tools/wechat_chatter
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wechat_chatter/frida/text.js
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yincong ef3ccfb3d2 update 4.1.9.52
2026-05-09 14:07:15 +08:00

449 lines
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JavaScript
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var targetPath = "/Applications/WeChat.app/Contents/Resources/wechat.dylib";
var module = Process.enumerateModules().find(function(m) {
return m.path === targetPath;
});
const baseAddr = module.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);
// -------------------------基础函数分区-------------------------
function toVarint(n) {
let res = [];
while (n >= 128) {
res.push((n & 0x7F) | 0x80); // 取后7位，最高位置1
n = n >> 7; // 右移7位
}
res.push(n); // 最后一位最高位为0
return res;
}
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;
}
// 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 patchString(addr, plainStr) {
const bytes = [];
for (let i = 0; i < plainStr.length; i++) {
bytes.push(plainStr.charCodeAt(i));
}
addr.writeByteArray(bytes);
addr.add(bytes.length).writeU8(0);
}
// -------------------------基础函数分区-------------------------
// -------------------------全局变量分区-------------------------
// 文本消息全局变量
var textCallbackFuncAddr = baseAddr.add(0x26779D4);
var protobufAddr = textCallbackFuncAddr.add(0x40);
var patchTextProtobufAddr = textCallbackFuncAddr.add(0x20);
var patchTextProtobufByte
var patchTextProtobufDeleteAddr = textCallbackFuncAddr.add(0x5C);
var patchTextProtobufDeleteByte
var textCgiAddr = ptr(0);
var sendTextMessageAddr = ptr(0);
var textMessageAddr = ptr(0);
var textProtoX1PayloadAddr = ptr(0);
var sendMessageCallbackFunc = baseAddr.add(0x8C2C880);
// 双方公共使用的地址
var triggerX1Payload;
var triggerX0;
var req2bufEnterAddr = baseAddr.add(0x39d51d8);
var req2bufExitAddr = baseAddr.add(0x39D62EC);
var sendFuncAddr = baseAddr.add(0x4bd0e1c);
var insertMsgAddr = ptr(0);
var sendMsgType = "";
// 发送消息的全局变量
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 senderGlobal = "wxid_"
var lastSendTime = 0;
var atUserGlobal = "";
// -------------------------全局变量分区-------------------------
// -------------------------发送文本消息分区-------------------------
// 初始化进行内存的分配
function setupSendTextMessageDynamic() {
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
textCgiAddr = Memory.alloc(128);
sendTextMessageAddr = Memory.alloc(256);
textMessageAddr = Memory.alloc(256);
triggerX1Payload = Memory.alloc(1024)
// A. 写入字符串内容
patchString(textCgiAddr, "/cgi-bin/micromsg-bin/newsendmsg");
// B. 构建 sendTextMessageAddr 结构体 (X24 基址位置)
sendTextMessageAddr.add(0x00).writeU64(0);
sendTextMessageAddr.add(0x08).writeU64(0);
sendTextMessageAddr.add(0x10).writeU64(0);
sendTextMessageAddr.add(0x18).writeU64(1);
sendTextMessageAddr.add(0x20).writeU32(taskIdGlobal);
sendTextMessageAddr.add(0x28).writePointer(textMessageAddr); // 指向动态分配的 Message
console.log(" [+] sendTextMessageAddr Object: ", hexdump(sendTextMessageAddr, {
offset: 0,
length: 48,
header: true,
ansi: true
}));
// C. 构建 Message 结构体
textMessageAddr.add(0x00).writePointer(sendMessageCallbackFunc);
textMessageAddr.add(0x08).writeU32(taskIdGlobal);
textMessageAddr.add(0x0c).writeU32(0x20a);
textMessageAddr.add(0x10).writeU64(0x3);
textMessageAddr.add(0x18).writePointer(textCgiAddr);
textMessageAddr.add(0x20).writeU64(uint64("0x20"));
console.log(" [+] textMessageAddr Object: ", hexdump(textMessageAddr, {
offset: 0,
length: 64,
header: true,
ansi: true
}));
console.log("[+] Dynamic Memory Setup Complete. - Message Object: " + textMessageAddr);
