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# r0tracer | ||
安卓Java层多功能追踪脚本 | ||
# r0tracer | ||
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安卓Java层多功能追踪脚本 | ||
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> AKA:精简版 objection + Wallbreaker | ||
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# 功能: | ||
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- 根据黑白名单批量追踪类的所有方法 | ||
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hook("javax.crypto.Cipher", "$"); | ||
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![](pic\02.png) | ||
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- 在命中方法后打印出该类或对象的所有域值、参数、调用栈和返回值 | ||
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![](pic\03.png) | ||
![](pic\04.png) | ||
![](pic\05.png) | ||
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- 极简的文本保存日志机制、易于搜索关键参数 | ||
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- 针对加壳应用找不到类时可以切换Classloader | ||
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# 使用方法: | ||
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1. 修改`r0tracer.js`文件最底部处的代码,开启某一个Hook模式。 | ||
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![](pic\01.png) | ||
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2. 推荐使用Frida14版本,并且将日志使用`-o`参数进行输出保存 | ||
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``` | ||
$ frida -U -f com.r0ysue.example -l r0tracer.js --no-pause -o saveLog5.txt | ||
``` | ||
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> "-f"为Spawn模式,去掉"-f"为Attach模式 | ||
3. Frida版本=<12时,要加上`--runtime=v8`选项 | ||
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``` | ||
$ frida -U com.r0ysue.example -l r0tracer.js --runtime=v8 --no-pause -o saveLog6.txt | ||
``` | ||
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# 优势 | ||
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- 比`objection`增加延时`spawn` | ||
- 比`objection`增加批量`hook`类\方法\构造函数 | ||
- `Wallbreaker`在`frida14`上还是一直崩 | ||
- 比`Wallbreaker`增加`hook`看`instance`的`fields` | ||
- `inspectObject`函数可以单独拿出去使用 | ||
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注意点: | ||
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- Frida的崩溃有时候真的是玄学,大项目一崩溃根本不知道是哪里出的问题,这也是小而专的项目也有一丝机会的原因 | ||
- Frida自身即会经常崩溃,建议多更换Frida(客/服要配糖)版本/安卓版本,`ROOT`采用`Magisk Root` | ||
- 我自己常用的组合是两部手机,Frida12.8.0全家桶+[Google Factoty Image](https://developers.google.com/android/images) Android 8.1.0,和Frida14.2.2全家桶+[Google Factoty Image](https://developers.google.com/android/images) Android 10 | ||
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# 致谢 Thanks to | ||
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|项目|链接| | ||
|:-:|:-:| | ||
|objection|https://github.com/sensepost/objection| | ||
|Wallbreaker|https://github.com/hluwa/Wallbreaker| | ||
|hacking-frida|https://awakened1712.github.io/hacking/hacking-frida/| | ||
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function uniqBy(array, key) { | ||
var seen = {}; | ||
return array.filter(function (item) { | ||
var k = key(item); | ||
return seen.hasOwnProperty(k) ? false : (seen[k] = true); | ||
}); | ||
} | ||
function hasOwnProperty(obj, name) { | ||
try { | ||
return obj.hasOwnProperty(name) || name in obj; | ||
} catch (e) { | ||
return obj.hasOwnProperty(name); | ||
} | ||
} | ||
function getHandle(object) { | ||
if (hasOwnProperty(object, '$handle')) { | ||
if (object.$handle != undefined) { | ||
return object.$handle; | ||
} | ||
} | ||
if (hasOwnProperty(object, '$h')) { | ||
