IOS - 抓包通杀篇

待我称王封你为后i 2023-09-26 18:06 49阅读 0赞

IOS中大多数情况，开发者都会使用OC提供的api函数，CFNetworkCopySystemProxySettings来进行代理检测；

### **CFNetworkCopySystemProxySettings** ###

![在这里插入图片描述][55161aa4119a40b9b7de1ec76b3c33bd.png]

![在这里插入图片描述][6213b2ec1198497386bf06d5a9d2973f.png]

检测函数直接会检测这些ip和端口等：  
![在这里插入图片描述][b19408e3e0d34983a6628f4e84198966.png]

采用直接附加页面进程：

> frida -UF -l 通杀代理抓包.js

上通杀脚本：

### NSURL URLWithString: ###

> frida-trace -U -f 包名 -m "+[NSURL URLWithString:]"

更改url得传入得参数，及堆栈打印，也叫url定位

/*
     * Auto-generated by Frida. Please modify to match the signature of +[NSURL URLWithString:].
     * This stub is currently auto-generated from manpages when available.
     *
     * For full API reference, see: https://frida.re/docs/javascript-api/
     */
    
    {
        
      /**
       * Called synchronously when about to call +[NSURL URLWithString:].
       *
       * @this {object} - Object allowing you to store state for use in onLeave.
       * @param {function} log - Call this function with a string to be presented to the user.
       * @param {array} args - Function arguments represented as an array of NativePointer objects.
       * For example use args[0].readUtf8String() if the first argument is a pointer to a C string encoded as UTF-8.
       * It is also possible to modify arguments by assigning a NativePointer object to an element of this array.
       * @param {object} state - Object allowing you to keep state across function calls.
       * Only one JavaScript function will execute at a time, so do not worry about race-conditions.
       * However, do not use this to store function arguments across onEnter/onLeave, but instead
       * use "this" which is an object for keeping state local to an invocation.
       */
      onEnter(log, args, state) {
        
    	console.log('CCCryptorCreate called from:\n' +
            Thread.backtrace(this.context, Backtracer.ACCURATE)
            .map(DebugSymbol.fromAddress).join('\n') + '\n');
    	log(`+[NSURL URLWithString:]` + ObjC.Object(args[2]));
      },
    
      /**
       * Called synchronously when about to return from +[NSURL URLWithString:].
       *
       * See onEnter for details.
       *
       * @this {object} - Object allowing you to access state stored in onEnter.
       * @param {function} log - Call this function with a string to be presented to the user.
       * @param {NativePointer} retval - Return value represented as a NativePointer object.
       * @param {object} state - Object allowing you to keep state across function calls.
       */
      onLeave(log, retval, state) {
        
      }
    }

### 双向证书： ###

资源路径操作，可以入手关键函数；

> frida-trace  -UF  -m "-[NSBundle pathForResource*]"

/*
     * Auto-generated by Frida. Please modify to match the signature of -[NSBundle pathForResource:ofType:].
     * This stub is currently auto-generated from manpages when available.
     *
     * For full API reference, see: https://frida.re/docs/javascript-api/
     */
    
    {
        
      /**
       * Called synchronously when about to call -[NSBundle pathForResource:ofType:].
       *
       * @this {object} - Object allowing you to store state for use in onLeave.
       * @param {function} log - Call this function with a string to be presented to the user.
       * @param {array} args - Function arguments represented as an array of NativePointer objects.
       * For example use args[0].readUtf8String() if the first argument is a pointer to a C string encoded as UTF-8.
       * It is also possible to modify arguments by assigning a NativePointer object to an element of this array.
       * @param {object} state - Object allowing you to keep state across function calls.
       * Only one JavaScript function will execute at a time, so do not worry about race-conditions.
       * However, do not use this to store function arguments across onEnter/onLeave, but instead
       * use "this" which is an object for keeping state local to an invocation.
       */
      onEnter(log, args, state) {
        
    	console.log('NSBundle pathForResource called from:\n' +
            Thread.backtrace(this.context, Backtracer.ACCURATE)
            .map(DebugSymbol.fromAddress).join('\n') + '\n');
        log(`-[NSBundle pathForResource:${
          ObjC.Object(args[2])} ofType:${
          ObjC.Object(args[3])}]`);
      },
    
