ThreatExpert Report: Trojan.Win32.Monder.acas, Trojan.Vundo, Vundo, Mal/Generic-A, Troj/Virtum-Gen..

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Submission Summary:

Submission details:

Submission received: 2 February 2009, 21:48:17
Processing time: 6 min 21 sec
Submitted sample:

File MD5: 0x19FC1E2E258763D5C149F7B195689CDB
File SHA-1: 0x4FF7601ED5E70AE9947B1FB631D88BC3EDE5091F
Filesize: 54,272 bytes
Alias:

Trojan.Vundo [Symantec]
Trojan.Win32.Monder.acas [Kaspersky Lab]
Vundo [McAfee]
Mal/Generic-A, Troj/Virtum-Gen [Sophos]
Trojan:Win32/Meredrop [Microsoft]
Trojan.Vundo [Ikarus]

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.
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%\yayaWPJY.bat	87 bytes	MD5: 0xFD6A66D5F9C54367FD3D70737D16D5AF SHA-1: 0x23B01ACBC460B235AEEA15812E215E2987938154	(not available)
2	%System%\geBssqQG.dll	36,864 bytes	MD5: 0xC399366F7185E355EEC977F36DEB9690 SHA-1: 0x9D731FCA181F0D52C113E7D7D607539EA6D460E3	Trojan.Vundo [Symantec] Vundo [McAfee] Troj/Virtum-Gen [Sophos] Trojan:Win32/Vundo.gen!R [Microsoft] Trojan.Vundo [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).
%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).

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]	94,208 bytes

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

Module Name	Module Filename	Address Space Details
geBssqQG.dll	%System%\geBssqQG.dll	Process name: explorer.exe Process filename: %Windir%\explorer.exe Address space: 0x18F0000 - 0x190B000

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\geBssqQG
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%\geBssqQG.dll"
ThreadingModel = "Both"

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

Time = D0 EA B1 06 C3 85 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\geBssqQG]

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

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

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\00cd0861]

(Default) = "16560FE91CD44DA3B8270F8528661238&"

[HKEY_CURRENT_USER\Software\Microsoft\Installer]

(Default) = 52 10 41 07 C3 85 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 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=172103&uid=&guid=16560FE91CD44DA3B8270F8528661238	%System%\ssqOEXqp.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%\geBssqQG.dll

Downloaded File Summary:

Download details:

Download retrieved: 2 February 2009 21:54:44
Processing time: 6 min 53 sec
Downloaded sample:

File MD5: 0x4A56334F3F65D45D90AA15C1BD2F3484
File SHA-1: 0x9DC0C1484500C73C5B39EA589532BD4E4833F7C0
Filesize: 48,128 bytes
Packer info: packed with: PE_Patch.UPX [Kaspersky Lab]

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! 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.

File System Modifications

The following files were created in the system:

#	Filename(s)	File Size	File Hash	Alias
1	%Temp%\tmp3.exe	125 bytes	MD5: 0x7C5F5A68051F6B0C0E9A2AD33C40D415 SHA-1: 0x120865765927A61AF83F02B83DC297EEDE61EC41	(not available)
2	%Temp%\tmp3.tmp	0 bytes	MD5: 0xD41D8CD98F00B204E9800998ECF8427E SHA-1: 0xDA39A3EE5E6B4B0D3255BFEF95601890AFD80709	(not available)
3	[file and pathname of the sample #1]	48,128 bytes	MD5: 0x4A56334F3F65D45D90AA15C1BD2F3484 SHA-1: 0x9DC0C1484500C73C5B39EA589532BD4E4833F7C0	packed with PE_Patch.UPX [Kaspersky Lab]
4	%Windir%\Tasks\oqgrrunt.job	322 bytes	MD5: 0x100EAA82DF5F02C846C320263959365E SHA-1: 0x24B83499789A177A3A20F26BE9265154ABE7BB69	(not available)

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).
%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
[generic host process]	[generic host process filename]	20,480 bytes
iexplore.exe	%ProgramFiles%\Internet Explorer\iexplore.exe	102,400 bytes

Notes:

[generic host process filename] is a full path filename of [generic host process].
%ProgramFiles% is a variable that refers to the Program Files folder. A typical path is C:\Program Files.

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: 0xB10000 - 0xB31000

Registry Modifications

The following Registry Key was created:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Preinstall

The newly created Registry Values are:

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Main]

Check_Associations = "no"

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Preinstall]

ncache_ntp = EC 53 2A F9 C3 85 C9 01

Other details

To mark the presence in the system, the following Mutex objects were created:

Global\zB50070
Global\f3c76214
arefitopentaloju
Global\zB50078
Global\zB5009C
_!SHMSFTHISTORY!_
_SHuassist.mtx
Global\zB100A4

The following Internet Connection was established:

Server Name	Server Port	Connect as User	Connection Password
childhe.com	80	(null)	(null)

The following GET requests were made:

pldr8?uid=&guid=&affid=169170&tid=txd30019&wci=b8cdd2b5g8b556139761968af718g8g8&vi=0&ci=0&li=0&hi=0&bi=0&ai=0
index.jpg

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

http://childhe.com/pldr8?uid=&guid=&affid=169170&tid=txd30019&wci=b8cdd2b5g8b556139761968af718g8g8&vi=0&ci=0&li=0&hi=0&bi=0&ai=0
localhost

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