ThreatExpert Report: Packed.Win32.Tdss.w, Trojan.Win32.Alureon, Trojan:Win32/Alureon.gen!J..

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Submission Summary:

Submission details:

Submission received: 8 July 2009, 23:56:00
Processing time: 6 min 1 sec
Submitted sample:

File MD5: 0x8254D797DC12ADAA7E50F30128199B17
File SHA-1: 0xC4271A82C3EB84B40B3BE9BFD282DE0DB0E8D28F
Filesize: 93,106 bytes
Alias:

Packed.Win32.Tdss.w [Kaspersky Lab]
Trojan.Win32.Alureon [Ikarus]

Summary of the findings:

What's been found	Severity Level
Contains characteristics of an identified security risk.

Technical Details:

Possible Security Risk

Attention! Characteristics of the following security risks were identified in the system:

Security Risk	Description
Trojan.TDSServ	Trojan.TDSServ is a trojan horse that may represent security risk for the compromised system and/or its network environment. The program uses rootkit-specific techniques designed to hide the software presence in the system. This trojan also blocks user access to security website such as pctools.com.
Backdoor.Tidserv!sd6	Backdoor.Tidserv!sd6 is a malicious application that runs in the background and allows remote access to your system, giving the attacker full control of your system.

Attention! The following threat categories were identified:

Threat Category	Description
	A malicious trojan horse or bot that may represent security risk for the compromised system and/or its network environment
	A malicious backdoor trojan that runs in the background and allows remote access to the compromised system

File System Modifications

The following files were created in the system:

#	Filename(s)	File Size	File Hash	Alias
1	%Temp%\Mediacodec.exe	38,912 bytes	MD5: 0x72EDE7E934E0777120EC95FA229F0A2A SHA-1: 0x560C3BB2EB9A2A52C1955D3CCF70EDF06670F998	Packed.Win32.Tdss.w [Kaspersky Lab] Trojan:Win32/Alureon.gen!J [Microsoft]
2	%Temp%\tmp4.tmp	26,624 bytes	MD5: 0x54E93C5BDB57B1C1BC4907813175AB83 SHA-1: 0xBE001441CC6AAED75A1E7A0453D23BF0E4A40360	Suspicious.Vundo.2 [Symantec] Packed.Win32.Tdss.w [Kaspersky Lab] Trojan:Win32/Alureon.BH [Microsoft]
3	%Temp%\tmp5.tmp	343,040 bytes	MD5: 0x03B8A99F177D12D9745F4D7A14FCEA79 SHA-1: 0xB8043C5612A6E08ADA04D3C31DDED5DF7B6AB5C6	Backdoor.Tidserv!sd6 [PCTools] Backdoor.Tidserv [Symantec] Trojan.Win32.Patched.go [Kaspersky Lab] DNSChanger!q [McAfee] W32/Autorun-AFM [Sophos] Trojan:Win32/Alureon.BP [Microsoft] Win-Trojan/DNSChanger.343040 [AhnLab]
4	%Programs%\Mediacodec\Uninstall.lnk	713 bytes	MD5: 0xA3AF0243A4F44CE5ACA89DF426B87E34 SHA-1: 0x8E950F664BD8E75A9C33424F0B82262E9DCCB598	(not available)
5	%ProgramFiles%\Mediacodec\Uninstall.exe	62,821 bytes	MD5: 0x969093CB0B368BD4452C66D58C1C1D59 SHA-1: 0xA48650AAEB8A23613A9EB5260FCED566D38B4842	Trojan.Win32.Alureon [Ikarus]
6	%Windir%\pchealth\ERRORREP\UserDumps\spoolsv.exe.20090709-075705-00.hdmp	2,497,508 bytes	MD5: 0x65CC7C366AA65D9C8B9E4B042486D99A SHA-1: 0x0C255AC01927565CA902B5683AC2B6EE3FB59B82	(not available)
7	%Windir%\pchealth\ERRORREP\UserDumps\spoolsv.exe.20090709-075705-00.mdmp	51,199 bytes	MD5: 0xF1A2602774AE2FF0040EBC7EAEEB9EFB SHA-1: 0x5C8447EF9CD0CDFA621B084570B129610EAC1713	(not available)
8	[file and pathname of the sample #1]	93,106 bytes	MD5: 0x8254D797DC12ADAA7E50F30128199B17 SHA-1: 0xC4271A82C3EB84B40B3BE9BFD282DE0DB0E8D28F	Packed.Win32.Tdss.w [Kaspersky Lab] Trojan.Win32.Alureon [Ikarus]

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).
%Programs% is a variable that refers to the file system directory that contains the user's program groups. A typical path is C:\Documents and Settings\[UserName]\Start Menu\Programs.
%ProgramFiles% is a variable that refers to the Program Files folder. A typical path is C:\Program Files.
%Windir% is a variable that refers to the Windows installation folder. By default, this is C:\Windows or C:\Winnt.

The following directories were created:

%Windir%\pchealth\ERRORREP\UserDumps
%Programs%\Mediacodec
%ProgramFiles%\Mediacodec

Memory Modifications

There were new processes created in the system:

Process Name	Process Filename	Main Module Size
Mediacodec.exe	%Temp%\Mediacodec.exe	94,208 bytes
[filename of the sample #1]	[file and pathname of the sample #1]	3,883,008 bytes

The following system service was modified:

Service Name	Display Name	New Status	Service Filename
Spooler	Print Spooler	"Stopped"	%System%\spoolsv.exe

Notes:

%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).

Registry Modifications

The following Registry Keys were created:

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\videoshow
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\videoshow\CLSID
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\PCHealth\ErrorReporting\UserFaults
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Mediacodec
HKEY_CURRENT_USER\Software\Mediacodec

The newly created Registry Values are:

[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\videoshow\CLSID]

(Default) = "{6BF52A52-394A-11D3-B153-00C04F79FAA6}"

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\PCHealth\ErrorReporting\UserFaults]

%Windir%\PCHealth\ErrorRep\UserDumps\spoolsv.exe.20090709-075705-00.mdmp = DA 00 00 00 60 00 00 00 60 00 00 00 A0 00 00 00 5F 1D 00 00 00 00 00 00 05 00 01 00 28 0A 84 08 00 00 00 00 00 00 00 00 00 00 00 00 D9 07 07 00 04 00 09 00 07 00 39 00 05 00 D7 03 30 00 30 00 05 00 00 C0 31 00 38 00 00 00 00 00 00 00 00 00 B4 7E 10 4

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

UserFaultCheck = "%System%\dumprep 0 -u"

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Mediacodec]

UninstallString = ""%ProgramFiles%\Mediacodec\Uninstall.exe""
InstallLocation = "%ProgramFiles%\Mediacodec"
DisplayName = "Mediacodec"
DisplayIcon = "%ProgramFiles%\Mediacodec\Uninstall.exe,0"

[HKEY_CURRENT_USER\Software\Mediacodec]

(Default) = "%ProgramFiles%\Mediacodec"

The following Registry Values were modified:

[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\ServiceCurrent]

(Default) = 0x0000000C

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\ServiceCurrent]

(Default) = 0x0000000C

Other details

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

Remote Host	Port Number
213.163.66.241	80

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