ThreatExpert Report: Trojan.Adclicker, Mal/Emogen-Y

Visit ThreatExpert web site

Close Report

Submission Summary:

Submission details:

Submission received: 27 May 2009, 18:47:27
Processing time: 7 min 2 sec
Submitted sample:

File MD5: 0x9B5A63FDA797BF1739F24A114B6E7419
File SHA-1: 0x867E887EBD62DA411844E8575360FA6F9D68A60C
Filesize: 240,640 bytes
Alias & packer info:

Trojan.Adclicker [Symantec]
Mal/Emogen-Y [Sophos]
packed with: PE_Patch.UPX [Kaspersky Lab]

Summary of the findings:

What's been found	Severity Level
Downloads/requests other files from Internet.
Contains characteristics of an identified security risk.

Technical Details:

Possible Security Risk

Attention! The following threat category was identified:

Threat Category	Description
	A malicious trojan horse or bot that may represent security risk for the compromised system and/or its network environment

File System Modifications

The following files were created in the system:

#	Filename(s)	File Size	File Hash	Alias
1	%Windir%\dhcp\svchost.exe [file and pathname of the sample #1]	240,640 bytes	MD5: 0x9B5A63FDA797BF1739F24A114B6E7419 SHA-1: 0x867E887EBD62DA411844E8575360FA6F9D68A60C	Trojan.Adclicker [Symantec] Mal/Emogen-Y [Sophos] packed with PE_Patch.UPX [Kaspersky Lab]
2	%System%\[filename of the sample #1 without extension].bat	120 bytes	MD5: 0xAB7411F18E91B1C49430F4D99C0FDE52 SHA-1: 0xF268C0D52DCEF744259EC1A36622F5C2619FABBE	(not available)

Notes:

%Windir% is a variable that refers to the Windows installation folder. By default, this is C:\Windows or C:\Winnt.
%System% is a variable that refers to the System folder. By default, this is C:\Windows\System (Windows 95/98/Me), C:\Winnt\System32 (Windows NT/2000), or C:\Windows\System32 (Windows XP).

The following directory was created:

%Windir%\dhcp

Memory Modifications

There were new processes created in the system:

Process Name	Process Filename	Main Module Size
svchost.exe	%Windir%\dhcp\svchost.exe	675,840 bytes
[filename of the sample #1]	[file and pathname of the sample #1]	675,840 bytes

There was a new service created in the system:

Service Name	Display Name	Status	Service Filename
DhcpSrv	Dhcp server	"Running"	%Windir%\dhcp\svchost.exe

Registry Modifications

The following Registry Keys were created:

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Enum\Root\LEGACY_DHCPSRV
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Enum\Root\LEGACY_DHCPSRV\0000
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Enum\Root\LEGACY_DHCPSRV\0000\Control
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\DhcpSrv
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\DhcpSrv\Security
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\DhcpSrv\Enum
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_DHCPSRV
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_DHCPSRV\0000
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_DHCPSRV\0000\Control
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\DhcpSrv
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\DhcpSrv\Security
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\DhcpSrv\Enum

The newly created Registry Values are:

[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Enum\Root\LEGACY_DHCPSRV\0000\Control]

*NewlyCreated* = 0x00000000
ActiveService = "DhcpSrv"

[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Enum\Root\LEGACY_DHCPSRV\0000]

Service = "DhcpSrv"
Legacy = 0x00000001
ConfigFlags = 0x00000000
Class = "LegacyDriver"
ClassGUID = "{8ECC055D-047F-11D1-A537-0000F8753ED1}"
DeviceDesc = "Dhcp server"

[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Enum\Root\LEGACY_DHCPSRV]

NextInstance = 0x00000001

[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\DhcpSrv\Enum]

0 = "Root\LEGACY_DHCPSRV\0000"
Count = 0x00000001
NextInstance = 0x00000001

[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\DhcpSrv\Security]

Security = 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 0

[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\DhcpSrv]

Type = 0x00000110
Start = 0x00000002
ErrorControl = 0x00000001
ImagePath = "%Windir%\dhcp\svchost.exe"
DisplayName = "Dhcp server"
ObjectName = "LocalSystem"
Description = "Manages network configuration by registering and updating IP addresses Services and DNS names services."

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_DHCPSRV\0000\Control]

*NewlyCreated* = 0x00000000
ActiveService = "DhcpSrv"

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_DHCPSRV\0000]

Service = "DhcpSrv"
Legacy = 0x00000001
ConfigFlags = 0x00000000
Class = "LegacyDriver"
ClassGUID = "{8ECC055D-047F-11D1-A537-0000F8753ED1}"
DeviceDesc = "Dhcp server"

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_DHCPSRV]

NextInstance = 0x00000001

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\DhcpSrv\Enum]

0 = "Root\LEGACY_DHCPSRV\0000"
Count = 0x00000001
NextInstance = 0x00000001

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\DhcpSrv\Security]

Security = 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 0

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\DhcpSrv]

Type = 0x00000110
Start = 0x00000002
ErrorControl = 0x00000001
ImagePath = "%Windir%\dhcp\svchost.exe"
DisplayName = "Dhcp server"
ObjectName = "LocalSystem"
Description = "Manages network configuration by registering and updating IP addresses Services and DNS names services."

[HKEY_USERS\.DEFAULT\Software\Microsoft\Internet Explorer\Main]

NotifyDownloadComplete = "yes"

[HKEY_USERS\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings]

ProxyEnable = 0x00000000

The following Registry Value was deleted:

[HKEY_USERS\.DEFAULT\AppEvents\Schemes\Apps\Explorer\Navigating\.Current]

(Default) = "%SystemRoot%\media\Windows XP Start.wav"

The following Registry Values were modified:

[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\ServiceCurrent]

(Default) = 0x0000000C

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\ServiceCurrent]

(Default) = 0x0000000C

[HKEY_USERS\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]

Cookies = "%Profiles%\LocalService\Cookies"
Local AppData = "%Profiles%\LocalService\Local Settings\Application Data"
History = "%Profiles%\LocalService\Local Settings\History"

[HKEY_USERS\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3]

1601 = 0x00000000

Other details

To mark the presence in the system, the following Mutex object was created:

CritOpMutex

The following Internet Connection was established:

Server Name	Server Port	Connect as User	Connection Password
ask.ipk8888.cn	80	(null)	(null)

The following GET requests were made:

count/count.asp?mac=00-00-00-00-00-00&ver=20090525
count/index.jpg
xy0525.asp

All content ("Information") contained in this report is the copyrighted work of Threat Expert Ltd and its associated companies ("ThreatExpert") and may not be copied without the express permission of ThreatExpert.

The Information is provided on an "as is" basis. ThreatExpert disclaims all warranties, whether express or implied, to the maximum extent permitted by law, including the implied warranties that the Information is merchantable, of satisfactory quality, accurate, fit for a particular purpose or need, or non-infringing, unless such implied warranties are legally incapable of exclusion. Further, ThreatExpert does not warrant or make any representations regarding the use or the results of the use of the Information in terms of their correctness, accuracy, reliability, or otherwise.