ThreatExpert Report: Trojan-Downloader.Win32.VB.oqt, Downloader.Trojan, Generic Downloader.s..

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Submission Summary:

Submission details:

Submission received: 15 July 2009, 14:34:21
Processing time: 5 min 41 sec
Submitted sample:

File MD5: 0x664CB28EF710E35DC5B7539EB633ABCA
File SHA-1: 0x7B9BA0E08E59A798CEB555DBABB4A91F19952629
Filesize: 28,672 bytes
Alias:

Downloader.Trojan [Symantec]
Trojan-Downloader.Win32.VB.oqt [Kaspersky Lab]
Generic Downloader.s [McAfee]
Troj/Dloadr-CPD [Sophos]
TrojanDownloader:Win32/VB.LI [Microsoft]
Trojan-Downloader.Win32.Adload [Ikarus]
Win-Trojan/Downloader.28672.PF [AhnLab]

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 categories were identified:

Threat Category	Description
	A program that downloads files to the local computer that may represent security risk
	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 file was created in the system:

#	Filename(s)	File Size	File Hash	Alias
1	[file and pathname of the sample #1]	28,672 bytes	MD5: 0x664CB28EF710E35DC5B7539EB633ABCA SHA-1: 0x7B9BA0E08E59A798CEB555DBABB4A91F19952629	Downloader.Trojan [Symantec] Trojan-Downloader.Win32.VB.oqt [Kaspersky Lab] Generic Downloader.s [McAfee] Troj/Dloadr-CPD [Sophos] TrojanDownloader:Win32/VB.LI [Microsoft] Trojan-Downloader.Win32.Adload [Ikarus] Win-Trojan/Downloader.28672.PF [AhnLab]

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]	28,672 bytes

Other details

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

Spain

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

_!SHMSFTHISTORY!_

The following Internet Connection was established:

Server Name	Server Port	Connect as User	Connection Password
musica.uol.com.br	80	(null)	(null)

The following GET requests were made:

ultnot/2009/06/25/michael-jackson.jhtm
ultnot/2009/06/25/index.jpg

The following Internet downloads were started (the retrieved bits are saved into the local file):

URL to be downloaded	Filename for the downloaded bits
http://www.anella2009.dominiotemporario.com/ba/foto.dll	%Windir%\Dynamic.dll
http://www.anella2009.dominiotemporario.com/ba/michael.gif	%System%\fotos.exe
http://www.anella2009.dominiotemporario.com/ba/kproces.gif	%System%\kproces.exe

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).

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