ThreatExpert Report: Trojan.Win32.VB.hux, Packed.Generic.203, Trojan:Win32/Vundo.gen!R..

Submission Summary:

Submission details:

Submission received: 3 January 2009, 22:49:44
Processing time: 7 min 12 sec
Submitted sample:

File MD5: 0x98964436699F52FF55F9FDEEDBFBB249
File SHA-1: 0x8D58BB0C47EC51C9B9A82BD0386DCB909A58D765
Filesize: 870,912 bytes
Alias: Trojan.Win32.VB.hux [Kaspersky Lab]

Summary of the findings:

What's been found	Severity Level
Threat characteristics of Vundo (aka VirtuMonde/VirtuMundo), a trojan horse that cause popups and advertises rogue antispyware programs. Vundo can be installed by visiting a Web site link contained in a spammed email. It is known to create a DLL file in the Windows system32 directory and inject it into system processes winlogon.exe and explorer.exe.
Hosts file modification that may block access to the security web sites.
Downloads/requests other files from Internet.
Registers a Winlogon notification package so that the installed module is loaded into the address space of winlogon.exe.
Registers a 32-bit in-process server DLL.
Contains characteristics of an identified security risk.

Technical Details:

Possible Security Risk

Attention! Characteristics of the following security risk was identified in the system:

Security Risk	Description
Trojan.Virtumonde	Virtumonde modifies the Windows Internet connection mechanism and display various pop-up advertisements.

Attention! The following threat category was identified:

Threat Category	Description
	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 files were created in the system:

#	Filename(s)	File Size	File Hash	Alias
1	%Temp%\vtUlLDSi.bat	87 bytes	MD5: 0x3085E917A1D8F347C3711EEB1E3216EF SHA-1: 0x979301F413904347AA4168B72F76BFFDB9CA33F6	(not available)
2	%System%\iifGwXoP.dll	37,376 bytes	MD5: 0x99889D68E7B84842C91AC05F183B65EA SHA-1: 0x5323F59DFFFA6EB6FA7BDCCBA8FF0FBC166B942D	Packed.Generic.203 [Symantec] Trojan:Win32/Vundo.gen!R [Microsoft] Trojan.Vundo [Ikarus]
3	[file and pathname of the sample #1]	870,912 bytes	MD5: 0x98964436699F52FF55F9FDEEDBFBB249 SHA-1: 0x8D58BB0C47EC51C9B9A82BD0386DCB909A58D765	Trojan.Win32.VB.hux [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).

The following file was modified:

%System%\drivers\etc\hosts

The following directory was created:

%Temp%\IXP001.TMP

Memory Modifications

There were new processes created in the system:

Process Name	Process Filename	Main Module Size
uni000.exe	%Temp%\IXP001.TMP\uni000.exe	20,480 bytes
UNINST~3.EXE	%Temp%\IXP000.TMP\UNINST~3.EXE	135,168 bytes
UNINST~1.EXE	%Temp%\IXP001.TMP\UNINST~1.EXE	94,208 bytes
[filename of the sample #1]	[file and pathname of the sample #1]	884,736 bytes

The following module was loaded into the address space of other process(es):

Module Name	Module Filename	Address Space Details
iifGwXoP.dll	%System%\iifGwXoP.dll	Process name: explorer.exe Process filename: %Windir%\explorer.exe Address space: 0x19C0000 - 0x19DB000

Notes:

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

Registry Modifications

The following Registry Keys were created:

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{6D794CB4-C7CD-4c6f-BFDC-9B77AFBDC02C}
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{6D794CB4-C7CD-4c6f-BFDC-9B77AFBDC02C}\InprocServer32
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Control Panel\Settings
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\iifGwXoP
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\00cd0861
HKEY_CURRENT_USER\Software\Microsoft\cs41275

The newly created Registry Values are:

[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{6D794CB4-C7CD-4c6f-BFDC-9B77AFBDC02C}\InprocServer32]

(Default) = "%System%\iifGwXoP.dll"
ThreadingModel = "Both"

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Control Panel\Settings]

Time = 30 23 6D 65 55 32 C9 01 00 00 00 00

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\ShellExecuteHooks]

{6D794CB4-C7CD-4c6f-BFDC-9B77AFBDC02C} = ""

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\iifGwXoP]

Asynchronous = 0x00000001
DllName = "iifGwXoP.dll"
Impersonate = 0x00000000
Logon = "o"
Logoff = "f"

so that iifGwXoP.dll is installed as a Winlogon notification package

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\00cd0861]

(Default) = "60CAC8EB84284D6CBD179DF959D658E8&"

[HKEY_CURRENT_USER\Software\Microsoft\Installer]

(Default) = 8A 0F D6 65 55 32 C9 01

The following Registry Value was modified:

[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3]

1A10 = 0x00000000
{AEBA21FA-782A-4A90-978D-B72164C80120} = 1A 37 61 59 23 52 35 0C 7A 5F 20 17 2F 1E 1A 19 0E 2B 01 73 13 37 13 12 14 1A 15 2A
{A8A88C49-5EB2-4990-A1A2-0876022C854F} = 1A 37 61 59 23 52 35 0C 7A 5F 20 17 2F 1E 1A 19 0E 2B 01 73 13 37 13 12 14 1A 15 2A

Other details

The HOSTS file was updated with the following URL-to-IP mappings:

The following Internet download was started (the retrieved bits are saved into the local file):

URL to be downloaded	Filename for the downloaded bits
http://childhe.com/pas/apstpldr.dll.html?affid=163328&uid=&guid=60CAC8EB84284D6CBD179DF959D658E8	%System%\pmnoLeef.dll

There was application-defined hook procedure installed into the hook chain (e.g. to monitor keystrokes). The installed hook is handled by the following module:

%System%\iifGwXoP.dll

Downloaded File Summary:

Download details:

Download retrieved: 3 January 2009 23:01:13
Processing time: 6 min 25 sec
Downloaded sample:

File MD5: 0x9DAD88A679C9EBD08C14FF9268B02494
File SHA-1: 0xB54BAA707B274A6243F25BA930A5E0A4C34D6134
Filesize: 72,192 bytes
Alias:

Trojan Horse [Symantec]
Trojan.Win32.Pakes.mmg [Kaspersky Lab]
Trojan:Win32/Vundo [Microsoft]
Trojan.Win32.Vundo [Ikarus]

Summary of the findings:

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

Technical Details:

Possible Security Risk

Attention! The following threat category was identified:

Threat Category	Description
	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]	72,192 bytes	MD5: 0x9DAD88A679C9EBD08C14FF9268B02494 SHA-1: 0xB54BAA707B274A6243F25BA930A5E0A4C34D6134	Trojan Horse [Symantec] Trojan.Win32.Pakes.mmg [Kaspersky Lab] Trojan:Win32/Vundo [Microsoft] Trojan.Win32.Vundo [Ikarus]

Memory Modifications

The following module was loaded into the address space of other process(es):

Module Name	Module Filename	Address Space Details
[filename of the sample #1]	[file and pathname of the sample #1]	Process name: [generic host process] Process filename: [generic host process filename] Address space: 0x10000000 - 0x1001A000

Note:

[generic host process filename] is a full path filename of [generic host process].

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