patchTextProtobufByte = patchTextProtobufAddr.readByteArray(4);
patchTextProtobufDeleteByte = patchTextProtobufDeleteAddr.readByteArray(4);
}
setImmediate(setupSendTextMessageDynamic);
function patchTextProtoBuf() {
Interceptor.attach(textCallbackFuncAddr, {
onEnter: function (args) {
var firstValue = this.context.sp.readU32();
if (firstValue === taskIdGlobal) {
if (patchTextProtobufAddr.readU32() !== 3573751839) {
Memory.patchCode(patchTextProtobufAddr, 4, code => {
const cw = new Arm64Writer(code, {pc: patchTextProtobufAddr});
cw.putNop();
cw.flush();
});
Memory.patchCode(patchTextProtobufDeleteAddr, 4, code => {
const cw = new Arm64Writer(code, {pc: patchTextProtobufDeleteAddr});
cw.putNop();
cw.flush();
});
}
} else {
if (patchTextProtobufAddr.readU32() === 3573751839) {
Memory.patchCode(patchTextProtobufAddr, 4, code => {
const cw = new Arm64Writer(code, {pc: patchTextProtobufAddr});
cw.putBytes(new Uint8Array(patchTextProtobufByte));
cw.flush();
});
Memory.patchCode(patchTextProtobufDeleteAddr, 4, code => {
const cw = new Arm64Writer(code, {pc: patchTextProtobufDeleteAddr});
cw.putBytes(new Uint8Array(patchTextProtobufDeleteByte));
cw.flush();
});
}
}
}
})
}
setImmediate(patchTextProtoBuf);
function triggerSendTextMessage(taskId, receiver, content, atUser) {
console.log("[+] Manual Trigger Started...");
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);
lastSendTime = timestamp
taskIdGlobal = taskId;
receiverGlobal = receiver;
contentGlobal = content;
atUserGlobal = atUser
console.log("taskIdGlobal: " + taskIdGlobal + ", receiverGlobal: " + receiverGlobal + ", contentGlobal: " + contentGlobal + ", atUserGlobal: " + atUserGlobal);
textMessageAddr.add(0x08).writeU32(taskIdGlobal);
sendTextMessageAddr.add(0x20).writeU32(taskIdGlobal);
const payloadData = [
0x0A, 0x02, 0x00, 0x00, // 0x00
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x08
0x03, 0x00, 0x00, 0x00, 0x01, 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
0x00, 0x00, 0x00, 0x00, 0x00, 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, // 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
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x190
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x198
];
triggerX1Payload.writeU32(taskIdGlobal);
triggerX1Payload.add(0x04).writeByteArray(payloadData);
triggerX1Payload.add(0x18).writePointer(textCgiAddr);
triggerX1Payload.add(0xb8).writePointer(triggerX1Payload.add(0xc0));
triggerX1Payload.add(0x190).writePointer(triggerX1Payload.add(0x198));
sendMsgType = "text"
console.log("finished init payload")
const MMStartTask = new NativeFunction(sendFuncAddr, 'int64', ['pointer', 'pointer']);
// 5. 调用函数
try {
const result = MMStartTask(triggerX0, triggerX1Payload);
console.log(`[+] Execution MMStartTask ${sendFuncAddr} with args: (${triggerX0}) (${triggerX1Payload}) Success. Return value: ` + result);
return "ok";
} catch (e) {
console.error(`[!] Error trigger MMStartTask ${sendFuncAddr} with args: (${triggerX0}) (${triggerX1Payload}), during execution: ` + e);
return "fail";
}
}
function AttachSendTextProto() {
Interceptor.attach(sendFuncAddr.add(0x10), {
onEnter: function (args) {
if (triggerX0) {
return
}
triggerX0 = this.context.x0;
console.log(`[+] 捕获到 MMStartTask 调用，X0地址：${triggerX0}`);
}
})
}
setImmediate(AttachSendTextProto);
// 拦截 SendTextProto 编码逻辑，注入自定义 Payload
function attachSendTextProto() {
console.log("[+] proto注入拦截目标地址: " + protobufAddr);
textProtoX1PayloadAddr = Memory.alloc(3096);
