Win32.Troj.DownLoader.se.1367552

这是一个下载者木马，运行后会从指定网址下载一个病毒列表的文本，然后对照该文本中的网址下载木马并运行。经毒霸反病毒专家跟踪分析，被下载的木马是一个远程控制软件，假如该软件被安装并运行，黑客可以完全控制用户的电脑。

该木马运行后，读取资源，释放文件到%systemRoot%\system\1sass.exe，调用cmd启动该文件。然后创建一个批处理文件删除自身。

1sass.exe行为分析
将自身注册为系统服务，并以服务的方式启动
添加的相关注册表项为：
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_DRIVERS_MANAGEMENT\0000]
"Service"="DriversManagement"
"Legacy"=dword:00000001
"ConfigFlags"=dword:00000000
"Class"="LegacyDriver"
"ClassGUID"="{8ECC055D-047F-11D1-A537-0000F8753ED1}"
"DeviceDesc"="ManageDriversinstalled"

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_DRIVERS_MANAGEMENT\0000\Control]
"*NewlyCreated*"=dword:00000000
"ActiveService"="DriversManagement"

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\DriversManagement]
"Type"=dword:00000110
"Start"=dword:00000002
"ErrorControl"=dword:00000000
"ImagePath"=hex(2):43,00,3a,00,5c,00,57,00,49,00,4e,00,44,00,4f,00,57,00,53,00,\
5c,00,73,00,79,00,73,00,74,00,65,00,6d,00,5c,00,31,00,73,00,61,00,73,00,73,\
00,2e,00,65,00,78,00,65,00,00,00
"DisplayName"="ManageDriversinstalled"
"ObjectName"="LocalSystem"

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\DriversManagement\Security]
"Security"=hex:01,00,14,80,90,00,00,00,9c,00,00,00,14,00,00,00,30,00,00,00,02,\
00,1c,00,01,00,00,00,02,80,14,00,ff,01,0f,00,01,01,00,00,00,00,00,01,00,00,\
00,00,02,00,60,00,04,00,00,00,00,00,14,00,fd,01,02,00,01,01,00,00,00,00,00,\
05,12,00,00,00,00,00,18,00,ff,01,0f,00,01,02,00,00,00,00,00,05,20,00,00,00,\
20,02,00,00,00,00,14,00,8d,01,02,00,01,01,00,00,00,00,00,05,0b,00,00,00,00,\
00,18,00,fd,01,02,00,01,02,00,00,00,00,00,05,20,00,00,00,23,02,00,00,01,01,\
00,00,00,00,00,05,12,00,00,00,01,01,00,00,00,00,00,05,12,00,00,00

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\DriversManagement\Enum]
"0"="Root\\LEGACY_DRIVERS_MANAGEMENT\\0000"
"Count"=dword:00000001
"NextInstance"=dword:00000001

该服务启动后首先会连接黑客网站http://nb.******.com/list.txt下载一个病毒列表的文本文件,
然后根据该列表中的网址下载其他的木马并运行，分析其下载的文件，发现为一个远程控制软件。