WORM_FILUNORK.POL

November 11, 2014

ALIASES:

Worm:Win32/Filunork.A (Microsoft); RDN/Generic Dropper!vm (McAfee); Trojan.Gen (Symantec); Trojan horse Agent4.BSJX, Trojan horse Agent4.BSJX.dropper (AVG)

PLATFORM:

Windows

OVERALL RISK RATING:

DAMAGE POTENTIAL:

DISTRIBUTION POTENTIAL:

REPORTED INFECTION:

Threat Type: Worm
Destructiveness: No
Encrypted:
In the wild: Yes

OVERVIEW

This worm arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

TECHNICAL DETAILS

File Size:

446,976 bytes

File Type:

EXE

Memory Resident:

Initial Samples Received Date:

11 Nov 2014

Arrival Details

This worm arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Installation

This worm drops the following copies of itself into the affected system:

%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\vmhlp.exe
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\svc.exe

It creates the following folders:

%Program Files%\Common Files\Microsoft Shared\WindowsUpdate
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data\S-1-5-21-5180775055-7754787676-8052534957-1050
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data\S-1-5-21-5180775055-7754787676-8052534957-1050\RP73
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data\S-1-5-21-5180775055-7754787676-8052534957-1050\RP74
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data\S-1-5-21-5180775055-7754787676-8052534957-1050\RP71
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internal Application Data
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internal Application Data\TemporayVolumnFiles
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\ThirdPartyAppData

Dropping Routine

This worm drops the following files:

%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\MS12027_Dll.dll
%Temp%\pf2
%Temp%\pf3
%Temp%\pf4
%Temp%\pf5
%Temp%\pf6
%Temp%\pf7
%Temp%\pf8
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data\S-1-5-21-5180775055-7754787676-8052534957-1050\RP71\20141101194528~C.cab
%Temp%\pf9
%Temp%\pf10
%Temp%\pf11
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data\S-1-5-21-5180775055-7754787676-8052534957-1050\RP71\20141101194528~C.mtp
%Temp%\pf12
%Temp%\pf13
%Temp%\pf14
%Temp%\pf15
%Temp%\pf16
%Temp%\pf17
%Temp%\pf18
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data\S-1-5-21-5180775055-7754787676-8052534957-1050\RP71\20141101194546~7.mts
%Temp%\pf19
%Temp%\pf20
%Temp%\pf21
%Temp%\pf22
%Temp%\pf23
%Temp%\pf24
%Temp%\pf25
%Temp%\pf26
%Temp%\pf27
%Temp%\pf28
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data\S-1-5-21-5180775055-7754787676-8052534957-1050\RP71\20141101194605~7.mts
%Temp%\pf29
%Temp%\pf30
%Temp%\pf31
%Temp%\pf32
%Temp%\pf33
%Temp%\pf34
%Temp%\pf35
%Temp%\pf36
%Temp%\pf37
%Temp%\pf38
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data\S-1-5-21-5180775055-7754787676-8052534957-1050\RP71\20141101194612~7.mts
%Temp%\pf39
%Temp%\pf40
%Temp%\pf41
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\sp.inf
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data\S-1-5-21-5180775055-7754787676-8052534957-1050\RP71\20141101194528~C
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data\S-1-5-21-5180775055-7754787676-8052534957-1050\RP71\20141101194543~D
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data\S-1-5-21-5180775055-7754787676-8052534957-1050\RP71\20141101194546~7
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data\S-1-5-21-5180775055-7754787676-8052534957-1050\RP71\20141101194605~7
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data\S-1-5-21-5180775055-7754787676-8052534957-1050\RP71\20141101194612~7
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data\S-1-5-21-5180775055-7754787676-8052534957-1050\RP71\20141101194620~D

(Note: %Program Files% is the Program Files folder, where it usually is C:\Program Files on all Windows operating system versions; C:\Program Files (x86) for 32-bit applications running on Windows 64-bit operating systems.. %Temp% is the Windows temporary folder, where it usually is C:\Windows\Temp on all Windows operating system versions.)

