void *sym_addr,\n    void *new_addr,\n    void *orig_addr,\n    void *arg);\n\nvoid *shadowhook_hook_sym_name_callback(\n    const char *lib_name,\n    const char *sym_name,\n    void *new_addr,\n    void **orig_addr,\n    shadowhook_hooked_t hooked,\n    void *hooked_arg);\n\nint shadowhook_unhook(void *stub);<\/code><\/pre>\n
\u90a3\u5c31\u53ef\u4ee5\u5927\u80c6\u731c\u6d4bshadowhook\uff0c\u6216\u8005\u5229\u7528shadowhook\u7684\u6a21\u677f\u4e86\u3002
\n\u6211\u4eec\u76f4\u63a5\u641e\u4e00\u4e2alibshadowhook.so\uff0c\u81ea\u5df1\u7f16\u8bd1\u6216\u8005\u53bb\u73b0\u6210\u7684app\u91cc\u9762\u641e\u90fd\u662f\u53ef\u4ee5\u7684\uff0c\u6211\u4eec\u53ea\u9700\u8981\u5229\u7528bindiff\u6765\u8f7d\u5165\u7b26\u53f7\u5c31\u597d\u4e86\uff0c\u7c7b\u4f3c\u7684\u64cd\u4f5c\u53ef\u4ee5\u5728
\nhttps:\/\/bbs.kanxue.com\/thread-285152.htm#msg_header_h2_4<\/a>
\n\u4e2d\u8be6\u7ec6\u67e5\u9605\uff0c\u6211\u8fd9\u91cc\u5c31\u7b80\u5355\u7684\u6982\u8ff0\u4e00\u4e0b\uff1a<\/p>\n
\"file\"<\/div><\/p>\n
\u8fd9\u91cc\u76f4\u63a5\u5c31\u80fd\u770b\u51fa\u6765\u58f3\u7528\u7684\u57fa\u672c\u8fd8\u662fshadowhook\u7684\u6846\u67b6\uff0c\u4f46\u662f\u662f\u5b58\u5728\u6539\u52a8\u7684\uff0c\u5176\u5b9e\u5230\u8fd9\u91cc\u6062\u590d\u7b26\u53f7\u7684\u610f\u4e49\u4ee5\u53ca\u4e0d\u5927\u4e86\u3002<\/p>\n
sub_1F640\u7684\u90a3\u4e2a\u53c2\u6570\u80af\u5b9a\u5c31\u662f\u6ce8\u518c\u7684hook\uff0c\u4f46\u662f\u8fd9\u4e2a\u65f6\u5019\u6211\u4eec\u53c8\u8be5\u53d1\u73b0\u95ee\u9898\u4e86\uff1a<\/p>\n
\"file\"<\/div><\/p>\n
\u600e\u4e48hookDefineClass\u4e0d\u662f\u8fd9\u4e2a\u677f\u5b50\u4e86\uff0c\u770b\u8d77\u6765\u4e5f\u4e0d\u50cf\u662fShadowHook\u4e86<\/p>\n
\"file\"<\/div><\/p>\n
\u4f46\u662f\u6211\u4eec\u770b\u8fd9\u4e2a\u5199\u6cd5\uff0c\u663e\u7136\u8fd8\u662f\u5728\u505ahook\u3002\u90a3\u4e48\u6211\u4eec\u5c31\u5e94\u8be5\u77e5\u9053
\nsub_4DAC0
\n\u8fd9\u4e2a\u5c31\u662f\u5728DefineClass\u4e4b\u524d\u901a\u8fc7hook\u6267\u884c\u7684\u51fd\u6570\u4e86\uff0c\u8fd9\u91cc\u5927\u6982\u7387\u4e5f\u5c31\u662f\u5bf9Dex\u8fdb\u884c\u586b\u5145\u4e86\u3002<\/p>\n
\"file\"<\/div><\/p>\n
\u8fd9\u4e2a\u64cd\u4f5c\u4e5f\u662f\u975e\u5e38\u6a21\u677f\u7684\u64cd\u4f5c\u4e86\uff0c\u5728\u6211\u4eec\u6267\u884c\u5b8chook\u4e4b\u540e\u8fd8\u662f\u9700\u8981\u8fd8\u539f\u73b0\u573a\u7684\uff0c\u6240\u4ee5return\u56de\u4e86\u539f\u672c\u8bb0\u5f55\u7684originMethod\u3002\u90a3\u4e48sub_4D608(a3, a6, a7);\u80af\u5b9a\u6709\u4e00\u4e2a\u53c2\u6570\u662fDexFile\u4e86\uff0c\u6211\u4eec\u53ea\u9700\u8981\u5728\u8fd9\u4e2a\u51fd\u6570\u4e4b\u540e\u5229\u7528frida\u4ecb\u5165\u5c31\u597d\u4e86\u3002<\/p>\n