if (object.$h != undefined) { | ||
return object.$h; | ||
} | ||
} | ||
return null; | ||
} | ||
//查看域值 | ||
function inspectObject(obj, input) { | ||
var isInstance = false; | ||
var obj_class = null; | ||
if (getHandle(obj) === null) { | ||
obj_class = obj.class; | ||
} else { | ||
var Class = Java.use("java.lang.Class"); | ||
obj_class = Java.cast(obj.getClass(), Class); | ||
isInstance = true; | ||
} | ||
input = input.concat("Inspecting Fields: => ", isInstance, " => ", obj_class.toString()); | ||
input = input.concat("\r\n") | ||
var fields = obj_class.getDeclaredFields(); | ||
for (var i in fields) { | ||
if (isInstance || Boolean(fields[i].toString().indexOf("static ") >= 0)) { | ||
// output = output.concat("\t\t static static static " + fields[i].toString()); | ||
var className = obj_class.toString().trim().split(" ")[1]; | ||
// console.log("className is => ",className); | ||
var fieldName = fields[i].toString().split(className.concat(".")).pop(); | ||
var fieldType = fields[i].toString().split(" ").slice(-2)[0]; | ||
var fieldValue = undefined; | ||
if (!(obj[fieldName] === undefined)) | ||
fieldValue = obj[fieldName].value; | ||
input = input.concat(fieldType + " \t" + fieldName + " => ", fieldValue + " => ", JSON.stringify(fieldValue)); | ||
input = input.concat("\r\n") | ||
} | ||
} | ||
return input; | ||
} | ||
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// trace单个类的所有静态和实例方法包括构造方法 trace a specific Java Method | ||
function traceMethod(targetClassMethod) { | ||
var delim = targetClassMethod.lastIndexOf("."); | ||
if (delim === -1) return; | ||
var targetClass = targetClassMethod.slice(0, delim) | ||
var targetMethod = targetClassMethod.slice(delim + 1, targetClassMethod.length) | ||
var hook = Java.use(targetClass); | ||
var overloadCount = hook[targetMethod].overloads.length; | ||
console.log("Tracing Method : " + targetClassMethod + " [" + overloadCount + " overload(s)]"); | ||
for (var i = 0; i < overloadCount; i++) { | ||
hook[targetMethod].overloads[i].implementation = function () { | ||
//初始化输出 | ||
var output = ""; | ||
//画个横线 | ||
for (var p = 0; p < 100; p++) { | ||
output = output.concat("=="); | ||
} | ||
output = output.concat("\r\n") | ||
//域值 | ||
output = inspectObject(this, output); | ||
//进入函数 | ||
output = output.concat("\n*** entered " + targetClassMethod); | ||
output = output.concat("\r\n") | ||
if (arguments.length) console.log(); | ||
//参数 | ||
for (var j = 0; j < arguments.length; j++) { | ||
output = output.concat("arg[" + j + "]: " + arguments[j] + " => " + JSON.stringify(arguments[j])); | ||
output = output.concat("\r\n") | ||
} | ||
//调用栈 | ||
output = output.concat(Java.use("android.util.Log").getStackTraceString(Java.use("java.lang.Throwable").$new())); | ||
output = output.concat("\r\n") | ||
var retval = this[targetMethod].apply(this, arguments); | ||
//返回值 | ||
output = output.concat("\nretval: " + retval + " => " + JSON.stringify(retval)); | ||
output = output.concat("\r\n") | ||
// inspectObject(this) | ||
//离开函数 | ||
output = output.concat("\n*** exiting " + targetClassMethod); | ||
output = output.concat("\r\n") | ||
//最终输出 | ||
console.log(output); | ||
return retval; | ||
} | ||
} | ||
} | ||
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function traceClass(targetClass) { | ||
//Java.use是新建一个对象哈,大家还记得么? | ||
var hook = Java.use(targetClass); | ||
//利用反射的方式,拿到当前类的所有方法 | ||
var methods = hook.class.getDeclaredMethods(); | ||