This report is generated via an automated analysis system.

SOLUTION

Minimum Scan Engine:

9.700

Step 1

Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.

Step 2

Search and delete these components

[ Learn More ]

There may be some components that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the "More advanced options" option to include all hidden files and folders in the search result.

%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\MS12027_Dll.dll
%Temp%\pf2
%Temp%\pf3
%Temp%\pf4
%Temp%\pf5
%Temp%\pf6
%Temp%\pf7
%Temp%\pf8
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data\S-1-5-21-5180775055-7754787676-8052534957-1050\RP71\20141101194528~C.cab
%Temp%\pf9
%Temp%\pf10
%Temp%\pf11
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data\S-1-5-21-5180775055-7754787676-8052534957-1050\RP71\20141101194528~C.mtp
%Temp%\pf12
%Temp%\pf13
%Temp%\pf14
%Temp%\pf15
%Temp%\pf16
%Temp%\pf17
%Temp%\pf18
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data\S-1-5-21-5180775055-7754787676-8052534957-1050\RP71\20141101194546~7.mts
%Temp%\pf19
%Temp%\pf20
%Temp%\pf21
%Temp%\pf22
%Temp%\pf23
%Temp%\pf24
%Temp%\pf25
%Temp%\pf26
%Temp%\pf27
%Temp%\pf28
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data\S-1-5-21-5180775055-7754787676-8052534957-1050\RP71\20141101194605~7.mts
%Temp%\pf29
%Temp%\pf30
%Temp%\pf31
%Temp%\pf32
%Temp%\pf33
%Temp%\pf34
%Temp%\pf35
%Temp%\pf36
%Temp%\pf37
%Temp%\pf38
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data\S-1-5-21-5180775055-7754787676-8052534957-1050\RP71\20141101194612~7.mts
%Temp%\pf39
%Temp%\pf40
%Temp%\pf41
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\sp.inf
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data\S-1-5-21-5180775055-7754787676-8052534957-1050\RP71\20141101194528~C
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data\S-1-5-21-5180775055-7754787676-8052534957-1050\RP71\20141101194543~D
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data\S-1-5-21-5180775055-7754787676-8052534957-1050\RP71\20141101194546~7
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data\S-1-5-21-5180775055-7754787676-8052534957-1050\RP71\20141101194605~7
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data\S-1-5-21-5180775055-7754787676-8052534957-1050\RP71\20141101194612~7
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data\S-1-5-21-5180775055-7754787676-8052534957-1050\RP71\20141101194620~D

To manually delete a malware/grayware file from an affected system:

• For Windows 2000, Windows XP, and Windows Server 2003:

Right-click Start then click Search....
In the File name* input box, type the following:
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\MS12027_Dll.dll
%Temp%\pf2
%Temp%\pf3
%Temp%\pf4
%Temp%\pf5
%Temp%\pf6
%Temp%\pf7
%Temp%\pf8
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data\S-1-5-21-5180775055-7754787676-8052534957-1050\RP71\20141101194528~C.cab
%Temp%\pf9
%Temp%\pf10
%Temp%\pf11
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data\S-1-5-21-5180775055-7754787676-8052534957-1050\RP71\20141101194528~C.mtp
%Temp%\pf12
%Temp%\pf13
%Temp%\pf14
%Temp%\pf15
%Temp%\pf16
%Temp%\pf17
%Temp%\pf18
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data\S-1-5-21-5180775055-7754787676-8052534957-1050\RP71\20141101194546~7.mts
%Temp%\pf19
%Temp%\pf20
%Temp%\pf21
%Temp%\pf22
%Temp%\pf23
%Temp%\pf24
%Temp%\pf25
%Temp%\pf26
%Temp%\pf27
%Temp%\pf28
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data\S-1-5-21-5180775055-7754787676-8052534957-1050\RP71\20141101194605~7.mts
%Temp%\pf29
%Temp%\pf30
%Temp%\pf31
%Temp%\pf32
%Temp%\pf33
%Temp%\pf34
%Temp%\pf35
%Temp%\pf36
%Temp%\pf37
%Temp%\pf38
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data\S-1-5-21-5180775055-7754787676-8052534957-1050\RP71\20141101194612~7.mts
%Temp%\pf39
%Temp%\pf40
%Temp%\pf41
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\sp.inf
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data\S-1-5-21-5180775055-7754787676-8052534957-1050\RP71\20141101194528~C
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data\S-1-5-21-5180775055-7754787676-8052534957-1050\RP71\20141101194543~D
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data\S-1-5-21-5180775055-7754787676-8052534957-1050\RP71\20141101194546~7
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data\S-1-5-21-5180775055-7754787676-8052534957-1050\RP71\20141101194605~7
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data\S-1-5-21-5180775055-7754787676-8052534957-1050\RP71\20141101194612~7
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data\S-1-5-21-5180775055-7754787676-8052534957-1050\RP71\20141101194620~D
In the Look In drop-down list, select My Computer then press Enter.
Once located, select the file then press SHIFT+DELETE to delete it.
*Note: The file name input box title varies depending on the Windows version (e.g. Search for files or folders named or All or part of the file name.).