\u53e6\u5916\u6307\u7684\u6ce8\u610f\u7684\u662f\uff0c\u6211\u4eec\u8981\u5206\u6790\u8fd9\u4e2asdk\u7684\u7248\u672c\uff0c\u4ed6\u8fd9\u91ccsdk\u7248\u672c\u5927\u4e8e22\u8d70\u7684\u662f\u4e0b\u9762\u7684hook\u5c0f\u4e8e22\u8d70\u7684\u662f\u4e0a\u9762\u7684hook\uff0c\u4e0d\u8981hook\u9519\u4e86\u3002<\/p>\n
\u540e\u9762\u5c31\u662fsub_4D608\u7684\u903b\u8f91\u4e86
\n\u903b\u8f91\u4e2d\u53ef\u4ee5\u7ffb\u627e\u5230<\/p>\n
\"file\"<\/div><\/p>\n
\u8bfb\u53d6\u4e86\u9759\u6001\u8d44\u6e90\uff0c\u90a3\u4e48\u65e2\u7136\u662f\u62bd\u53d6\u58f3\u80af\u5b9a\u662f\u8981\u4eceAssets\u4e2d\u53bb\u8bfb\u7684\u3002\u6240\u4ee5\u57fa\u672c\u53ef\u4ee5\u731c\u6d4b\u8fd9\u91cc\u662f\u6709\u5bf9DexFile\u5904\u7406\u7684\u903b\u8f91\u4e86\u3002<\/p>\n
\"file\"<\/div><\/p>\n
\u8fd9\u91cc\u5728\u5bf9\u4e0d\u540c\u7248\u672c\u7684SDK\u7248\u672c\u505a\u4e0d\u540c\u7684\u5904\u7406\u3002<\/p>\n
\u53e6\u5916\u6709\u4e00\u4e2a\u975e\u5e38\u6307\u7684\u6ce8\u610f\u7684\u5730\u65b9\uff0c\u5c31\u662f\u5904\u7406\u6587\u4ef6\u4f20\u5165\u7684\u65f6\u5019\uff0c\u9996\u5148\u6211\u4eec\u80af\u5b9a\u662f\u8981\u8fdb\u884c\u7a7a\u6307\u9488\u5224\u65ad\u7684\uff0c\u8fd9\u91cc\u5bf9\u5e94\u7684\u5730\u65b9\u5219\u662f\uff1a<\/p>\n
\"file\"<\/div><\/p>\n
\u90a3\u4e48\u8fd9\u91cc\u6211\u4eec\u5c31\u53ef\u4ee5\u53d1\u73b0\uff0ca2\u5176\u5b9e\u5c31\u662fDexfile\u7684\u6307\u9488\u4e86\u3002<\/p>\n
\u90a3\u4e48\u8fd9\u91cc\u6211\u4eec\u53ea\u9700\u8981\u5728sub_4D608\u6267\u884c\u5b8c\u4e4b\u540e\u89e3\u6790\u4f20\u5165\u65f6\u7684a4\u5373\u53ef\uff1a
\n
\"file\"<\/div><\/p>\n
\u65e2\u7136\u8981\u89e3\u6790\u8fd9\u4e2aDexFile\uff0c\u90a3\u4e48\u6211\u4eec\u4e0d\u59a8\u770b\u770b\u8fd9\u4e2aDexFile\u5bf9\u8c61\u7684\u7ed3\u6784<\/p>\n
DexFile::DexFile(\n    const uint8_t* base,             \/\/dex\u6587\u4ef6\u57fa\u5740\n    size_t size,                             \/\/  dex\u6587\u4ef6\u957f\u5ea6\n    const uint8_t* data_begin,\n    size_t data_size,\n    const std::string& location,\n    uint32_t location_checksum,\n    const OatDexFile* oat_dex_file,\n    std::unique_ptr<DexFileContainer> container,\n    bool is_compact_dex\n)<\/code><\/pre>\n
\u7b2c\u4e00\u4e2a\u662f\u57fa\u5730\u5740\uff0c\u7b2c\u4e8c\u4e2a\u662f\u957f\u5ea6\uff0c\u90a3\u4e48\u53ea\u9700\u8981\u8fd9\u4e24\u4e2a\u6211\u4eec\u5c31\u53ef\u4ee5dump\u4e0b\u6765\u5b8c\u6574\u7684dexfile\u4e86\uff0c\u90a3\u4e48\u8fd9\u4e2a\u65f6\u5019\u6211\u4eec\uff0c\u4f7f\u7528\u5982\u4e0b\uff08frida\u4ee3\u7801spwn\u542f\u52a8\uff0c\u6ce8\u610fdlopen\u65f6\u673a\uff0c\u6211\u8fd9\u91cc\u5c31\u53ea\u662f\u7c98\u8d34\u90e8\u5206\u4ee3\u7801\u4e86\uff09<\/p>\n
