ThreatExpert Report: TrojanDownloader:Win32/Small.gen!BL, Virus.Win32.Patched, Hacktool.Rootkit

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Submission Summary:

Submission details:

Submission received: 18 September 2012, 20:33:13
Processing time: 9 min 0 sec
Submitted sample:

File MD5: 0x0FA5C1A1D93382DF40F79B18FFD2C6B3
File SHA-1: 0x97A8CD9F98FFF23E3148F31F7E4B4057F8259898
Filesize: 135,168 bytes
Alias & packer info:

TrojanDownloader:Win32/Small.gen!BL [Microsoft]
Virus.Win32.Patched [Ikarus]
packed with: PE_Patch.PseudoSign [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 hacktool that could be used by attackers to break into a system

File System Modifications

The following files were created in the system:

#	Filename(s)	File Size	File Hash	Alias
1	%Temp%\del183a2.bat	166 bytes	MD5: 0x9F039EBF002A6AF19872675CA4A56327 SHA-1: 0xD563F595B151C03374B77B55D9C8BBE19C0E6B1B	(not available)
2	%System%\drivers\mstnortontehew.sys	8,704 bytes	MD5: 0xEE50034944A89502257F4BB42363AEB6 SHA-1: 0x195EDDD06664F439CC81631518088F56A7AFCE83	Hacktool.Rootkit [Symantec]
3	[file and pathname of the sample #1]	135,168 bytes	MD5: 0x0FA5C1A1D93382DF40F79B18FFD2C6B3 SHA-1: 0x97A8CD9F98FFF23E3148F31F7E4B4057F8259898	TrojanDownloader:Win32/Small.gen!BL [Microsoft] Virus.Win32.Patched [Ikarus] packed with PE_Patch.PseudoSign [Kaspersky Lab]

Notes:

%Temp% is a variable that refers to the temporary folder in the short path form. By default, this is C:\Documents and Settings\[UserName]\Local Settings\Temp\ (Windows NT/2000/XP).
%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]	143,360 bytes

Registry Modifications

The following Registry Keys were created:

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Enum\Root\LEGACY_MSTNORTONTEHEW
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Enum\Root\LEGACY_MSTNORTONTEHEW\0000
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Enum\Root\LEGACY_MSTNORTONTEHEW\0000\Control
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\mstnortontehew
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\mstnortontehew\Security
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\mstnortontehew\Enum
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_MSTNORTONTEHEW
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_MSTNORTONTEHEW\0000
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_MSTNORTONTEHEW\0000\Control
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\mstnortontehew
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\mstnortontehew\Security
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\mstnortontehew\Enum

The newly created Registry Values are:

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

*NewlyCreated* = 0x00000000
ActiveService = "mstnortontehew"

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

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

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

NextInstance = 0x00000001

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

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

[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\mstnortontehew\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\mstnortontehew]

Type = 0x00000001
Start = 0x00000003
ErrorControl = 0x00000001
ImagePath = "%System%\drivers\mstnortontehew.sys"
DisplayName = "mstnortontehew"

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

*NewlyCreated* = 0x00000000
ActiveService = "mstnortontehew"

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

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

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

NextInstance = 0x00000001

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

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

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\mstnortontehew\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\mstnortontehew]

Type = 0x00000001
Start = 0x00000003
ErrorControl = 0x00000001
ImagePath = "%System%\drivers\mstnortontehew.sys"
DisplayName = "mstnortontehew"

Other details

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

	Republic of Korea
	China

The data identified by the following URL was then requested from the remote web server:

http://www.gunibox.com/bgm/mojwe.gif

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