• For Windows Vista, Windows 7, Windows Server 2008, Windows 8, Windows 8.1, and Windows Server 2012:

Open a Windows Explorer window.
- For Windows Vista, 7, and Server 2008 users, click Start>Computer.
- For Windows 8, 8.1, and Server 2012 users, right-click on the lower left corner of the screen,then click File Explorer.
In the Search Computer/This PC input box, type:
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\MS12027_Dll.dll
%Temp%\pf2
%Temp%\pf3
%Temp%\pf4
%Temp%\pf5
%Temp%\pf6
%Temp%\pf7
%Temp%\pf8
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data\S-1-5-21-5180775055-7754787676-8052534957-1050\RP71\20141101194528~C.cab
%Temp%\pf9
%Temp%\pf10
%Temp%\pf11
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data\S-1-5-21-5180775055-7754787676-8052534957-1050\RP71\20141101194528~C.mtp
%Temp%\pf12
%Temp%\pf13
%Temp%\pf14
%Temp%\pf15
%Temp%\pf16
%Temp%\pf17
%Temp%\pf18
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data\S-1-5-21-5180775055-7754787676-8052534957-1050\RP71\20141101194546~7.mts
%Temp%\pf19
%Temp%\pf20
%Temp%\pf21
%Temp%\pf22
%Temp%\pf23
%Temp%\pf24
%Temp%\pf25
%Temp%\pf26
%Temp%\pf27
%Temp%\pf28
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data\S-1-5-21-5180775055-7754787676-8052534957-1050\RP71\20141101194605~7.mts
%Temp%\pf29
%Temp%\pf30
%Temp%\pf31
%Temp%\pf32
%Temp%\pf33
%Temp%\pf34
%Temp%\pf35
%Temp%\pf36
%Temp%\pf37
%Temp%\pf38
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data\S-1-5-21-5180775055-7754787676-8052534957-1050\RP71\20141101194612~7.mts
%Temp%\pf39
%Temp%\pf40
%Temp%\pf41
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\sp.inf
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data\S-1-5-21-5180775055-7754787676-8052534957-1050\RP71\20141101194528~C
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data\S-1-5-21-5180775055-7754787676-8052534957-1050\RP71\20141101194543~D
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data\S-1-5-21-5180775055-7754787676-8052534957-1050\RP71\20141101194546~7
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data\S-1-5-21-5180775055-7754787676-8052534957-1050\RP71\20141101194605~7
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data\S-1-5-21-5180775055-7754787676-8052534957-1050\RP71\20141101194612~7
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data\S-1-5-21-5180775055-7754787676-8052534957-1050\RP71\20141101194620~D
Once located, select the file then press SHIFT+DELETE to delete it.
*Note: Read the following Microsoft page if these steps do not work on Windows 7.

Step 3

Search and delete these folders

[ Learn More ]

Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden folders in the search result.

