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我正在为同事准备一个 Frida 测试平台,但我不熟悉 JavaScript 和 Node.JS。我想创建一个单独的 JS 文件来导入其他几个 JS 文件,每个文件都有几个功能。但是当我对一些导入其他函数的 Node.JS 代码使用 frida-compile 时,REPL 解释器不会将函数/变量拉入范围。因此,例如:

我有一个包含 3 个 JavaScript 文件的平面目录:

in1.js:

'use strict';
var a = 'test';
function b() { console.log("function b"); };

in2.js:

'use strict';
var c = 'test2';
var d = function () { console.log("function d"); };

in3.js:

'use strict';
require('./in1.js');
require('./in2.js');

然后我在 Windows 10 + Python 3.6 + Node.JS 9.5 上运行 frida-compile:

frida-compile in3.js -o out.js

这导致以下输出:

(function(){function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s}return e})()({1:[function(require,module,exports){
'use strict';

var a = 'test';
function b() {
  console.log("function b");
};

},{}],2:[function(require,module,exports){
'use strict';

var c = 'test2';
var d = function () {
  console.log("function d");
};

},{}],3:[function(require,module,exports){
'use strict';

require('./in1.js');
require('./in2.js');

},{"./in1.js":1,"./in2.js":2}]},{},[3])
//# sourceMappingURL=data:application/json;charset=utf-8;base64,eyJ2ZXJzaW9uIjozLCJzb3VyY2VzIjpbIi4uLy4uLy4uL25vZGVfbW9kdWxlcy9icm93c2VyLXBhY2svX3ByZWx1ZGUuanMiLCJpbjEuanMiLCJpbjIuanMiLCJpbjMuanMiXSwibmFtZXMiOltdLCJtYXBwaW5ncyI6IkFBQUE7QUNBQTs7QUFDQSxJQUFJLElBQUksTUFBUjtBQUNBLElBQUksSUFBSSxZQUFZO0FBQUUsVUFBUSxHQUFSLENBQVksWUFBWjtBQUE0QixDQUFsRDs7O0FDRkE7O0FBQ0EsSUFBSSxJQUFJLE9BQVI7QUFDQSxJQUFJLElBQUksWUFBWTtBQUFFLFVBQVEsR0FBUixDQUFZLFlBQVo7QUFBNEIsQ0FBbEQ7OztBQ0ZBOztBQUNBLFFBQVEsVUFBUjtBQUNBLFFBQVEsVUFBUiIsImZpbGUiOiJnZW5lcmF0ZWQuanMiLCJzb3VyY2VSb290IjoiIn0=

最后,当我尝试将其导入 Frida CLI 时,以 OWASP iGoat 项目为例,我无法访问这些函数中的任何一个:

    frida -R -f com.swaroop.iGoat -l out.js
     ____
    / _  |   Frida 10.6.52 - 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 `com.swaroop.iGoat`. Use %resume to let the main thread start executing!
[Remote::com.swaroop.iGoat]-> %resume
[Remote::com.swaroop.iGoat]-> a
ReferenceError: identifier 'a' undefined
[Remote::com.swaroop.iGoat]-> b
ReferenceError: identifier 'b' undefined
[Remote::com.swaroop.iGoat]-> c
ReferenceError: identifier 'c' undefined
[Remote::com.swaroop.iGoat]-> d
ReferenceError: identifier 'd' undefined
[Remote::com.swaroop.iGoat]-> module
ReferenceError: identifier 'module' undefined
[Remote::com.swaroop.iGoat]-> require
ReferenceError: identifier 'require' undefined
[Remote::com.swaroop.iGoat]-> exports
ReferenceError: identifier 'exports' undefined
[Remote::com.swaroop.iGoat]->

我错过了什么...如何在 Frida CLI 中访问 a、b、c 和 d?

4

1 回答 1

5

我认为您不能直接从脚本访问任何变量。

读取 Frida 源代码(特别是来自 frida-gum 存储库的 bindings/gumjs/runtime/core.js),他们将属性添加到变量global中,这似乎表现为全局对象(充当所有全局变量的存储的对象,就像window在浏览器中一样)用于在 REPL 中执行的 JS。

事实上,脚本中的这种代码:

global.test = "success";

在 REPL 中定义一个新变量:

[iPhone::Foo]-> test
"success"

(也感谢您向我介绍frida-compile,这让我现在的生活变得更轻松了。)

于 2018-02-13T15:52:27.653 回答