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 +1,131 @@
+#!/usr/bin/env python3
+"""扫描内存找加密前的 dfpReport 明文采集数据。
+
+明文 = 设备采集序列化(含 deviceinfo/appid/机型 thyme/M2102J2SC 等)。
+找到后 dump 前后 16KB, 与密文(魔数开头)配对解 keystream。
+"""
+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_plain_big.json")
+
+JS = r"""
+'use strict';
+Process.setExceptionHandler(function(d){ return true; });
+send({type:'armed'});
+
+// 设备特征串 (加密前明文会出现)
+var PATTERNS = [
+  ['thyme', '74 68 79 6d 65'],
+  ['M2102J2SC', '4d 32 31 30 32 4a 32 53 43'],
+  ['deviceinfo', '64 65 76 69 63 65 69 6e 66 6f'],
+  ['appid', '61 70 70 69 64'],
+  ['terminal', '74 65 72 6d 69 6e 61 6c'],
+  ['android-', '61 6e 64 72 6f 69 64 2d'],
+  ['Xiaomi', '58 69 61 6f 6d 69'],
+  ['sdk', '73 64 6b'],
+];
+
+function tryRead(p, n){
+  try{ return p.readByteArray(n); }catch(e){ return null; }
+}
+
+function scan(){
+  var reported = {};
+  try{
+    Process.enumerateRanges('r--').forEach(function(r){
+      if (r.size > 1024*1024*256) return;
+      try{
+        PATTERNS.forEach(function(pat){
+          // 用打头模式避免每次整个段 MB 级扫描太慢: 只对前几个模式做全扫
+          var key = pat[0];
+          if (reported[key] > 20) return;
+          var m = Memory.scanSync(r.base, r.size, pat[1]);
+          if (!m.length) return;
+          reported[key] = (reported[key] || 0) + m.length;
+          m.slice(0, 8).forEach(function(x){
+            var addr = x.address;
+            // dump 前后: 前找结构头, 后 4KB
+            var pre = null, post = null;
+            try{ pre = addr.sub(256).readByteArray(512); }catch(e){}
+            try{ post = addr.readByteArray(4096); }catch(e){}
+            if (post) {
+              var arr = Array.from(new Uint8Array(post));
+              var hex = arr.map(function(b){return ('0'+b.toString(16)).slice(-2);}).join('');
+              send({type:'hit', pat:key, addr:String(addr), hex:hex});
+            }
+          });
+        });
+      }catch(e){}
+    });
+  }catch(e){}
+  send({type:'tick'});
+}
+
+setInterval(function(){ try{ scan(); }catch(e){} }, 5000);
+"""
+
+
+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 == "hit":
+            h = p.get('hex', '')
+            addr = p.get('addr')
+            # 去重: 同地址只留一次
+            if any(e.get('addr') == addr for e in events): return
+            tag = p.get('pat')
+            events.append({"addr": addr, "pat": tag, "hex": h})
+            OUT.write_text(json.dumps(events, ensure_ascii=False))
+            # 打印: 特征串 + 前 64B 明文上下文
+            try:
+                idx = h.encode().decode('hex') if False else h
+            except Exception: pass
+            print(f"[hit:{tag}] @{addr}", flush=True)
+            # 提取特征串前后 3B 看明文结构
+            print(f"    hex[:96]: {h[:96]}", 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, 扫描中 (特征: thyme/M2102J2SC/deviceinfo/appid/android-)", flush=True)
+    try:
+        while True:
+            time.sleep(5)
+    except KeyboardInterrupt:
+        pass
+    print(f"[*] 结束, {len(events)} -> {OUT}", flush=True)
+
+
+if __name__ == "__main__":
+    main()