%Program Files%\Common Files\Microsoft Shared\WindowsUpdate
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data\S-1-5-21-5180775055-7754787676-8052534957-1050
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data\S-1-5-21-5180775055-7754787676-8052534957-1050\RP73
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data\S-1-5-21-5180775055-7754787676-8052534957-1050\RP74
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data\S-1-5-21-5180775055-7754787676-8052534957-1050\RP71
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internal Application Data
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internal Application Data\TemporayVolumnFiles
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\ThirdPartyAppData

To delete malware/grayware/spyware folders:

For Windows 2000, Windows XP, and Windows Server 2003:

Right-click Start then click Search... or Find..., depending on the version of Windows you are running.
In the File name* input box, type:

%Program Files%\Common Files\Microsoft Shared\WindowsUpdate
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data\S-1-5-21-5180775055-7754787676-8052534957-1050
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data\S-1-5-21-5180775055-7754787676-8052534957-1050\RP73
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data\S-1-5-21-5180775055-7754787676-8052534957-1050\RP74
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data\S-1-5-21-5180775055-7754787676-8052534957-1050\RP71
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internal Application Data
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internal Application Data\TemporayVolumnFiles
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\ThirdPartyAppData
In the Look In drop-down list, select My Computer, then press Enter.
Once located, select the folder then press SHIFT+DELETE to permanently delete the folder.
Repeat steps 2 to 4 for the remaining folders: %Program Files%\Common Files\Microsoft Shared\WindowsUpdate
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data\S-1-5-21-5180775055-7754787676-8052534957-1050
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data\S-1-5-21-5180775055-7754787676-8052534957-1050\RP73
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data\S-1-5-21-5180775055-7754787676-8052534957-1050\RP74
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data\S-1-5-21-5180775055-7754787676-8052534957-1050\RP71
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internal Application Data
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internal Application Data\TemporayVolumnFiles
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\ThirdPartyAppData

*Note: The file name input box title varies depending on the Windows version (e.g. Search for files or folders named or All or part of the file name.).

For Windows Vista, Windows 7, Windows Server 2008, Windows 8, Windows 8.1, and Windows Server 2012:

Open a Windows Explorer window.
- For Windows Vista, 7, and Server 2008 users, click Start>Computer.
- For Windows 8, 8.1, and Server 2012 users, right-click on the lower left corner of the screen, then click File Explorer.
In the Search Computer/This PC input box, type:
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data\S-1-5-21-5180775055-7754787676-8052534957-1050
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data\S-1-5-21-5180775055-7754787676-8052534957-1050\RP73
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data\S-1-5-21-5180775055-7754787676-8052534957-1050\RP74
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data\S-1-5-21-5180775055-7754787676-8052534957-1050\RP71
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internal Application Data
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internal Application Data\TemporayVolumnFiles
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\ThirdPartyAppData
Once located, select the file then press SHIFT+DELETE to permanently delete the folder.
Repeat steps 2-3 for the remaining folders: %Program Files%\Common Files\Microsoft Shared\WindowsUpdate
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data\S-1-5-21-5180775055-7754787676-8052534957-1050
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data\S-1-5-21-5180775055-7754787676-8052534957-1050\RP73
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data\S-1-5-21-5180775055-7754787676-8052534957-1050\RP74
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internet Application Data\S-1-5-21-5180775055-7754787676-8052534957-1050\RP71
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internal Application Data
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\Internal Application Data\TemporayVolumnFiles
%Program Files%\Common Files\Microsoft Shared\WindowsUpdate\ThirdPartyAppData

*Note: Read the following Microsoft page if these steps do not work on Windows 7.

Step 4

Scan your computer with your Trend Micro product to delete files detected as WORM_FILUNORK.POL. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check this Knowledge Base page for more information.

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WORM_FILUNORK.POL

OVERVIEW

TECHNICAL DETAILS

SOLUTION

Resources

Support

About Trend

Country Headquarters

WORM_FILUNORK.POL

OVERVIEW

TECHNICAL DETAILS

SOLUTION

Resources

Support

About Trend

Country Headquarters

The Americas

Middle East & Africa

Europe

Asia & Pacific