ThreatExpert Report

Submission Summary:

Submission details:

Submission received: 8 February 2010, 13:21:32
Processing time: 5 min 56 sec
Submitted sample:

File MD5: 0x911993C5B869BBCA31795C620CECBE20
File SHA-1: 0x47BB2B5D9CD711C8747A7FB35F00BD6F0661C259
Filesize: 45,568 bytes

Summary of the findings:

What's been found	Severity Level
Creates a startup registry entry.

Technical Details:

File System Modifications

The following files were created in the system:

#	Filename(s)	File Size	File Hash
1	%Windir%\dxxdv34567.bat	173 bytes	MD5: 0x472E0C337DEC6707E44CA359AD2355C3 SHA-1: 0x49CBE52F26DAC9D20F7D59D9DC8C6847DC33430F
2	%Windir%\ld16.exe [file and pathname of the sample #1]	45,568 bytes	MD5: 0x911993C5B869BBCA31795C620CECBE20 SHA-1: 0x47BB2B5D9CD711C8747A7FB35F00BD6F0661C259

Note:

%Windir% is a variable that refers to the Windows installation folder. By default, this is C:\Windows or C:\Winnt.

Memory Modifications

There were new processes created in the system:

Process Name	Process Filename	Main Module Size
ld16.exe	%Windir%\ld16.exe	57,344 bytes
[filename of the sample #1]	[file and pathname of the sample #1]	57,344 bytes

Registry Modifications

The following Registry Keys were deleted:

HKEY_CURRENT_USER\AppEvents\Schemes\Apps\Explorer\Navigating
HKEY_CURRENT_USER\AppEvents\Schemes\Apps\Explorer\Navigating\.Current
HKEY_CURRENT_USER\AppEvents\Schemes\Apps\Explorer\Navigating\.Default

The newly created Registry Value is:

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]

sysldtray = "%Windir%\ld16.exe"

so that ld16.exe runs every time Windows starts

The following Registry Values were deleted:

[HKEY_CURRENT_USER\AppEvents\Schemes\Apps\Explorer\Navigating\.Default]

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

[HKEY_CURRENT_USER\AppEvents\Schemes\Apps\Explorer\Navigating\.Current]

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

[HKEY_CURRENT_USER\AppEvents\Schemes\Apps\Explorer\Navigating]

(Default) = ""

Other details

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

xx464dg433xx16

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