function analysisDex(Base) {\n\n    var originalDefineClass = Base.add("0x4DB44");\n    console.log("originalDefineClassAddr->", originalDefineClass)\n    Interceptor.attach(originalDefineClass, {\n        onEnter: function (args) {\n            this.dex_file = this.context.x5;\n            console.log(hexdump(this.context.x5))\n        },\n        onLeave: function (args) {\n            var dex_file = this.dex_file;\n        }\n    })\n\n}\n<\/code><\/pre>\n
\"file\"<\/div><\/p>\n
\u9605\u8bfb\u8fd9\u91cc\u6211\u4eec\u53d1\u73b0\uff0c\u524d\u97628\u4e2abytes\u597d\u50cf\u5e76\u4e0d\u662fdex\u7684\u57fa\u5730\u5740\uff0c\u5e94\u4e3a\u7b2c2\u7ec48bytes \u663e\u7136\u662f\u4e00\u4e2a\u5730\u5740\uff0c\u800c\u4e0d\u662fsize\uff0c\u800c\u7b2c\u4e09\u7ec48bytes\u624d\u662fsize\u7684\u6837\u5b50\uff0c\u8fd9\u662f\u4e3a\u4f55\u5462\u3002\u5176\u5b9e\u662f\u5e94\u4e3aC++\u7684\u8c03\u7528\u7ea6\u5b9a\u91cc\u9762\u7b2c\u4e00\u4e2a\u53c2\u6570\u5b9e\u9645\u4e0a\u662fthis\u6307\u9488\uff0c\u6211\u4eec\u5982\u679c\u8981\u89e3\u6790\u7684\u8bdd\u662f\u9700\u8981\u8df3\u8fc7\u8fd9\u4e2a\u6307\u9488\u7684\uff0c\u63a5\u4e0b\u6765\u6211\u4eec\u518d\u770b\u8fd9\u4e00\u6bb5\u5185\u5b58\u5c31\u53ef\u4ee5\u548c\u4e4b\u524dDexfile\u5bf9\u5e94\u7684\u53c2\u6570\u547c\u5e94\u4e86\u3002
\n\u83b7\u53d6Dexfile\u57fa\u5730\u5740\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
function analysisDex(Base) {\n    var originalDefineClass = Base.add("0x4DB44");\n    console.log("originalDefineClassAddr->", originalDefineClass)\n    Interceptor.attach(originalDefineClass, {\n        onEnter: function (args) {\n            this.dex_file = this.context.x5;\n            var base = ptr(this.dex_file).add(Process.pointerSize).readPointer();\n            var size = ptr(this.dex_file).add(Process.pointerSize + Process.pointerSize).readUInt();\n            console.log("[DexFile]-> Base = ", base);\n            console.log("[DexFile]-> size = ", size);\n        },\n        onLeave: function (args) {\n        }\n    })\n\n}<\/code><\/pre>\n
\"file\"<\/div><\/p>\n
\u4e3a\u4e86\u786e\u4fdd\u6211\u4eec\u8bfb\u53d6\u7684\u662f\u5426\u6b63\u786e\uff0c\u6211\u4eec\u53ef\u4ee5\u8bfb\u53d6base\u7684\u524d8\u4e2a\u5b57\u8282\u6765\u770b\u4e00\u4e0bmagic\uff1a<\/p>\n
console.log("[DexFile]-> magic = ", magic);<\/code><\/pre>\n
\"file\"<\/div><\/p>\n
\u6ee1\u8db3\u6211\u4eecDexFile\u7684\u683c\u5f0f\uff0c\u90a3\u4e48\u806a\u660e\u7684\u4f60\u80af\u5b9a\u53d1\u73b0\u4e86\uff0c\u8fd9\u540c\u4e00\u4e2aBase\u600e\u4e48\u8c03\u7528\u8fd9\u4e48\u591a\u6b21\u554a\uff0c\u5e94\u4e3a\u62bd\u53d6\u58f3\u5e76\u4e0d\u662f\u4e00\u6b21\u6027\u586b\u5145\u597d\u7684\uff0c\u4ed6\u662f\u8c03\u7528\u7684\u65f6\u5019\u52a8\u6001\u56de\u586binsns\u7684\uff0c\u6240\u4ee5\u4f1a\u591a\u6b21\u7684\u64cd\u4f5c\u4e00\u4e2adex\u6587\u4ef6\u3002
