ThreatExpert Report: Trojan Horse, Backdoor.Win32.Agent.tnr, generic!bg.evs, Trojan-Dropper.Agent..

Visit ThreatExpert web site

Close Report

Submission Summary:

Submission details:

Submission received: 11 September 2012, 18:04:25
Processing time: 7 min 35 sec
Submitted sample:

File MD5: 0x02D26CBF766F583EF5EBE23344573ECE
File SHA-1: 0xCA00330A9F1591C2697690B87D1F0540F8621897
Filesize: 52,736 bytes
Alias & packer info:

Trojan Horse [Symantec]
Backdoor.Win32.Agent.tnr [Kaspersky Lab]
generic!bg.evs [McAfee]
Trojan-Dropper.Agent [Ikarus]
Dropper/Agent.87552.G [AhnLab]
packed with: UPX [Kaspersky Lab]

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! Characteristics of the following security risk was identified in the system:

Security Risk	Description
Rootkit.Agent	Rootkit.Agent is a trojan that hijack browser in order to produce popup advertisements from known badsites and also have rootkit functionality in order to hide itself as system driver.

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	%System%\RymttiC.dll	74,752 bytes	MD5: 0xDB6691495C04919E7468E9871D6B6DA1 SHA-1: 0xC16C7A15205DA26D581CD9E35F1B828427335D29	Backdoor.Trojan [Symantec] Backdoor.Win32.Agent.ajbw [Kaspersky Lab] BackDoor-CKB.gen.ap [McAfee] Troj/Bckdr-QWZ [Sophos] Backdoor:Win32/PcClient.ZL [Microsoft] Backdoor.Win32.Venik [Ikarus] Win-Trojan/Agent.74752.AN [AhnLab]
2	[file and pathname of the sample #1]	52,736 bytes	MD5: 0x02D26CBF766F583EF5EBE23344573ECE SHA-1: 0xCA00330A9F1591C2697690B87D1F0540F8621897	Trojan Horse [Symantec] Backdoor.Win32.Agent.tnr [Kaspersky Lab] generic!bg.evs [McAfee] Trojan-Dropper.Agent [Ikarus] Dropper/Agent.87552.G [AhnLab] packed with UPX [Kaspersky Lab]

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]	106,496 bytes

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

Module Name	Module Filename	Address Space Details
rymttic.dll	%System%\rymttic.dll	Process name: svchost.exe Process filename: %System%\svchost.exe Address space: 0x5A0000 - 0x5B7000

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%\RymttiC.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 stoped."

[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%\RymttiC.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 stoped."

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 Names were requested from a host database:

192.5.5.241
xlgzshi.vicp.net

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

Remote Host	Port Number
xlgzshi.vicp.net	2013

Outbound traffic (potentially malicious)

There was an outbound traffic produced on port 2013:

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.