      /**
       * Called synchronously when about to return from -[NSBundle pathForResource:ofType:].
       *
       * See onEnter for details.
       *
       * @this {object} - Object allowing you to access state stored in onEnter.
       * @param {function} log - Call this function with a string to be presented to the user.
       * @param {NativePointer} retval - Return value represented as a NativePointer object.
       * @param {object} state - Object allowing you to keep state across function calls.
       */
      onLeave(log, retval, state) {
        
      }
    }

### HOOK抓包 ###

基于底层ssl库来实现：

//请求
    var ssl_write = Module.findExportByName("libboringssl.dylib", "SSL_write");
    console.log("ssl_write", ssl_write);   //ssl input len
    Interceptor.attach(ssl_write, {
        
        onEnter: function (args) {
        
            console.log("=================================================");
            console.log("CurrentThreadId: ", Process.getCurrentThreadId(), ", ssl_write onEnter args[1]: ", hexdump(args[1], {
        length: args[2].toInt32()}));
        }, onLeave: function (retval) {
        
    
        }
    });
    
    //返回响应
    var ssl_read = Module.findExportByName("libboringssl.dylib", "SSL_read");
    console.log("ssl_read", ssl_read);  //ssl output len
    Interceptor.attach(ssl_read, {
        
        onEnter: function (args) {
        
            this.args1 = args[1];
            this.args2 = args[2];
        }, onLeave: function (retval) {
        
            console.log("=================================================");
            console.log("CurrentThreadId: ", Process.getCurrentThreadId(), ", ssl_read onLeave args[1]: ",
                this.args1.readByteArray(this.args2.toInt32())
            );
        }
    });

### r0Capture 肉师傅的安卓应用层抓包通杀脚本 ###

这个在之前安卓也说过，ios和安卓都通用的；  
详见：[https://codeooo.blog.csdn.net/article/details/127123371][https_codeooo.blog.csdn.net_article_details_127123371]

function initializeGlobals() {
        
      var resolver = new ApiResolver("module");
      var exps = [
        [Process.platform == "darwin" ? "*libboringssl*" : "*libssl*", ["SSL_read", "SSL_write", "SSL_get_fd", "SSL_get_session", "SSL_SESSION_get_id"]], // for ios and Android
        [Process.platform == "darwin" ? "*libsystem*" : "*libc*", ["getpeername", "getsockname", "ntohs", "ntohl"]]
      ];

源码里三目运算符，也说明了，ios用 libboringssl 动态库 ， 安卓 libssl库；

同时还hook了，”SSL\_read", “SSL\_write” ,等等~

Interceptor.attach(addresses["SSL_read"],
      {
        
        onEnter: function (args) {
        
          var message = getPortsAndAddresses(SSL_get_fd(args[0]), true);
          message["ssl_session_id"] = getSslSessionId(args[0]);
          message["function"] = "SSL_read";
          message["stack"] = SSLstackread;
          this.message = message;
          this.buf = args[1];
        },
        onLeave: function (retval) {
        
          retval |= 0; // Cast retval to 32-bit integer.
          if (retval <= 0) {
        
            return;
          }
          send(this.message, Memory.readByteArray(this.buf, retval));
        }
      });
    
    Interceptor.attach(addresses["SSL_write"],
      {
        
        onEnter: function (args) {
        
          var message = getPortsAndAddresses(SSL_get_fd(args[0]), false);
          message["ssl_session_id"] = getSslSessionId(args[0]);
          message["function"] = "SSL_write";
          message["stack"] = SSLstackwrite;
          send(message, Memory.readByteArray(args[1], parseInt(args[2])));
        },
        onLeave: function (retval) {
        
        }
      });

[55161aa4119a40b9b7de1ec76b3c33bd.png]: https://img-blog.csdnimg.cn/55161aa4119a40b9b7de1ec76b3c33bd.png
[6213b2ec1198497386bf06d5a9d2973f.png]: https://img-blog.csdnimg.cn/6213b2ec1198497386bf06d5a9d2973f.png
[b19408e3e0d34983a6628f4e84198966.png]: https://img-blog.csdnimg.cn/b19408e3e0d34983a6628f4e84198966.png
[https_codeooo.blog.csdn.net_article_details_127123371]: https://codeooo.blog.csdn.net/article/details/127123371