console.log("[+] Frida 分配的 Payload 地址: " + textProtoX1PayloadAddr);
Interceptor.attach(protobufAddr, {
onEnter: function (args) {
var sp = this.context.sp;
var firstValue = sp.readU32();
if (firstValue !== taskIdGlobal) {
console.log("[+] Protobuf 拦截未命中，跳过...");
return;
}
console.log(`[+] 正在注入 Protobuf Payload content: ${contentGlobal}, receiver: ${receiverGlobal}, atUser: ${atUserGlobal}`);
const type = [0x08, 0x01, 0x12]
const receiverHeader = [0x0A, receiverGlobal.length + 2, 0x0A, receiverGlobal.length];
const receiverProto = stringToHexArray(receiverGlobal);
const contentProto = stringToHexArray(contentGlobal);
const contentHeader = [0x12, ...toVarint(contentProto.length)];
const tsHeader = [0x18, 0x01, 0x20];
const tsBytes = getVarintTimestampBytes();
const msgIdHeader = [0x28]
const msgId = generateRandom5ByteVarint()
const htmlUpperPart = [0x3C, 0x6D, 0x73, 0x67, 0x73, 0x6F, 0x75, 0x72, 0x63, 0x65, 0x3E]
let atUserHeader = []
if (atUserGlobal) {
atUserHeader = atUserHeader.concat([0x3C, 0x61, 0x74, 0x75, 0x73, 0x65, 0x72, 0x6c, 0x69, 0x73, 0x74, 0x3e]).concat(stringToHexArray(atUserGlobal)).concat([0x3C, 0x2F, 0x61, 0x74, 0x75, 0x73, 0x65, 0x72, 0x6C, 0x69, 0x73, 0x74, 0x3E])
}
const htmlLowerPart = [0x3C, 0x61, 0x6C, 0x6E, 0x6F,
0x64, 0x65, 0x3E, 0x3C, 0x66, 0x72, 0x3E, 0x31,
0x3C, 0x2F, 0x66, 0x72, 0x3E, 0x3C, 0x2F, 0x61,
0x6C, 0x6E, 0x6F, 0x64, 0x65, 0x3E, 0x3C, 0x2F,
0x6D, 0x73, 0x67, 0x73, 0x6F, 0x75, 0x72,
0x63, 0x65, 0x3E, 0x00]
const htmlHeader = [0x32, htmlUpperPart.length + atUserHeader.length + htmlLowerPart.length]
const valueLen = toVarint(receiverHeader.length + receiverProto.length + contentHeader.length +
contentProto.length + tsHeader.length + tsBytes.length + msgIdHeader.length + msgId.length + htmlHeader.length +
htmlUpperPart.length + atUserHeader.length + htmlLowerPart.length)
// 合并数组
const finalPayload = type.concat(valueLen).concat(receiverHeader).concat(receiverProto).concat(contentHeader).concat(contentProto).concat(tsHeader).concat(tsBytes).concat(msgIdHeader).concat(msgId).concat(htmlHeader).concat(htmlUpperPart).concat(atUserHeader).concat(htmlLowerPart);
textProtoX1PayloadAddr.writeByteArray(finalPayload);
this.context.x1 = textProtoX1PayloadAddr;
this.context.x2 = ptr(finalPayload.length);
console.log("[+] 寄存器修改完成: X1=" + this.context.x1 + ", X2=" + this.context.x2, hexdump(textProtoX1PayloadAddr, {
offset: 0,
length: 128,
header: true,
ansi: true
}));
},
});
}
setImmediate(attachSendTextProto);
// -------------------------发送文本消息分区-------------------------
// -------------------------Req2Buf公共部分分区-------------------------
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);
if (typeof sendTextMessageAddr !== 'undefined') {
if (sendMsgType === "text") {
insertMsgAddr.writePointer(sendTextMessageAddr);
console.log("[+] 发送文本消息成功! Req2Buf 已将 X24+0x60 指向新地址: " + sendTextMessageAddr +
"[+] Req2Buf 写入后内存预览: " + insertMsgAddr);
} else if (sendMsgType === "img") {
insertMsgAddr.writePointer(sendImgMessageAddr);
console.log("[+] 发送图片消息成功! Req2Buf 已将 X24+0x60 指向新地址: " + sendImgMessageAddr +
"[+] Req2Buf 写入后内存预览: " + insertMsgAddr);
}
} else {
console.error("[!] 错误: 变量 sendTextMessageAddr 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("[+] 清空写入后内存预览: " + insertMsgAddr.readPointer());
taskIdGlobal = 0;
receiverGlobal = "";
senderGlobal = "";
contentGlobal = "";
atUserGlobal = "";
send({
type: "finish",
})
}
});
}
setImmediate(attachReq2buf);
// -------------------------Req2Buf公共部分分区-------------------------
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