\n\u5e76\u4e14\u5728hook\u7684\u903b\u8f91\u4e2d\u6211\u4eec\u53ef\u4ee5\u53d1\u73b0\uff0cdpt-shell\u5e76\u6ca1\u6709\u628a\u5df2\u7ecf\u88c5\u8f7d\u597d\u7684method\u5378\u8f7d\uff0c\u5176\u5b9e\u4e5f\u5f88\u5c11\u4f1a\u6709\u5382\u5546\u8fd9\u6837\u505a\uff0c\u4f1a\u5bfc\u81f4\u8fc7\u591a\u7684\u6027\u80fd\u635f\u5931\u3002<\/p>\n
\u90a3\u4e48\u6211\u4eec\u53ea\u8981\u7528\u4e00\u4e2amaps\u521b\u5efa\u6620\u5c04\uff0c\u5b58\u5165\u6240\u6709\u4e0d\u540c\u7684Dex\u7684base\u548csize\uff0c\u5728\u6211\u4eec\u7a0b\u5e8f\u52a0\u8f7d\u5b8c\u4e86\u4e4b\u540e\uff0c\u6211\u4eec\u904d\u5386\u8fd9\u4e2amaps\u8fdb\u884cdump\u4e0d\u5c31\u597d\u4e86\u561b\uff1f<\/p>\n
\u5177\u4f53\u5b9e\u73b0\u5982\u4e0b\uff1a<\/p>\n
const dexMap = new Map();\n\nfunction analysisDex(Base) {\n    var originalDefineClass = Base.add("0x4DB44");\n    console.log("originalDefineClassAddr->", originalDefineClass)\n    Interceptor.attach(originalDefineClass, {\n        onEnter: function (args) {\n            this.dex_file = this.context.x5;\n            var base = ptr(this.dex_file).add(Process.pointerSize).readPointer();\n            var size = ptr(this.dex_file).add(Process.pointerSize + Process.pointerSize).readUInt();\n            console.log("[DexFile]-> Base = ", base);\n            console.log("[DexFile]-> size = ", size);\n            var magic = ptr(base).readCString();\n            console.log("[DexFile]-> magic = ", magic);\n            \/\/ \u68c0\u67e5 base \u548c size \u662f\u5426\u5df2\u5b58\u5728\n            let isDuplicate = false;\n            for (let [existingBase, existingSize] of dexMap.entries()) {\n                if (existingBase.equals(base) && existingSize === size) {\n                    isDuplicate = true;\n                    break;\n                }\n            }\n\n            if (isDuplicate) {\n                console.log(`[WARN] DexFile with base ${base} and size ${size} already exists, skipping...`);\n            } else {\n                dexMap.set(base, size);\n                console.log(`[INFO] New DexFile found: base=${base}, size=${size}`);\n            }\n        },\n        onLeave: function (args) {\n        }\n    })\n\n}\n\nfunction printDexMap() {\n    console.log("Current DexFile Map:");\n    for (let [base, size] of dexMap.entries()) {\n        console.log(`Base: ${base}, Size: ${size}`);\n    }\n}\n<\/code><\/pre>\n
\u5f53\u6211\u4eecfrida\u8f93\u51fa\u53d8\u5f97\u7f13\u6162\u7684\u65f6\u5019\uff0c\u6216\u8005\u4e0d\u518d\u8f93\u51fa\u7684\u65f6\u5019\u6211\u4eec\u8c03\u7528\u4e00\u4e0bprintDexMap():<\/p>\n
\"file\"<\/div><\/p>\n
\u8fd9\u6837\u6211\u4eec\u5c31\u83b7\u5f97\u4e86\u6240\u6709\u52a0\u8f7d\u7684dex\u7684base\u4e0esize\uff0c\u7136\u540e\u5199\u4e00\u4e2a\u904d\u5386\u811a\u672c\u8fdb\u884cdump\u5c31\u884c\u4e86\uff1a<\/p>\n