//建完对象之后记得将对象释放掉哈 | ||
hook.$dispose; | ||
//将方法名保存到数组中 | ||
var parsedMethods = []; | ||
var output = ""; | ||
output = output.concat("\tSpec: => \r\n") | ||
methods.forEach(function (method) { | ||
output = output.concat(method.toString()) | ||
output = output.concat("\r\n") | ||
parsedMethods.push(method.toString().replace(targetClass + ".", "TOKEN").match(/\sTOKEN(.*)\(/)[1]); | ||
}); | ||
//去掉一些重复的值 | ||
var Targets = uniqBy(parsedMethods, JSON.stringify); | ||
// targets = []; | ||
var constructors = hook.class.getDeclaredConstructors(); | ||
if (constructors.length > 0) { | ||
constructors.forEach(function (constructor) { | ||
output = output.concat("Tracing ", constructor.toString()) | ||
output = output.concat("\r\n") | ||
}) | ||
Targets = Targets.concat("$init") | ||
} | ||
//对数组中所有的方法进行hook, | ||
Targets.forEach(function (targetMethod) { | ||
traceMethod(targetClass + "." + targetMethod); | ||
}); | ||
//画个横线 | ||
for (var p = 0; p < 100; p++) { | ||
output = output.concat("+"); | ||
} | ||
console.warn(output); | ||
} | ||
function hook(white, black, target = null) { | ||
console.log("start") | ||
if (!(target === null)) { | ||
console.warn("Begin enumerateClassLoaders ...") | ||
Java.enumerateClassLoaders({ | ||
onMatch: function (loader) { | ||
try { | ||
if (loader.findClass(target)) { | ||
console.log("Successfully found loader") | ||
console.log(loader); | ||
Java.classFactory.loader = loader; | ||
console.log("Switch Classloader Successfully ! ") | ||
} | ||
} | ||
catch (error) { | ||
console.log(" continuing :" + error) | ||
} | ||
}, | ||
onComplete: function () { | ||
console.log("EnumerateClassloader END") | ||
} | ||
}) | ||
} | ||
console.warn("Begin Search Class...") | ||
var targetClasses = new Array(); | ||
Java.enumerateLoadedClasses({ | ||
onMatch: function (className) { | ||
if (className.toString().indexOf(white) >= 0 && | ||
className.toString().indexOf(black) < 0 | ||
) { | ||
console.log("Found Class => ", className) | ||
targetClasses.push(className); | ||
traceClass(className); | ||
} | ||
}, onComplete: function () { | ||
console.log("Search Class Completed!") | ||
} | ||
}) | ||
var output = "On Total Tracing :"+String(targetClasses.length)+" classes :\r\n"; | ||
targetClasses.forEach(function(target){ | ||
output = output.concat(target); | ||
output = output.concat("\r\n") | ||
}) | ||
console.warn(output+"Start Tracing ...") | ||
} | ||
function main() { | ||
Java.perform(function () { | ||
console.warn("r0tracer begin ... !") | ||
/* | ||
//以下三种模式,取消注释某一行以开启 | ||
*/ | ||
//A. 简易trace单个函数 | ||
// traceClass("javax.crypto.Cipher") | ||
//B. 黑白名单trace多个函数,第一个参数是白名单(包含关键字),第二个参数是黑名单(不包含的关键字) | ||
hook("javax.crypto.Cipher", "$"); | ||
//C. 报某个类找不到时,将某个类名填写到第三个参数,比如找不到com.roysue.check类。(前两个参数依旧是黑白名单) | ||
// hook("com.roysue.check"," ","com.roysue.check"); | ||
}) | ||
} | ||
/* | ||
//setImmediate是立即执行函数,setTimeout是等待毫秒后延迟执行函数 | ||
//二者在attach模式下没有区别 | ||
//在spawn模式下,hook系统API时如javax.crypto.Cipher建议使用setImmediate立即执行,不需要延时 | ||
//在spawn模式下,hook应用自己的函数或含壳时,建议使用setImmediate并给出适当的延时(500~5000) | ||
*/ | ||
setImmediate(main) | ||
// | ||
// setTimeout(main, 2000); | ||
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// 玄而又玄,众妙之门 | ||
// Frida的崩溃有时候真的是玄学,大项目一崩溃根本不知道是哪里出的问题,这也是小而专的项目也有一丝机会的原因 | ||
// Frida自身即会经常崩溃,建议多更换Frida(客/服要配糖)版本/安卓版本,我自己常用的组合是两部手机,Frida12.8.0全家桶+安卓8.1.0,和Frida14.2.2全家桶+安卓10 |
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