ThreatExpert Report: Net-Worm.Win32.Koobface.bqy, Generic.dx!fkk, W32/Sedjjak-A..

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Submission Summary:

Submission details:

Submission received: 22 October 2009, 22:54:04
Processing time: 5 min 18 sec
Submitted sample:

File MD5: 0x3A32FBE2B704B6AE36FBD35637B2F46E
File SHA-1: 0xD54B45CE6AD0FD2C4D03BB9C938503FDF1CE9D03
Filesize: 77,312 bytes
Alias:

Net-Worm.Win32.Koobface.bqy [Kaspersky Lab]
Generic.dx!fkk [McAfee]
W32/Sedjjak-A [Sophos]
Net-Worm.Win32.Koobface [Ikarus]

Summary of the findings:

What's been found	Severity Level
Downloads/requests other files from Internet.
Creates a startup registry entry.
Contains characteristics of an identified security risk.

Technical Details:

Possible Security Risk

Attention! The following threat category was identified:

Threat Category	Description
	A network-aware worm that attempts to replicate across the existing network(s)

File System Modifications

The following files were created in the system:

#	Filename(s)	File Size	File Hash	Alias
1	%Windir%\dxxdv34567.bat	173 bytes	MD5: 0x472E0C337DEC6707E44CA359AD2355C3 SHA-1: 0x49CBE52F26DAC9D20F7D59D9DC8C6847DC33430F	(not available)
2	%Windir%\ld14.exe [file and pathname of the sample #1]	77,312 bytes	MD5: 0x3A32FBE2B704B6AE36FBD35637B2F46E SHA-1: 0xD54B45CE6AD0FD2C4D03BB9C938503FDF1CE9D03	Net-Worm.Win32.Koobface.bqy [Kaspersky Lab] Generic.dx!fkk [McAfee] W32/Sedjjak-A [Sophos] Net-Worm.Win32.Koobface [Ikarus]

Note:

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

Memory Modifications

There was a new process created in the system:

Process Name	Process Filename	Main Module Size
ld14.exe	%Windir%\ld14.exe	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 Values are:

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

sysldtray = "%Windir%\ld14.exe"

so that ld14.exe runs every time Windows starts

[HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main]

tp = "1234"

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

The following port was open in the system:

Port	Protocol	Process
1056	TCP	ld14.exe (%Windir%\ld14.exe)

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

Remote Host	Port Number
80.253.225.12	80

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

http://zu.ktk.ru/.sys/?action=ldgen&v=14
http://zu.ktk.ru/.sys/?action=ldgen&a=13441600&v=14&l=1234&c_fb=0&c_ms=0&c_hi=0&c_tw=0&c_be=0&c_tg=0&c_nl=0&os=5.1

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