dfpReport: 确定加密为逐字节XOR(动态keystream)+同步pair捕获+IDA导出线索, 记录破解进度

2026-08-26 14:17:58 +08:00
parent acb0a737eb
commit 4eec01568f
38 changed files with 4942 additions and 3 deletions
@@ -0,0 +1,137 @@
+#!/usr/bin/env python3
+"""dump 设备运行时 libhydeviceid.so 的 datadiv 解密区(就地解密=明文)。
+
+datadiv 解码器在 JNI_OnLoad 时把 0x3c8xxx 数据段密文就地解密为明文。
+直接 dump 该区域 + 扫描全进程可读字符串(android- 等), 命中即持久化。
+"""
+from __future__ import annotations
+
+import json
+import time
+from pathlib import Path
+
+import frida
+
+RE = Path("/Users/yml/codes/Reverse-Engineering-Agent-Universal-v3.0")
+OUT = Path("/Users/yml/codes/douyu_login_py/evidence/dfp_runtime_strings.json")
+
+JS = r"""
+'use strict';
+Process.setExceptionHandler(function(d){ return true; });
+send({type:'armed'});
+
+function hex(p, n){
+  try{ return Array.from(new Uint8Array(p.readByteArray(n))).map(x=>('0'+x.toString(16)).slice(-2)).join(''); }
+  catch(e){ return 'ERR'; }
+}
+
+// 1. dump libhydeviceid.so 数据段 (datadiv 就地解密区 0x3c8000 ~ 0x3ca000)
+function dumpModuleData(){
+  var m = null;
+  try{ m = Process.getModuleByName('libhydeviceid.so'); }catch(e){ return; }
+  [0x3c8000, 0x3ca000, 0x3cc000, 0x3d0000, 0x3e0000].forEach(function(off){
+    try{
+      var base = m.base.add(off);
+      var buf = base.readByteArray(0x2000);
+      var bytes = Array.from(new Uint8Array(buf));
+      // 提取可读字符串
+      var strs = [];
+      var cur = '';
+      for (var i = 0; i < bytes.length; i++) {
+        var c = bytes[i];
+        if (c >= 32 && c < 127) { cur += String.fromCharCode(c); }
+        else {
+          if (cur.length >= 5) strs.push(cur);
+          cur = '';
+        }
+      }
+      if (strs.length) {
+        send({type:'datastr', off:off.toString(16), n:strs.length,
+              strs: strs.slice(0, 40)});
+      }
+      // 搜魔数
+      var hexs = bytes.map(function(x){return ('0'+x.toString(16)).slice(-2);}).join('');
+      if (hexs.indexOf('571882cf') >= 0) send({type:'magic_in_data', off:off.toString(16)});
+    }catch(e){}
+  });
+}
+
+// 2. 全进程扫描明文设备数据 (android- / UA / JSON)
+function scanPlain(){
+  try{
+    Process.enumerateRanges('r--').forEach(function(r){
+      if (r.size > 1024*1024*128) return;
+      try{
+        // 找 "android-" 出现且周围有可读文本
+        var hits = Memory.scanSync(r.base, r.size, '61 6e 64 72 6f 69 64 2d');
+        hits.slice(0, 30).forEach(function(x){
+          var ctx = '';
+          try{ ctx = x.address.sub(64).readUtf8String(); }catch(e){}
+          send({type:'plain', addr:String(x.address), ctx: (ctx || '').slice(0, 200)});
+        });
+      }catch(e){}
+    });
+  }catch(e){}
+  send({type:'scan_done'});
+}
+
+dumpModuleData();
+setTimeout(function(){ scanPlain(); }, 2000);
+"""
+
+
+def main():
+    device = frida.get_device_manager().add_remote_device("127.0.0.1:31877")
+    pid = device.spawn(["com.duowan.kiwi"])
+    print(f"[*] spawned pid={pid}", flush=True)
+    session = device.attach(pid)
+
+    events = []
+
+    def on_message(message, data):
+        if message.get("type") == "error":
+            print("[JS-ERR]", str(message)[:200], flush=True); return
+        if message.get("type") != "send":
+            return
+        p = message.get("payload") or {}
+        t = p.get("type")
+        if t == "datastr":
+            print(f"[datastr] off=0x{p.get('off')} {p.get('n')} 条:", flush=True)
+            for s in p.get('strs', []):
+                print(f"    {s}", flush=True)
+            events.append(p)
+            OUT.write_text(json.dumps(events, indent=1))
+        elif t == "magic_in_data":
+            print(f"[MAGIC-IN-DATA] off=0x{p.get('off')}", flush=True)
+        elif t == "plain":
+            print(f"[plain] @{p.get('addr')}: {p.get('ctx')!r}", flush=True)
+            events.append(p)
+        elif t == "scan_done":
+            print("[*] scan done", flush=True)
+
+    script = session.create_script(JS)
+    script.on("message", on_message)
+    script.load()
+    print("[*] 主JS 已装载(resume前), 加载 bypass + resume", flush=True)
+    session.create_script(
+        (RE / "evidence/scripts/bypass_msaoaid_maps_art_callsite.js").read_text()
+    ).load()
+    session.create_script(
+        (RE / "evidence/scripts/mask_frida_maps_only.js").read_text()
+    ).load()
+    device.resume(pid)
+    time.sleep(11)
+    session.create_script(
+        (RE / "evidence/scripts/patch_guard_block_termination.js").read_text()
+    ).load()
+    print("[*] 已 resume, dump 完成即 pkill", flush=True)
+    try:
+        while True:
+            time.sleep(5)
+    except KeyboardInterrupt:
+        pass
+    print(f"[*] 结束, {len(events)} 条 -> {OUT}", flush=True)
+
+
+if __name__ == "__main__":
+    main()