\u8fd9\u91cc\u6211\u5df2\u7ecf\u5199\u597d\u4e86\u4e00\u4e2a\u76f4\u63a5dump\u5230\u79c1\u6709\u76ee\u5f55\u7684\uff1a<\/p>\n
function get_self_process_name() {\n    var openPtr = Module.getExportByName('libc.so', 'open');\n    var open = new NativeFunction(openPtr, 'int', ['pointer', 'int']);\n    var readPtr = Module.getExportByName("libc.so", "read");\n    var read = new NativeFunction(readPtr, "int", ["int", "pointer", "int"]);\n    var closePtr = Module.getExportByName('libc.so', 'close');\n    var close = new NativeFunction(closePtr, 'int', ['int']);\n    var path = Memory.allocUtf8String("\/proc\/self\/cmdline");\n    var fd = open(path, 0);\n\n    if (fd != -1) {\n        var buffer = Memory.alloc(0x1000);\n        var result = read(fd, buffer, 0x1000);\n        close(fd);\n        result = ptr(buffer).readCString();\n        return result\n    }\n\n    return "-1"\n}\n\nfunction Mkdir(path) {\n    if (path.indexOf("com") == -1) {\n        console.log("[Mkdir]-> Pass:", path);\n        return 0;\n    }\n    var mkdirPtr = Module.getExportByName('libc.so', 'mkdir');\n    var mkdir = new NativeFunction(mkdirPtr, 'int', ['pointer', 'int']);\n    var opendirPtr = Module.getExportByName('libc.so', 'opendir');\n    var opendir = new NativeFunction(opendirPtr, 'pointer', ['pointer']);\n    var closedirPtr = Module.getExportByName('libc.so', 'closedir');\n    var closedir = new NativeFunction(closedirPtr, 'int', ['pointer']);\n    var cPath = Memory.allocUtf8String(path);\n    var dir = opendir(cPath);\n\n    if (dir != 0) {\n        closedir(dir);\n        return 0\n    }\n\n    mkdir(cPath, 0o755);\n    chmod(path)\n    console.log("[Mkdir]->", path);\n}\n\nfunction chmod(path) {\n    var chmodPtr = Module.getExportByName('libc.so', 'chmod');\n    var chmod = new NativeFunction(chmodPtr, 'int', ['pointer', 'int']);\n    var cPath = Memory.allocUtf8String(path);\n    chmod(cPath, 755)\n}\n\nfunction dumpDex() {\n\n    dexMap.forEach((size, base) => {\n        console.log(`Base: ${base}, Size: ${size}`);\n        var magic = ptr(base).readCString();\n        console.log("DesFileMagic->", magic);\n        if (magic.indexOf("dex") == 0) {\n            var process_name = get_self_process_name();\n            if (process_name != "-1") {\n                var dex_dir_path = "\/data\/data\/" + process_name + "\/files"\n                Mkdir(dex_dir_path)\n                dex_dir_path += "\/dump_dex_" + process_name\n                Mkdir(dex_dir_path)\n                var dex_path = dex_dir_path + "\/class" + (dex_count == 1 ? "" : dex_count) + ".dex"; console.log("[find dex]:", dex_path); var fd = new File(dex_path, "wb");\n                if (fd && fd != null) {\n                    dex_count++; var dex_buffer = ptr(base).readByteArray(size);\n                    fd.write(dex_buffer); fd.flush();\n                    fd.close(); console.log("[dump dex]:", dex_path)\n                }\n            }\n        }\n    });\n}<\/code><\/pre>\n
