ThreatExpert Report: Worm:Win32/Filunork.A

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Submission Summary:

Submission details:

Submission received: 30 September 2012, 04:27:02
Processing time: 7 min 40 sec
Submitted sample:

File MD5: 0x54FFD636BBEEB7640B40B463CC8B3031
File SHA-1: 0x121FE0250162000EF7AB1330C1B543DC3D731385
Filesize: 262,144 bytes
Alias: Worm:Win32/Filunork.A [Microsoft]

Technical Details:

File System Modifications

The following file was created in the system:

#	Filename(s)	File Size	File Hash	Alias
1	[pathname with a string SHARE]\svchost.exe [file and pathname of the sample #1]	262,144 bytes	MD5: 0x54FFD636BBEEB7640B40B463CC8B3031 SHA-1: 0x121FE0250162000EF7AB1330C1B543DC3D731385	Worm:Win32/Filunork.A [Microsoft]

The following directories were created:

[pathname with a string SHARE]\WindowsUpdate
[pathname with a string SHARE]\svchost
%System%\[filename of the sample #1 without extension]

Note:

%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 were new processes created in the system:

Process Name	Process Filename	Main Module Size
[filename of the sample #1]	[file and pathname of the sample #1]	270,336 bytes
svchost.exe	[pathname with a string SHARE]\svchost.exe	270,336 bytes

There was a new service created in the system:

Service Name	Display Name	Status	Service Filename
WSFilter	Windows Filter Foundation Framework	"Stopped"	[pathname with a string SHARE]\svchost.exe -s -k -netsvc

Registry Modifications

The following Registry Keys were created:

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\WSFilter
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\WSFilter\Security
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WSFilter
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WSFilter\Security

The newly created Registry Values are:

[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\WSFilter\Security]

Security = 01 00 14 80 90 00 00 00 9C 00 00 00 14 00 00 00 30 00 00 00 02 00 1C 00 01 00 00 00 02 80 14 00 FF 01 0F 00 01 01 00 00 00 00 00 01 00 00 00 00 02 00 60 00 04 00 00 00 00 00 14 00 FD 01 02 00 01 01 00 00 00 00 00 05 12 00 00 00 00 00 18 00 FF 01 0F 0

[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\WSFilter]

Type = 0x00000010
Start = 0x00000002
ErrorControl = 0x00000001
ImagePath = [pathname with a string SHARE]\svchost.exe -s -k -netsvc"
DisplayName = "Windows Filter Foundation Framework"
ObjectName = "LocalSystem"

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WSFilter\Security]

Security = 01 00 14 80 90 00 00 00 9C 00 00 00 14 00 00 00 30 00 00 00 02 00 1C 00 01 00 00 00 02 80 14 00 FF 01 0F 00 01 01 00 00 00 00 00 01 00 00 00 00 02 00 60 00 04 00 00 00 00 00 14 00 FD 01 02 00 01 01 00 00 00 00 00 05 12 00 00 00 00 00 18 00 FF 01 0F 0

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WSFilter]

Type = 0x00000010
Start = 0x00000002
ErrorControl = 0x00000001
ImagePath = [pathname with a string SHARE]\svchost.exe -s -k -netsvc"
DisplayName = "Windows Filter Foundation Framework"
ObjectName = "LocalSystem"

Other details

Analysis of the file resources indicate the following possible country of origin:

China

The following Host Name was requested from a host database:

192.5.5.241

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