From d4bd385ea3c823f705e68ae43f2d3651bd3a2e00 Mon Sep 17 00:00:00 2001 From: yincong Date: Tue, 30 Dec 2025 12:17:41 +0800 Subject: [PATCH] add frida http --- frida-gadget/readme.md | 3 + frida/frida.md | 2 +- frida/receive.js | 65 ++---- frida/script.js | 13 +- onebot/go.mod | 7 + onebot/go.sum | 4 + onebot/script.js | 515 +++++++++++++++++++++++++++++++++++++++++ 7 files changed, 550 insertions(+), 59 deletions(-) create mode 100644 onebot/go.mod create mode 100644 onebot/go.sum create mode 100644 onebot/script.js diff --git a/frida-gadget/readme.md b/frida-gadget/readme.md index 9829050..73d222b 100644 --- a/frida-gadget/readme.md +++ b/frida-gadget/readme.md @@ -9,6 +9,9 @@ xcodebuild # 将生成的二进制文件移动到系统路径，方便全局调用 cp build/Release/insert_dylib /usr/local/bin/ +wget https://github.com/frida/frida/releases/download/17.5.2/frida-gadget-17.5.2-macos-universal.dylib.xz +xz -d frida-gadget-17.5.2-macos-universal.dylib.xz +cp frida-gadget-17.5.2-macos-universal.dylib /Applications/WeChat.app/Contents/Frameworks//FridaGadget.dylib cd /Applications/WeChat.app/Contents/MacOS/ /usr/local/bin/insert_dylib --inplace --strip-codesig "@executable_path/../Frameworks/FridaGadget.dylib" WeChat ./sign.sh diff --git a/frida/frida.md b/frida/frida.md index 666c63b..64cec18 100644 --- a/frida/frida.md +++ b/frida/frida.md @@ -1,4 +1,4 @@ frida -f /Applications/WeChat.app/Contents/MacOS/WeChat -l script.js -frida-trace -p 62349 -i '*encrypt*' -i "*Encrypt*" -x '*objc_msgSend_noarg*' -x '*objc_msgSend_debug*' -x '*objc_msgSend*' -x "*_HIDisableSuddenTerminationForSendEvent*" -x "*_HIEnableSuddenTerminationForSendEvent*" -x "*SendEventToEventTarget*" -x "*s10RTCUtility10XPCMessageV4dictAA16RTCXPCDictionaryVvg*" -x "*MTLMessageContextEnd*" -x "*ictAA16RTCXPCDictionaryVvg*" -x "*_MTLMessageContextBegin_*" -x "*CFMachMessageCheckForAndDestroyUnsentMessag*" -x "*SLEventCopyAuthenticationMessage*" -x "*SendTextInputEvent_WithCompletionHandler*" -x '*mach_msg_send*' -x "*dispatch_mach_send_with_result_and_async_reply_4libxpc*" -x "*dispatch_mach_send_with_result_and_async_reply_4libxpc*" -x "*dispatch_mach_send_with_result*" --decorate --ui-port 60000 +frida-trace -p 57961 -i '*encrypt*' -i "*Encrypt*" -x '*objc_msgSend_noarg*' -x '*objc_msgSend_debug*' -x '*objc_msgSend*' -x "*_HIDisableSuddenTerminationForSendEvent*" -x "*_HIEnableSuddenTerminationForSendEvent*" -x "*SendEventToEventTarget*" -x "*s10RTCUtility10XPCMessageV4dictAA16RTCXPCDictionaryVvg*" -x "*MTLMessageContextEnd*" -x "*ictAA16RTCXPCDictionaryVvg*" -x "*_MTLMessageContextBegin_*" -x "*CFMachMessageCheckForAndDestroyUnsentMessag*" -x "*SLEventCopyAuthenticationMessage*" -x "*SendTextInputEvent_WithCompletionHandler*" -x '*mach_msg_send*' -x "*dispatch_mach_send_with_result_and_async_reply_4libxpc*" -x "*dispatch_mach_send_with_result_and_async_reply_4libxpc*" -x "*dispatch_mach_send_with_result*" --decorate --ui-port 60000 frida-trace -p 进程号 -i "*Message*" --decorate 比较好用 frida -p 79464 -l ./script.js \ No newline at end of file diff --git a/frida/receive.js b/frida/receive.js index 9f9b51c..da00f6f 100644 --- a/frida/receive.js +++ b/frida/receive.js @@ -26,18 +26,21 @@ function handlePr(addr, keyword) { counterMap.set(addr, currentCount + 1); console.log(`${addr} called ${currentCount} times`); - try { - if (this.context.x0.compare(ptr("0x100000000")) >= 