\u7b49\u5f85\u7a0b\u5e8f\u52a0\u8f7d\u597d\u540e\u6211\u4eec\u76f4\u63a5\u8c03\u7528DumpDex\u5373\u53ef\uff1a<\/p>\n
\"file\"<\/div><\/p>\n
\u79c1\u6709\u76ee\u5f55\u4e2d\u5373\u53ef\u627e\u5230\u8fd9\u4e2afile<\/p>\n
\"file\"<\/div><\/p>\n
\u53cd\u7f16\u8bd1\u5373\u53ef\u53d1\u73b0\u88ab\u62bd\u53d6\u7684\u7c7b\u90fd\u586b\u5145\u597d\u4e86\uff1a<\/p>\n
\"file\"<\/div><\/p>\n
\u539f\u7406\u5206\u6790<\/h2>\n
\u8fd9\u91cc\u4e3b\u8981\u5206\u6790\u4e00\u4e0b\u7a0b\u5e8f\u5982\u4f55\u5904\u7406\u88ab\u62bd\u53d6\u7684\u7c7b\u586b\u5145\u56deClass\uff0c\u5bf9\u7167\u6e90\u7801\u8fdb\u884c\u5206\u6790\u3002\u53e6\u5916\u7684\u6b65\u9aa4\u5728\u4e0a\u6587\u7684\u9006\u5411\u8fc7\u7a0b\u8bf4\u4ee5\u53ca\u89e3\u91ca\u7684\u5dee\u4e0d\u591a\u4e86<\/p>\n
\u6e90\u7801\u53ef\u4ee5\u770b\u5230\u6b64\u5904\u662fDobbyHook<\/p>\n
\"file\"<\/div><\/p>\n
\u6821\u9a8c\u4e86SDK\u7248\u672c\uff0c\u4e0d\u540cSDK\u7248\u672c\u4e0d\u540c\u5904\u7406\u65b9\u5f0f<\/p>\n
\"file\"<\/div><\/p>\n
\u8fd9\u91cc\u76f4\u63a5\u5c31\u8d70patchClass\u4e86\uff0c\u90a3\u4e48\u6211\u4eec\u91cd\u70b9\u8981\u5206\u6790\u7684\u5c31\u662fpatchClass\u7684\u903b\u8f91\u4e86<\/p>\n
\"file\"<\/div><\/p>\n
\u8fd9\u91cc\u5c31\u662f\u5728\u6839\u636e\u4e0d\u540c\u7684SDK\u7248\u672c\u6765\u89e3\u6790 DexFile<\/p>\n
uint64_t static_fields_size = 0;\nread += DexFileUtils::readUleb128(class_data, &static_fields_size);\n\nuint64_t instance_fields_size = 0;\nread += DexFileUtils::readUleb128(class_data + read, &instance_fields_size);\n\nuint64_t direct_methods_size = 0;\nread += DexFileUtils::readUleb128(class_data + read, &direct_methods_size);\n\nuint64_t virtual_methods_size = 0;\nread += DexFileUtils::readUleb128(class_data + read, &virtual_methods_size);<\/code><\/pre>\n
\u83b7\u53d6\u7c7b\u4e2d\u5b57\u6bb5\u548c\u65b9\u6cd5\u7684\u6570\u91cf\uff0c\u4e3a\u540e\u7eed\u89e3\u6790\u505a\u51c6\u5907<\/p>\n
dex::ClassDataField staticFields[static_fields_size];\nread += DexFileUtils::readFields(class_data + read, staticFields, static_fields_size);\n\ndex::ClassDataField instanceFields[instance_fields_size];\nread += DexFileUtils::readFields(class_data + read, instanceFields, instance_fields_size);\n\ndex::ClassDataMethod directMethods[direct_methods_size];\nread += DexFileUtils::readMethods(class_data + read, directMethods, direct_methods_size);\n\ndex::ClassDataMethod virtualMethods[virtual_methods_size];\nread += DexFileUtils::readMethods(class_data + read, virtualMethods, virtual_methods_size);<\/code><\/pre>\n
