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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

检测函数直接会检测这些ip和端口等：

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：

var _imports = Process.findModuleByName("XXX").enumerateImports();
var _CFNetworkCopySystemProxySettings = null;
for (var i = 0; i < _imports.length; i++) {//查找CFNetworkCopySystemProxySettings系统代理函数if (_imports[i].name.indexOf("CFNetworkCopySystemProxySettings") !== -1) {console.log(_imports[i].name, _imports[i].address);_CFNetworkCopySystemProxySettings = _imports[i].address;}
}if (_CFNetworkCopySystemProxySettings) {Interceptor.attach(_CFNetworkCopySystemProxySettings, {onEnter: function (agrgs) {}, onLeave: function (retval) {console.log("retval: ", ObjC.Object(retval));//将返回值全部nopretval.replace(0);}})
}

NSURL URLWithString:

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

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

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) {}});