0) { - console.log(`[!] X3 Register Value: ${this.context.x3}`); - dump(this.context.x0) - } + if (args[0].isNull()) { + console.log("args[0] is NULL, skipping hexdump."); + return; + } - if (this.context.x20.compare(ptr("0x100000000")) >= 0) { - console.log(`[!] X20 Register Value: ${this.context.x20}`); - dump(this.context.x20) - } + try { + console.log("[*] Hexdump of args[0]:"); + console.log(hexdump(args[0], { + offset: 0, + length: 256, + header: true, + ansi: true // 在支持彩色输出的终端（如 macOS 终端）中效果很好 + })); } catch (e) { - console.log("Enter Error:", e); + console.log("[!] 无法读取内存: " + e.message); } }, @@ -47,8 +50,7 @@ function handlePr(addr, keyword) { } - -const prs = ["102B66C30"] +const prs = ["10438958c", "10434ce6c", "10433c754"] const k = ""; for (let pr of prs) { handlePr(pr, k); @@ -66,42 +68,3 @@ function clearCount() { } -function dump(xValue) { - console.log(`X has a pointer: ${xValue}`); - - let buf = null; - - try { - const buf = xValue.readByteArray(512) - let s = ""; - const u8 = new Uint8Array(buf); - for (let b of u8) { - if (b >= 0x20 && b <= 0x7E) { - s += String.fromCharCode(b); - } else { - s += "."; - } - } - - console.log(s); - - } catch (e) { - console.warn(`[!] 首次读取失败，尝试修改权限... 错误: ${e.message}`); - - } - - // --- 内存读取成功，进行解码 --- - if (buf) { - let s = ""; - const u8 = new Uint8Array(buf); - // ... (您的解码逻辑) - for (let b of u8) { - if (b >= 0x20 && b <= 0x7E) { - s += String.fromCharCode(b); - } else { - s += "."; - } - } - console.log(`|| Read String: ${s} \n|| Raw Data: ${u8}`); - } -} \ No newline at end of file diff --git a/frida/script.js b/frida/script.js index 972c05a..b46c9aa 100644 --- a/frida/script.js +++ b/frida/script.js @@ -160,16 +160,16 @@ function setTriggerAttach() { setImmediate(setTriggerAttach); -function manualTrigger(taskId, receiver, content) { +function manualTrigger(taskId, receiver, content) { console.log("[*] Manual Trigger Started..."); if (globalMessagePtr.isNull()) { console.log("[!] globalMessagePtr is NULL, cannot trigger!"); - return; + return false; } if (!taskId || !receiver || !content) { console.log("[!] taskId or Receiver or Content is empty!"); - return; + return false; } // 获取当前时间戳 (秒) @@ -177,7 +177,7 @@ function manualTrigger(taskId, receiver, content) { // 全局变量不为空，并且上次发送时间小于1s，不给发送 if ((taskIdGlobal !== 0 || receiverGlobal !== "" || contentGlobal !== "") && lastSendTime + 1 > timestamp) { console.log("[!] taskId or receiver or content is not empty!"); - return; + return false; } lastSendTime = timestamp @@ -255,14 +255,13 @@ function manualTrigger(taskId, receiver, content) { try { const arg1 = globalMessagePtr; // 第一个指针参数 const arg2 = triggerX1Payload; // 第二个参数 0x175ED6600 - console.log(`[*] Calling trigger function at ${triggerFuncAddr} with args: (${arg1}, ${arg2})`); - const result = sub_10444A99C(arg1, arg2); - console.log("[+] Execution trigger function Success. Return value: " + result); + return true; } catch (e) { console.log("[!] Error trigger function during execution: " + e); + return false; } } diff --git a/onebot/go.mod b/onebot/go.mod new file mode 100644 index 0000000..fa47074 --- /dev/null +++ b/onebot/go.mod @@ -0,0 +1,7 @@ +module github.com/yincongcyincong/weixin-macos/onebot + +go 1.25.0 + +require github.com/frida/frida-go v1.0.0 + +require github.com/google/uuid v1.6.0 // indirect diff --git a/onebot/go.sum