frida注入hook脚本脱壳
脚本地址:https://github.com/r0ysue/frida_dump
使用dump_so
frida -U packagename -l dump_so.js
____
/ _ | Frida 12.4.8 - A world-class dynamic instrumentation toolkit
| (_| |
> _ | Commands:
/_/ |_| help -> Displays the help system
. . . . object? -> Display information about 'object'
. . . . exit/quit -> Exit
. . . .
. . . . More info at http://www.frida.re/docs/home/
[LGE AOSP on HammerHead::packagename]-> dump_so("name.so")
[name]: name.so
[base]: 0x99adf000
[size]: 0x2d4000
[path]: /data/app/packagename-2/lib/arm/name.so
[dump]: /data/user/0/packagename/files/name.so_0x99adf000_0x2d4000.so
undefined
[LGE AOSP on HammerHead::packagename]->
使用dump_dex
frida -U --no-pause -f packagename -l dump_dex.js
/ _ | Frida 12.4.8 - A world-class dynamic instrumentation toolkit
| (_| |
> _ | Commands:
/_/ |_| help -> Displays the help system
. . . . object? -> Display information about 'object'
. . . . exit/quit -> Exit
. . . .
. . . . More info at http://www.frida.re/docs/home/
Spawned `packagename`. Resuming main thread!
[Google Pixel XL::packagename]-> [dlopen:] libart.so
_ZN3art11ClassLinker11DefineClassEPNS_6ThreadEPKcmNS_6HandleINS_6mirror11ClassLoaderEEERKNS_7DexFileERKNS9_8ClassDefE 0x7ac6dc4f74
[DefineClass:] 0x7ac6dc4f74
[dump dex]: /data/data/packagename/files/7aab800000_8341c4.dex
文件位置
dump 后的文件一般在手机里面
脚本代码
dump_dex.js
function get_self_process_name() {
var openPtr = Module.getExportByName('libc.so', 'open');
var open = new NativeFunction(openPtr, 'int', ['pointer', 'int']);
var readPtr = Module.getExportByName("libc.so", "read");
var read = new NativeFunction(readPtr, "int", ["int", "pointer", "int"]);
var closePtr = Module.getExportByName('libc.so', 'close');
var close = new NativeFunction(closePtr, 'int', ['int']);
var path = Memory.allocUtf8String("/proc/self/cmdline");
var fd = open(path, 0);
if (fd != -1) {
var buffer = Memory.alloc(0x1000);
var result = read(fd, buffer, 0x1000);
close(fd);
result = ptr(buffer).readCString();
return result;
}
return "-1";
}
function dump_dex() {
var libart = Process.findModuleByName("libart.so");
var addr_DefineClass = null;
var symbols = libart.enumerateSymbols();
for (var index = 0; index < symbols.length; index++) {
var symbol = symbols[index];
var symbol_name = symbol.name;
//这个DefineClass的函数签名是Android9的
//_ZN3art11ClassLinker11DefineClassEPNS_6ThreadEPKcmNS_6HandleINS_6mirror11ClassLoaderEEERKNS_7DexFileERKNS9_8ClassDefE
if (symbol_name.indexOf("ClassLinker") >= 0 &&
symbol_name.indexOf("DefineClass") >= 0 &&
symbol_name.indexOf("Thread") >= 0 &&
symbol_name.indexOf("DexFile") >= 0 ) {
console.log(symbol_name, symbol.address);
addr_DefineClass = symbol.address;
}
}
var dex_maps = {};
console.log("[DefineClass:]", addr_DefineClass);
if (addr_DefineClass) {
Interceptor.attach(addr_DefineClass, {
onEnter: function (args) {
var dex_file = args[5];
//ptr(dex_file).add(Process.pointerSize) is "const uint8_t* const begin_;"
//ptr(dex_file).add(Process.pointerSize + Process.pointerSize) is "const size_t size_;"
var base = ptr(dex_file).add(Process.pointerSize).readPointer();
var size = ptr(dex_file).add(Process.pointerSize + Process.pointerSize).readUInt();
if (dex_maps[base] == undefined) {
dex_maps[base] = size;
var magic = ptr(base).readCString();
if (magic.indexOf("dex") == 0) {
var process_name = get_self_process_name();
if (process_name != "-1") {
var dex_path = "/data/data/" + process_name + "/files/" + base.toString(16) + "_" + size.toString(16) + ".dex";
console.log("[find dex]:", dex_path);
var fd = new File(dex_path, "wb");
if (fd && fd != null) {
var dex_buffer = ptr(base).readByteArray(size);
fd.write(dex_buffer);
fd.flush();
fd.close();
console.log("[dump dex]:", dex_path);
}
}
}
}
}, onLeave: function (retval) {
}
});
}
}
var is_hook_libart = false;
function hook_dlopen() {
Interceptor.attach(Module.findExportByName(null, "dlopen"), {
onEnter: function (args) {
var pathptr = args[0];
if (pathptr !== undefined && pathptr != null) {
var path = ptr(pathptr).readCString();
//console.log("dlopen:", path);
if (path.indexOf("libart.so") >= 0) {
this.can_hook_libart = true;
console.log("[dlopen:]", path);
}
}
},
onLeave: function (retval) {
if (this.can_hook_libart && !is_hook_libart) {
dump_dex();
is_hook_libart = true;
}
}
})
Interceptor.attach(Module.findExportByName(null, "android_dlopen_ext"), {
onEnter: function (args) {
var pathptr = args[0];
if (pathptr !== undefined && pathptr != null) {
var path = ptr(pathptr).readCString();
//console.log("android_dlopen_ext:", path);
if (path.indexOf("libart.so") >= 0) {
this.can_hook_libart = true;
console.log("[android_dlopen_ext:]", path);
}
}
},
onLeave: function (retval) {
if (this.can_hook_libart && !is_hook_libart) {
dump_dex();
is_hook_libart = true;
}
}
});
}
setImmediate(hook_dlopen);
dump_so.js
function dump_so(so_name) {
Java.perform(function () {
var currentApplication = Java.use("android.app.ActivityThread").currentApplication();
var dir = currentApplication.getApplicationContext().getFilesDir().getPath();
var libso = Process.getModuleByName(so_name);
console.log("[name]:", libso.name);
console.log("[base]:", libso.base);
console.log("[size]:", ptr(libso.size));
console.log("[path]:", libso.path);
var file_path = dir + "/" + libso.name + "_" + libso.base + "_" + ptr(libso.size) + ".so";
var file_handle = new File(file_path, "wb");
if (file_handle && file_handle != null) {
Memory.protect(ptr(libso.base), libso.size, 'rwx');
var libso_buffer = ptr(libso.base).readByteArray(libso.size);
file_handle.write(libso_buffer);
file_handle.flush();
file_handle.close();
console.log("[dump]:", file_path);
}
});
}
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