1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
| import { promises } from "node:fs";
import { EventEmitter } from "node:events";
import path from "node:path";
import * as frida from "frida";
import WebSocket, { WebSocketServer } from "ws";
const codex = require("./third-party/RemoteDebugCodex.js");
const messageProto = require("./third-party/WARemoteDebugProtobuf.js");
class DebugMessageEmitter extends EventEmitter {};
const DEBUG_PORT = 9421;
const CDP_PORT = 62000;
const DEBUG = false;
const debugMessageEmitter = new DebugMessageEmitter();
const **bufferToHexString** = (_buffer_: ArrayBuffer) => {
return Array.from(new Uint8Array(_buffer_)).map(_byte_ => _byte_.toString(16).padStart(2, '0')).join("");
}
const **debug_server** = () => {
const wss = new WebSocketServer({ port: DEBUG_PORT, host: '0.0.0.0' });
console.log(`[server] debug server running on ws://0.0.0.0:${DEBUG_PORT}`);
let messageCounter = 0;
const **onMessage** = (_message_: ArrayBuffer) => {
DEBUG && console.log(`[client] received raw message (hex): ${bufferToHexString(_message_)}`);
let unwrappedData: any = null;
try {
const decodedData = messageProto.mmbizwxadevremote.WARemoteDebug_DebugMessage.decode(_message_);
unwrappedData = codex.unwrapDebugMessageData(decodedData);
DEBUG && console.log(`[client] [DEBUG] decoded data:`);
DEBUG && console.dir(unwrappedData)
} catch (e) {
console.error(`[client] err: ${e}`);
}
if (unwrappedData === null) {
return;
}
if (unwrappedData.category === "chromeDevtoolsResult") {
_
debugMessageEmitter.emit("cdpmessage", unwrappedData.data.payload);
}
}
wss.on("connection", (_ws_: WebSocket) => {
console.log("[conn] miniapp client connected");
_ws_.on("message", onMessage);
_ws_.on("error", (_err_) => {console.error("[client] err:", _err_)});
_ws_.on("close", () => {console.log("[client] client disconnected")});
});
debugMessageEmitter.on("proxymessage", (_message_: string) => {
wss && wss.clients.forEach(_client_ => {
if (_client_.readyState === WebSocket.OPEN) {
_
_
const rawPayload = {
jscontext_id: "",
op_id: Math.round(100 * Math.random()),
payload: _message_.toString()
};
DEBUG && console.log(rawPayload);
const wrappedData = codex.wrapDebugMessageData(rawPayload, "chromeDevtools", 0);
const outData = {
seq: ++messageCounter,
category: "chromeDevtools",
data: wrappedData.buffer,
compressAlgo: 0,
originalSize: wrappedData.originalSize
}
const encodedData = messageProto.mmbizwxadevremote.WARemoteDebug_DebugMessage.encode(outData).finish();
_client_.send(encodedData, { binary: true });
}
});
});
}
const **proxy_server** = () => {
const wss = new WebSocketServer({ port: CDP_PORT, host: '0.0.0.0' });
console.log(`[server] proxy server running on ws://0.0.0.0:${CDP_PORT}`);
const **onMessage** = (_message_: string) => {
debugMessageEmitter.emit("proxymessage", _message_);
}
wss.on("connection", (_ws_: WebSocket) => {
console.log("[conn] CDP client connected");
_ws_.on("message", onMessage);
_ws_.on("error", (_err_) => {console.error("[client] CDP err:", _err_)});
_ws_.on("close", () => {console.log("[client] CDP client disconnected")});
});
debugMessageEmitter.on("cdpmessage", (_message_: string) => {
wss && wss.clients.forEach(_client_ => {
if (_client_.readyState === WebSocket.OPEN) {
_
_client_.send(_message_);
}
});
});
}
const **frida_server** = async () => {
const localDevice = await frida.getLocalDevice();
const processes = await localDevice.enumerateProcesses({scope: frida.Scope.Metadata});
const wmpfProcesses = processes.filter(_process_ => _process_.name === "WeChatAppEx.exe");
const wmpfPids = wmpfProcesses.map(_p_ => _p_.parameters.ppid ? _p_.parameters.ppid : 0);
_
const wmpfPid = wmpfPids.sort((_a_, _b_) => wmpfPids.filter(_v_ => _v_ === _a_).length - wmpfPids.filter(_v_ => _v_ === _b_).length).pop();
if (wmpfPid === undefined) {
throw new Error("[frida] WeChatAppEx.exe process not found");
return;
}
const wmpfProcess = processes.filter(_process_ => _process_.pid === wmpfPid)[0];
const wmpfVersionMatch = wmpfProcess.parameters.path ? wmpfProcess.parameters.path.match(/\d+/g) : "";
const wmpfVersion = wmpfVersionMatch ? new Number(wmpfVersionMatch.pop()) : 0;
if (wmpfVersion === 0) {
throw new Error("[frida] error in find wmpf version");
return;
}
_
const session = await localDevice.attach(wmpfPid);
_
const projectRoot = path.join(path.dirname(require.main && require.main.filename || process.mainModule && process.mainModule.filename || process.cwd()), "..");
let scriptContent: string | null = null;
try {
scriptContent = (await promises.readFile(path.join(projectRoot, "frida/hook.js"))).toString();
} catch (e) {
throw new Error("[frida] hook script not found");
return;
}
let configContent: string | null = null;
try {
configContent = (await promises.readFile(path.join(projectRoot, "frida/config", `addresses.${wmpfVersion}.json`))).toString();
configContent = JSON.stringify(JSON.parse(configContent));
} catch(e) {
throw new Error(`[frida] version config not found: ${wmpfVersion}`);
}
if (scriptContent === null || configContent === null) {
throw new Error("[frida] unable to find hook script");
return;
}
_
const script = await session.createScript(scriptContent.replace("@@CONFIG@@", configContent));
script.message.connect(_message_ => {
console.log("[frida client]", _message_);
});
await script.load();
console.log(`[frida] script loaded, WMPF version: ${wmpfVersion}, pid: ${wmpfPid}`);
}
const **main** = async () => {
debug_server();
proxy_server();
frida_server();
}
(async () => {
await main();
})();
|