b/onebot/go.sum new file mode 100644 index 0000000..caeaed6 --- /dev/null +++ b/onebot/go.sum @@ -0,0 +1,4 @@ +github.com/frida/frida-go v1.0.0 h1:Xlq1CB8QSAC6zbOFdjCX0oK8RjQGtdl2yATbUQKROwo= +github.com/frida/frida-go v1.0.0/go.mod h1:O8Dg1YBGfQsBEL1a8x3GURw/JllJrcuvg78ga2OgdM4= +github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0= +github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo= diff --git a/onebot/script.js b/onebot/script.js new file mode 100644 index 0000000..aecd811 --- /dev/null +++ b/onebot/script.js @@ -0,0 +1,515 @@ +// 1. 获取微信主模块的基地址 +var baseAddr = Process.getModuleByName("WeChat").base; +if (!baseAddr) { + console.error("[!] 找不到 WeChat 模块基址，请检查进程名。"); +} +console.log("[+] WeChat base address: " + baseAddr); + +// 触发函数地址,不同版本的地址看wechat_version 中的json文件复制过来 +var triggerFuncAddr = baseAddr.add(0x444A99C); +var sendMessageCallbackFunc = baseAddr.add(0xEDB4678); +var messageCallbackFunc1 = baseAddr.add(0x7f04f70); +var messageCallbackFunc2 = baseAddr.add(0x7f04fc8); +var messageCallbackFunc3 = baseAddr.add(0x7f96918); +var messageCallbackFunc4 = baseAddr.add(0x7f96a08); +var messageCallbackFunc5 = baseAddr.add(0x7f968a0); +// 这个必须是绝对位置 +var triggerX1Payload = ptr(0x175ED6600); +var req2bufEnterAddr = baseAddr.add(0x33EE8E8); +var req2bufExitAddr = baseAddr.add(0x33EFA00); +var protobufAddr = baseAddr.add(0x223EF58); +var receiveAddr = baseAddr.add(0x23B5348); + +// 触发函数X0参数地址 +var globalMessagePtr = ptr(0); + +// 消息体的一些指针地址 +var cgiAddr = ptr(0); +var callBackFuncAddr = ptr(0); +var sendMessageAddr = ptr(0); +var messageAddr = ptr(0); +var messageContentAddr = ptr(0); +var messageAddrAddr = ptr(0); +var contentAddr = ptr(0); +var insertMsgAddr = ptr(0); +// 消息的taskId +var taskIdGlobal = 0x20000090 // 最好比较大，不和原始的微信消息重复 +var receiverGlobal = "wxid_" +var contentGlobal = ""; +var lastSendTime = 0; +var messageId = 0; + +// 打印消息的地址，便于查询问题 +function printAddr() { + console.log("[+] Addresses:"); + console.log(" - cgiAddr: " + cgiAddr); + console.log(" - callBackFuncAddr: " + callBackFuncAddr); + console.log(" - sendMessageAddr: " + sendMessageAddr); + console.log(" - messageAddr: " + messageAddr); + console.log(" - messageContentAddr: " + messageContentAddr); + console.log(" - messageAddrAddr: " + messageAddrAddr); + console.log(" - contentAddr: " + contentAddr); + console.log(" - globalMessagePtr: " + globalMessagePtr); + console.log(" - triggerX1Payload: " + triggerX1Payload); +} + +// 辅助函数：写入 Hex 字符串 +function patchHex(addr, hexStr) { + const bytes = hexStr.split(' ').map(h => parseInt(h, 16)); + addr.writeByteArray(bytes); + addr.add(bytes.length).writeU8(0); // 终止符 +} + +// 初始化进行内存的分配 +function setupSendMessageDynamic() { + console.log("[+] Starting Dynamic Message Patching..."); + + // 1. 动态分配内存块（按需分配大小） + // 分配原则：字符串给 64-128 字节，结构体按实际大小分配 + cgiAddr = Memory.alloc(128); + callBackFuncAddr = Memory.alloc(16); + sendMessageAddr = Memory.alloc(256); + messageAddr = Memory.alloc(512); + messageContentAddr = Memory.alloc(32); + messageAddrAddr = Memory.alloc(32); + contentAddr = Memory.alloc(255); + + + // A. 写入字符串内容 + patchHex(cgiAddr, "2F 63 67 69 2D 62 69 6E 2F 6D 69 63 72 6F 6D 73 67 2D 62 69 6E 2F 6E 65 77 73 65 6E 64 6D 73 67"); + patchHex(contentAddr, " "); + + // B. 