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无处不在的监控: Hacking Team:WP8 监控代码分析

原文来自乌云，备份地址

0x00 背景

最近Hacking Team被黑客入侵,近400GB的资料泄漏,在安全界炒的沸沸扬扬.其中泄漏的资料包括:源代码，0day，资料入侵项目相关信息，相关的账户密码，数据及音像资料，办公文档，邮件及图片。
Hacking Team在意大利米兰注册了一家软件公司，主要销售入侵及监视功能的软件。其远程控制系统可以监测互联网用户的通讯，解密用户的加密，文件及电子邮件，记录各种通信信息，也可以远程激活用户的麦克风及摄像头。其产品在几十个国家使用
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在源代码中有各个操作系统平台的远程控制软件源码,RCS（Remote Control System）。经过我们的分析，发现其监控内容不可谓不详尽。Android,blackberry，ios，windows，window phone，symbian均有与之对应的监控代码。
在源码中，rcs为前缀的源码文件是其远控功能，包括代理 控制 监控数据库 隐藏ip 等，而针对特定平台架构的是以core前缀命名。其中和相关window phone监控代码在core-winphone-master.zip文件中。其主要用于实时手机系统的系统状态信息如（电池状态，设备信息，GPS地址位置），联系人，短信记录，日历日程安排，照片；同时还能录音，截取手机屏幕，开启摄像头，话筒等功能，由此可见监控信息的详细程度令人害怕。
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0x01 WP8监控源码分析

core-winphone-master\MornellaWp8\MornellaWp8下是其主要核心代码,主要文件如下:
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通过观察源码流程图可以看出,整个监控项目源码的逻辑还是比较复杂的,但是深入之后,发现其还是设计的比较巧妙
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0x01-1 程序框架分析

1.项目主要分为3大块Modules,Events,Actions,主要的功能Modules核心监控代码在此处,Event等待监控事件的到来并调用对应的监控模块,Action主要负责一些行为的启动和停止
程序启动流程如下:
main->mornellaStart->BTC_Init->CoreProc->Core->Task
setLoadLibraryExW分支主要负责加载一些API函数的地址,做一些初始化工作
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最后Task创建了3大模块的管理对象ModulesManager,EventsManager,ActionsManager
并在Task::TaskInit()中启动了events
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0x01-2 Event模块分析

Event主要负责以下事件的监控,例如短信,日历日程安排,联系人,地址位置,电池状态,进程信息,计时器状态等信息
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所有的event均以json格式发送,并调用conf.cpp下的ParseEvent进行解析,源码部分逻辑被注释上了,经过搜索发现被注释上的功能最后没有相关的实现代码.
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我们选择电池状态监控为例,在OnBatteryLevel函数中,首先通过RefreshBatteryStatus刷新了电池的状态,deviceObj->GetBatteryStatus()得到当前的电池状态,最后me->triggerStart()添加到ActionManage中的Action队列中
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0x01-3 Action模块分析

Action模块主要是3个类 ActionManage,Action,SubAction其中ActionManage主要维护一个Action队列,Action是抽象的接口,而执行的实体主要是SubAction。
SubAction主要处理synchronize,execute,uninstall,module,event,sms,log,destroy等行为的执行
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而在处理module时用了start类进行启动,Start首先初始化了一个ModulesManager对象,然后在调用conf对获取对应的module信息,并调用ModulesManager->start()启动对应的模块。
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0x01-4 Module模块分析

Module模块同上面的模块结构保持一致，也是一个ModuleManage负责维护一个Modules队列。
进行外层调度，Module类是一个抽象的接口，负责统一调用接口,主要的模块接口如下.
这些模块,完成了获取设备信息(如:操作系统版本,设备ID,电量,应用程序列表,进程列表,可用磁盘空间,内存信息,处理器架构),联系人,一些社交帐号信息,同时还能开启摄像头,话筒,截取手机屏幕等功能
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1.获取的设备信息,代码主要在DeviceInfo.cpp中
enter image description here
2.获取联系人的以及社交网站的帐号密码,代码主要在PoomAddressBook.cpp中
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3.日历日程安排,代码主要在PoomCalendar.cpp中
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4.截图功能(代码在SnapshotGrabber.cpp中,但是该部分代码已经被注释)
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5.开启摄像头(代码在NativePhotoCaptureInterface.cpp中)
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其主要通过WP的PhotoCaptureDevice API接口来实现,当你在啪啪啪的时候,你的摄像头被开启,那是种什么样的感觉呢?
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其他的一些监控行为就不一一叙述了,大多都可以通过调用WP的接口来实现。

0x02 感染途径

Window在新推出的WP8上做了很多对非越狱用户的保护,只能安装应用商店中的软件,但是WP8可以通过一个链接访问应用商店中的某个APP,当被攻击者被欺骗的安装了该APP应用,该APP遍可以通过WP提权的漏洞来提升运行权限,即可执行高权限代码,带来的后果非常严重,所以我们要警惕一些钓鱼欺诈的应用。
而对于越狱用户,别人可以直接把应用捆绑在越狱工具,在越狱的过程中,即可捆绑安装他们的APP应用,如果这个应用是恶意的,那么后果可想而知,然而在越狱后的WP系统安全性也将大打折扣.所以我们最好不要轻易的越狱。
Hacking Team是拥有微软的企业证书的,而具有企业证书的公司可以将自己的应用提交到商店供人下载,不用授权即可安装,不论是否越狱都可以安装上去,然而从应用商店下载的程序,用户一般都会认为是安全的。
由于Window Phone用户较少,反馈的问题可能也比较少,相关的开发维护人员也相应的比较少,可能会存在一些不为人知的安全漏洞,可以突破Window Phone8的安全限制,将恶意程序安装上去,还可能存在某些已经安装的应用存在漏洞,利用这些具有漏洞应用结合提权漏洞,将恶意的应用安装到设备上。

0x03 小结

通过Hacking Team泄漏的这些资料来看,Hacking Team团队还是具备非常专业的水平,但是强如Hacking Team的公司都被入侵了,你手机里面的那些私密照片还保险么?
建议:
1.不要随意安装不知名的应用
2.及时更新系统的安全补丁
3.社交帐号设置复杂的密码
4.给私密的照片加密
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