\u83b7\u53d6\u7c7b\u4e2d\u6240\u6709\u5b57\u6bb5\u548c\u65b9\u6cd5\u7684\u8be6\u7ec6\u4fe1\u606f\uff0c\u4e3a\u540e\u7eed\u4fee\u8865\u505a\u51c6\u5907<\/p>\n
\"file\"<\/div><\/p>\n
\u8fd9\u91cc\u5c31\u5c06\u4e4b\u524d\u8bfb\u53d6\u5230\u7684\u6240\u6709\u7684\u65b9\u6cd5\u90fd\u4f20\u5165patchMethod\u4e2d\u6765\u4fee\u6539\u3002<\/p>\n
\"file\"<\/div><\/p>\n
\u7136\u540e\u5c31\u662fpatchMethod\u4e86\uff0c\u8fd9\u91cc\u4e3b\u8981\u662f\u5229\u7528\u4e86\u4e4b\u524d\u7ef4\u62a4\u597d\u7684dexMap\uff0c\u4fee\u6539\u5bf9\u5e94\u5185\u5b58\u6bb5\u6743\u9650\u540e\u5728Map\u67e5\u627eCodeItem\uff0c\u7136\u540e\u4f7f\u7528memcopy\u586b\u5165\u3002<\/p>\n
\u8fd9\u6837\u7684\u6d41\u7a0b\u5c31\u5b8c\u6210\u4e86\u7c7b\u7684\u52a8\u6001\u56de\u586b\u3002<\/p>\n
\u603b\u7ed3<\/h2>\n
dpt-shell\u4e0a\u6709\u5f88\u591a\u503c\u5f97\u5b66\u4e60\u7684\u6280\u672f\u548c\u52a0\u56fa\u539f\u7406\uff0c\u4e00\u6b21\u975e\u5e38\u5145\u5b9e\u7684\u5b66\u4e60\u8fc7\u7a0b<\/p>\n","protected":false},"excerpt":{"rendered":"
\u524d\u8a00 \u6700\u8fd1\u60f3\u8981\u91cd\u70b9\u5b66\u4e60\u4e00\u4e0b\u7c7b\u62bd\u53d6\u8fd9\u79cd\u7c7b\u578b\u7684\u52a0\u56fa\u662f\u5982\u4f55\u5b9e\u73b0\u7684\uff0c\u6545\u5728\u7f51\u4e0a\u641c\u5bfb\u3002\u6700\u7ec8\u770b\u5230\u4e86luoyesiqiu\u5927\u4f6c\u7684 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[13],"tags":[],"class_list":["post-1352","post","type-post","status-publish","format-standard","hentry","category-android"],"_links":{"self":[{"href":"https:\/\/blog.shangwendada.top\/index.php\/wp-json\/wp\/v2\/posts\/1352","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.shangwendada.top\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.shangwendada.top\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.shangwendada.top\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.shangwendada.top\/index.php\/wp-json\/wp\/v2\/comments?post=1352"}],"version-history":[{"count":32,"href":"https:\/\/blog.shangwendada.top\/index.php\/wp-json\/wp\/v2\/posts\/1352\/revisions"}],"predecessor-version":[{"id":1445,"href":"https:\/\/blog.shangwendada.top\/index.php\/wp-json\/wp\/v2\/posts\/1352\/revisions\/1445"}],"wp:attachment":[{"href":"https:\/\/blog.shangwendada.top\/index.php\/wp-json\/wp\/v2\/media?parent=1352"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.shangwendada.top\/index.php\/wp-json\/wp\/v2\/categories?post=1352"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.shangwendada.top\/index.php\/wp-json\/wp\/v2\/tags?post=1352"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}