构建 SendMessage 结构体 (X24 基址位置) + sendMessageAddr.add(0x00).writeU64(0); + sendMessageAddr.add(0x08).writeU64(0); + sendMessageAddr.add(0x10).writePointer(sendMessageCallbackFunc); // 虚表地址通常仍需硬编码或从模块基址计算 + sendMessageAddr.add(0x18).writeU64(1); + sendMessageAddr.add(0x20).writeU32(taskIdGlobal); + sendMessageAddr.add(0x28).writePointer(messageAddr); // 指向动态分配的 Message + + console.log(" [+] sendMessageAddr Object: ", hexdump(sendMessageAddr, { + offset: 0, + length: 48, + header: true, + ansi: true + })); + + // C. 构建 Message 结构体 + messageAddr.add(0x00).writePointer(messageCallbackFunc1); + messageAddr.add(0x08).writeU32(taskIdGlobal); + messageAddr.add(0x0c).writeU32(0x20a); + messageAddr.add(0x10).writeU64(0x3); + messageAddr.add(0x18).writePointer(cgiAddr); + + // 设置一些固定值 + messageAddr.add(0x20).writeU64(uint64("0x20")); + messageAddr.add(0x28).writeU64(uint64("0x8000000000000030")); + messageAddr.add(0x30).writeU64(uint64("0x0000000001010100")); + messageAddr.add(0x58).writeU64(uint64("0x0101010100000001")); + + // 处理回调地址 + callBackFuncAddr.writePointer(messageCallbackFunc2); + messageAddr.add(0x98).writePointer(callBackFuncAddr); + + // 设置内容指针 + messageAddr.add(0xb8).writePointer(messageCallbackFunc3); + messageAddr.add(0xc0).writePointer(messageContentAddr); + messageAddr.add(0xc8).writeU64(uint64("0x0000000100000001")); + messageAddr.add(0xd0).writeU64(0x4); + messageAddr.add(0xd8).writeU64(0x1); + messageAddr.add(0xe0).writeU64(0x1); + messageAddr.add(0xe8).writePointer(messageCallbackFunc4); + + + messageContentAddr.writePointer(messageAddrAddr); + messageAddrAddr.writePointer(messageCallbackFunc5); + messageAddrAddr.add(0x08).writePointer(contentAddr); + + console.log(" [+] messageAddr Object: ", hexdump(messageAddr, { + offset: 0, + length: 64, + header: true, + ansi: true + })); + + console.log(" [+] Dynamic Memory Setup Complete. - Message Object: " + messageAddr); +} + +setImmediate(setupSendMessageDynamic); + +// 设置trigger函数的x0参数 +function setTriggerAttach() { + console.log("[+] WeChat Base: " + baseAddr + "[+] Attaching to: " + triggerFuncAddr); + + // 3. 开始拦截 + Interceptor.attach(triggerFuncAddr, { + onEnter: function (args) { + console.log("[+] Entered Function: 0x10444A99C"); + + if (!globalMessagePtr.isNull()) { + return; + } + + globalMessagePtr = this.context.x0; + console.log("[+] globalMessagePtr 当前 X0 的指针值: " + globalMessagePtr); + }, + onLeave: function (retval) { + } + }); +} + +// 使用 setImmediate 确保在模块加载后执行 +setImmediate(setTriggerAttach); + + +function manualTrigger(taskId, receiver, content) { + console.log("[+] Manual Trigger Started..."); + if (globalMessagePtr.isNull()) { + console.error("[!] globalMessagePtr is NULL, cannot trigger!"); + return "fail"; + } + + if (!taskId || !receiver || !content) { + console.error("[!] taskId or Receiver or Content is empty!"); + return "fail"; + } + + // 获取当前时间戳 (秒) + const timestamp = Math.floor(Date.now() / 1000); + // 全局变量不为空，并且上次发送时间小于1s，不给发送 + if ((taskIdGlobal !== 0 || receiverGlobal !== "" || contentGlobal !