ThreatExpert Report: Trojan.Gen, Backdoor.Win32.Nbdd.aaz, Generic BackDoor!1i3..

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Submission Summary:

Submission details:

Submission received: 2 August 2012, 22:58:10
Processing time: 8 min 37 sec
Submitted sample:

File MD5: 0xFE8FE66B3FD62C41AB7AF431E7699FBA
File SHA-1: 0xB27BB089666D9D2115E8FC3EE4F108924728D86E
Filesize: 95,232 bytes
Alias:

Trojan.Gen [Symantec]
Backdoor.Win32.Nbdd.aaz [Kaspersky Lab]
Generic BackDoor!1i3 [McAfee]
Backdoor:Win32/PcClient.ZL [Microsoft]
Backdoor.Win32.Venik [Ikarus]

Summary of the findings:

What's been found	Severity Level
Produces outbound traffic.
Contains characteristics of an identified security risk.

Technical Details:

Possible Security Risk

Attention! The following threat categories were identified:

Threat Category	Description
	A malicious backdoor trojan that runs in the background and allows remote access to the compromised system
	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	[file and pathname of the sample #1]	95,232 bytes	MD5: 0xFE8FE66B3FD62C41AB7AF431E7699FBA SHA-1: 0xB27BB089666D9D2115E8FC3EE4F108924728D86E	Trojan.Gen [Symantec] Backdoor.Win32.Nbdd.aaz [Kaspersky Lab] Generic BackDoor!1i3 [McAfee] Backdoor:Win32/PcClient.ZL [Microsoft] Backdoor.Win32.Venik [Ikarus]
2	%System%\Wqujsulw.dll	69,632 bytes	MD5: 0x1C35F2F7ADE392AAEA27D5B3C35FADC6 SHA-1: 0x89891BFEBB12984BEB620B60A56143C3DDE37511	Backdoor.Trojan [Symantec] Backdoor.Win32.Nbdd.aaz [Kaspersky Lab] Generic BackDoor!1jj [McAfee] Troj/Agent-RSS [Sophos] Backdoor:Win32/PcClient.ZL [Microsoft] Backdoor.Win32.Venik [Ikarus] Win-Trojan/Xema.variant [AhnLab]

Note:

%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).

Memory Modifications

There was a new process created in the system:

Process Name	Process Filename	Main Module Size
[filename of the sample #1]	[file and pathname of the sample #1]	102,400 bytes

The following module was loaded into the address space of other process(es):

Module Name	Module Filename	Address Space Details
wqujsulw.dll	%System%\wqujsulw.dll	Process name: svchost.exe Process filename: %System%\svchost.exe Address space: 0x5A0000 - 0x5B3000

There was a new service created in the system:

Service Name	Display Name	Status	Service Filename
MediaCenter	MS Media Control Center	"Running"	%System%\svchost.exe -k krnlsrvc

Registry Modifications

The following Registry Keys were created:

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\MediaResources\msvideo
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Enum\Root\LEGACY_MEDIACENTER
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Enum\Root\LEGACY_MEDIACENTER\0000
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Enum\Root\LEGACY_MEDIACENTER\0000\Control
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\MediaCenter
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\MediaCenter\Parameters
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\MediaCenter\Security
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\MediaCenter\Enum
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\MediaResources\msvideo
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_MEDIACENTER
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_MEDIACENTER\0000
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_MEDIACENTER\0000\Control
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MediaCenter
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MediaCenter\Parameters
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MediaCenter\Security
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MediaCenter\Enum

The newly created Registry Values are:

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\SvcHost]

krnlsrvc = 4D 65 64 69 61 43 65 6E 74 65 72 00

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

*NewlyCreated* = 0x00000000
ActiveService = "MediaCenter"

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

Service = "MediaCenter"
Legacy = 0x00000001
ConfigFlags = 0x00000000
Class = "LegacyDriver"
ClassGUID = "{8ECC055D-047F-11D1-A537-0000F8753ED1}"
DeviceDesc = "MS Media Control Center"

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

NextInstance = 0x00000001

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

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

[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\MediaCenter\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\MediaCenter\Parameters]

ServiceDll = "%System%\Wqujsulw.dll"

[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\MediaCenter]

Type = 0x00000010
Start = 0x00000002
ErrorControl = 0x00000000
ImagePath = "%System%\svchost.exe -k krnlsrvc"
DisplayName = "MS Media Control Center"
ObjectName = "LocalSystem"
Description = "Provides support for media palyer. This service can't be stoper."

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

*NewlyCreated* = 0x00000000
ActiveService = "MediaCenter"

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

Service = "MediaCenter"
Legacy = 0x00000001
ConfigFlags = 0x00000000
Class = "LegacyDriver"
ClassGUID = "{8ECC055D-047F-11D1-A537-0000F8753ED1}"
DeviceDesc = "MS Media Control Center"

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

NextInstance = 0x00000001

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

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

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MediaCenter\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\MediaCenter\Parameters]

ServiceDll = "%System%\Wqujsulw.dll"

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MediaCenter]

Type = 0x00000010
Start = 0x00000002
ErrorControl = 0x00000000
ImagePath = "%System%\svchost.exe -k krnlsrvc"
DisplayName = "MS Media Control Center"
ObjectName = "LocalSystem"
Description = "Provides support for media palyer. This service can't be stoper."

The following Registry Values were modified:

[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\ServiceCurrent]

(Default) =

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\ServiceCurrent]

(Default) =

Other details

Analysis of the file resources indicate the following possible country of origin:

China

The following Host Name was requested from a host database:

a524a.3322.org

There was registered attempt to establish connection with the remote host. The connection details are:

Remote Host	Port Number
a524a.3322.org	8080

Outbound traffic (potentially malicious)

There was an outbound traffic produced on port 8080:

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