== "") && lastSendTime + 1 > timestamp) { + console.error("[!] taskId or receiver or content is not empty!"); + return "fail"; + } + + lastSendTime = timestamp + taskIdGlobal = taskId; + receiverGlobal = receiver; + contentGlobal = content; + + messageAddr.add(0x08).writeU32(taskIdGlobal); + sendMessageAddr.add(0x20).writeU32(taskIdGlobal); + messageAddrAddr.add(0x18).writeU32(timestamp); + + const payloadData = [ + 0x0A, 0x02, 0x00, 0x00, // 0x00 + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x08 + 0x03, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, // 0x10 + 0x40, 0xec, 0x0e, 0x12, 0x01, 0x00, 0x00, 0x00, // 0x18 + 0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x20 + 0x30, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80, // 0x28 + 0x00, 0x01, 0x01, 0x01, 0x00, 0xAA, 0xAA, 0xAA, // 0x30 + 0x00, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, // 0x38 + 0x01, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0xFF, 0xFF, // 0x40 + 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0xAA, 0xAA, 0xAA, // 0x48 + 0xFF, 0xFF, 0xFF, 0xFF, 0xAA, 0xAA, 0xAA, 0xAA, // 0x50 + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x58 + 0x0A, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x60 + 0x64, 0x65, 0x66, 0x61, 0x75, 0x6C, 0x74, 0x2D, // 0x68 default- + 0x6C, 0x6F, 0x6E, 0x67, 0x6C, 0x69, 0x6E, 0x6B, // 0x70 longlink + 0x00, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0x10, // 0x78 + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x80 + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x88 + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x90 + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x98 + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0xA0 + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0xA8 + 0x00, 0x00, 0x00, 0x00, 0xAA, 0xAA, 0xAA, 0xAA, // 0xB0 + 0xC0, 0x66, 0xED, 0x75, 0x01, 0x00, 0x00, 0x00, // 0xB8 + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0xC0 + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0xC8 + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0xD0 + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0xD8 + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0xE0 + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0xE8 + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0xF0 + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0xF8 + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x100 + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x108 + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x110 + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x118 + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x120 + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x128 + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x130 + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x138 + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x140 + 0x01, 0x00, 0x00, 0x00, 0xAA, 0xAA, 0xAA, 0xAA, // 0x148 + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x150 + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x158 + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x160 + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x168 + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x170 + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x178 + 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x180 + 0x00, 0x00, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, // 0x188 + 0x98, 0x67, 0xED, 0x75, 0x01, 0x00, 0x00, 0x00, // 0x190 + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x198 + ]; + + // 从 0x175ED6604 开始写入 Payload + triggerX1Payload.writeU32(taskIdGlobal); + triggerX1Payload.add(0x04).writeByteArray(payloadData); + triggerX1Payload.add(0x18).writePointer(cgiAddr); + + const sub_10444A99C = new NativeFunction(triggerFuncAddr, 'uint64', ['pointer', 'pointer']); + + // 5. 调用函数 + try { + const arg1 = globalMessagePtr; // 第一个指针参数 + const arg2 = triggerX1Payload; // 第二个参数 0x175ED6600 + console.log(`[+] Calling trigger function at ${triggerFuncAddr} with args: (${arg1}, ${arg2})`); + const result = sub_10444A99C(arg1, arg2); + console.log("[+] Execution trigger function Success. Return value: " + result); + return "ok"; + } catch (e) { + console.error("[!] Error trigger function during execution: " + e); + return "fail"; + } +} + + +// ReqBuf 进行拦截，替换入参数的消息指针 +function attachReq2buf() { + + console.log("[+] Target Req2buf enter Address: " + req2bufEnterAddr); + + // 2. 开始拦截 + Interceptor.attach(req2bufEnterAddr, { + onEnter: function (args) { + if (!this.context.x1.equals(taskIdGlobal)) { + return; + } + + console.log("[+] 已命中目标Req2Buf地址:0x1033EE8E8 taskId:" + taskIdGlobal + "base:" + baseAddr); + + // 3. 获取 X24 寄存器的值 + const x24_base = this.context.x24; + insertMsgAddr = x24_base.add(0x60); + + console.log("[+] 当前 Req2Buf X24 基址: " + x24_base); + console.log("[+] 准备修改位置 Req2Buf (X24 + 0x60): " + insertMsgAddr, hexdump(insertMsgAddr, { + offset: 0, + length: 16, + header: true, + ansi: true + })); + + if (typeof sendMessageAddr !== 'undefined') { + insertMsgAddr.writePointer(sendMessageAddr); + console.log("[+] 成功! Req2Buf 已将 X24+0x60 指向新地址: " + sendMessageAddr + + "[+] Req2Buf 写入后内存预览: " + insertMsgAddr, hexdump(insertMsgAddr, { + offset: 0, + length: 16, + header: true, + ansi: true + })); + } else { + console.error("[!] 错误: 变量 sendMessageAddr 未定义，请确保已运行分配逻辑。"); + } + } + }); + + // 在出口处拦截req2buf，把insertMsgAddr设置为0，避免被垃圾回收导致整个程序崩溃 + console.log("[+] Target Req2buf leave Address: " + req2bufExitAddr); + Interceptor.attach(req2bufExitAddr, { + onEnter: function (args) { + if (!this.context.x25.equals(taskIdGlobal)) { + return; + } + insertMsgAddr.writeU64(0x0); + console.log("[+] 0x1033EFA00 清空写入后内存预览: " + insertMsgAddr.readPointer()); + taskIdGlobal = 0; + receiverGlobal = ""; + contentGlobal = ""; + } + }); +} + +setImmediate(attachReq2buf); + +// 辅助函数：Protobuf Varint 编码 (对应 get_varint_timestamp_bytes) +function getVarintTimestampBytes() { + let ts = Math.floor(Date.now() / 1000); + let encodedBytes = []; + let tempTs = ts >>> 0; // 强制转为 32位 无符号整数 + + while (true) { + let byte = tempTs & 0x7F; + tempTs >>>= 7; + if (tempTs !== 0) { + encodedBytes.push(byte | 0x80); + } else { + encodedBytes.push(byte); + break; + } + } + return encodedBytes; +} + +function stringToHexArray(str) { + var utf8Str = unescape(encodeURIComponent(str)); + var arr = []; + for (var i = 0; i < utf8Str.length; i++) { + arr.push(utf8Str.charCodeAt(i)); // 获取字符的 ASCII 码 (即十六进制值) + } + return arr; +} + +function generateRandom5ByteVarint() { + let res = []; + + // 前 4 个字节：最高位(bit 7)必须是 1，低 7 位随机 + for (let i = 0; i < 4; i++) { + let random7Bit = Math.floor(Math.random() * 128); + res.push(random7Bit | 0x80); // 强制设置最高位为 1 + } + + // 第 5 个字节：最高位必须是 0，为了确保不变成 4 字节，低 7 位不能全为 0 + let lastByte = Math.floor(Math.random() * 127) + 1; + res.push(lastByte & 0x7F); // 确保最高位为 0 + + return res; +} + +// 拦截 Protobuf 编码逻辑，注入自定义 Payload +function attachProto() { + + console.log("[+] proto注入拦截目标地址: " + protobufAddr); + + const x1_custom_addr = Memory.alloc(256); + console.log("[+] Frida 分配的 Payload 地址: " + x1_custom_addr); + + Interceptor.attach(protobufAddr, { + onEnter: function (args) { + if (lastSendTime === 0) { + console.error("[+] 首次发送时间未记录，跳过注入"); + return; + } + + const prefix = [ + 0x08, 0x01, 0x12, 0x5E, 0x0A, 0x15, 0x0A, 0x13, // 0x00 + ]; + + const receiverProto = stringToHexArray(receiverGlobal); + const contentProto = stringToHexArray(contentGlobal); + const contentHeader = [0x12, contentProto.length]; + const tsHeader = [0x18, 0x01, 0x20]; + const tsBytes = getVarintTimestampBytes(); + const msgIdHeader = [0x28] + const msgId = generateRandom5ByteVarint() + + const suffix = [ + 0x32, 0x32, 0x3C, // 0x28 头部 + 0x6D, 0x73, 0x67, 0x73, 0x6F, 0x73, 0x75, 0x72, // 0x30 msgsour + 0x63, 0x65, 0x3E, 0x3C, 0x61, 0x6C, 0x6E, 0x6F, // 0x38 ce>1 + 0x3C, 0x2F, 0x66, 0x72, 0x3E, 0x3C, 0x2F, 0x61, // 0x48 . + ]; + + // 合并数组 + const finalPayload = prefix.concat(receiverProto).concat(contentHeader).concat(contentProto).concat(tsHeader).concat(tsBytes).concat(msgIdHeader).concat(msgId).concat(suffix); + + x1_custom_addr.writeByteArray(finalPayload); + console.log("[+] Payload 已写入，长度: " + finalPayload.length); + + this.context.x1 = x1_custom_addr; + this.context.x2 = ptr(finalPayload.length); + + console.log("[+] 寄存器修改完成: X1=" + this.context.x1 + ", X2=" + this.context.x2, hexdump(x1_custom_addr, { + offset: 0, + length: 128, + header: true, + ansi: true + })); + } + }); +} + +setImmediate(attachProto); + +function setReceiver() { + console.log("[+] WeChat Base: " + baseAddr + "[+] Attaching to: " + receiveAddr); + + // 3. 开始拦截 + Interceptor.attach(receiveAddr, { + onEnter: function (args) { + console.log("[+] Entered Receive Function: 0x1023B5348"); + const x1 = this.context.x1; + var sender = x1.add(0x18).readUtf8String(); + var receiver = x1.add(0x30).readUtf8String(); + + // 3. 从 0xd0 开始处理 + var d0Pos = x1.add(0xd0); + var strD0 = ""; + + if (isPrintableOrChinese(d0Pos)) { + strD0 = d0Pos.readUtf8String(); + console.log("[+] 0xd0 处不是指针，直接读取完毕"); + } else { + // 情况 B：不符合特征（如包含乱码位或指针特征），视为指针 + var ptrD0 = d0Pos.readPointer(); + if (!ptrD0.isNull() && Process.findRangeByAddress(ptrD0)) { + strD0 = ptrD0.readUtf8String(); + console.log("[+] 0xd0 识别为：指针跳转读取"); + } else { + strD0 = "Invalid Data/Pointer"; + } + } + + messageId++ + send({ + message_type: "private", + user_id: sender, + self_id: receiver, + message_id: messageId, + type: "send", + raw: {peerUid: receiver}, + message: [{type: "text", data: {text: strD0}}] + }) + }, + }); +} + +// 使用 setImmediate 确保在模块加载后执行 +setImmediate(setReceiver) + +/** + * 扫描内存直到 \0，判断中间内容是否全部为可见字符或汉字 + */ +function isPrintableOrChinese(startPtr) { + let offset = 0; + const maxScanLength = 8; + + while (offset < maxScanLength) { + let b = startPtr.add(offset).readU8(); + + if (b === 0) { + // 扫描到 \0，且之前没有发现异常字节 + return offset > 0; // 如果第一个就是 \0，视为非字符串（可能是空指针） + } + + // 判定逻辑： + // 1. 可见 ASCII (32-126) 或 换行/制表符 (9, 10, 13) + let isAscii = (b >= 32 && b <= 126) || (b === 9 || b === 10 || b === 13); + + // 2. 汉字 UTF-8 特征：第一个字节通常 >= 0x80 (128) + // 严谨点：UTF-8 汉字首字节通常在 0xE4-0xE9 之间，后续字节在 0x80-0xBF 之间 + // 这里简化处理：如果是高位字符，我们暂时放行，由 readUtf8String 最终处理 + let isHighBit = (b >= 0x80); + + if (!isAscii && !isHighBit) { + // 发现既不是 ASCII 也不是高位字节（如 0x01-0x1F 的控制字符），判定为指针 + return false; + } + offset++; + } + return true; +} + + +rpc.exports = { + manualTrigger: manualTrigger +}; \ No newline at end of file