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PUA_FUSIONCORE.GA

May 02, 2017
 ALIASES:

Riskware/FusionCore (Fortinet); PUP.Optional.InstallCore (Malwarebytes)

 PLATFORM:

Windows

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:
 INFORMATION EXPOSURE:

  • Threat Type: Potentially Unwanted Application

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This Potentially Unwanted Application arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites. It may be manually installed by a user.

It executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.

  TECHNICAL DETAILS

File Size:

1,867,192 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

26 Oct 2016

Arrival Details

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

It may be manually installed by a user.

Installation

This Potentially Unwanted Application adds the following folders:

  • %User Temp%\is-{random}.tmp
  • %User Temp%\nsd{random numbers}

(Note: %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)

It drops the following files:

  • %User Temp%\{Random}.log
  • %User Temp%\SetupLog{date}{number}.txt
  • %User Temp%\is-{random}.tmp\BkD3DA.tmp
  • %User Temp%\is-{random}.tmp\_isetup\_shfoldr.dll
  • %User Temp%\is-{random}.tmp\itdownload.dll
  • %User Temp%\is-{random}.tmp\freemake_dl.dll
  • %User Temp%\is-{random}.tmp\Fusion.dll
  • %User Temp%\nsd{random numbers}\css\ie6_main.css
  • %User Temp%\nsd{random numbers}\css\main.css
  • %User Temp%\nsd{random numbers}\css\sdk-ui\browse.css
  • %User Temp%\nsd{random numbers}\css\sdk-ui\button.css
  • %User Temp%\nsd{random numbers}\css\sdk-ui\checkbox.css
  • %User Temp%\nsd{random numbers}\css\sdk-ui\images\button-bg.png
  • %User Temp%\nsd{random numbers}\css\sdk-ui\images\progress-bg-corner.png
  • %User Temp%\nsd{random numbers}\css\sdk-ui\images\progress-bg.png
  • %User Temp%\nsd{random numbers}\css\sdk-ui\images\progress-bg2.png
  • %User Temp%\nsd{random numbers}\css\sdk-ui\progress-bar.css
  • %User Temp%\nsd{random numbers}\csshover3.htc
  • %User Temp%\nsd{random numbers}\images\Loader.gif
  • %User Temp%\nsd{random numbers}\locale\AF.locale
  • %User Temp%\nsd{random numbers}\locale\AZ.locale
  • %User Temp%\nsd{random numbers}\locale\BE.locale
  • %User Temp%\nsd{random numbers}\locale\BG.locale
  • %User Temp%\nsd{random numbers}\locale\BS.locale
  • %User Temp%\nsd{random numbers}\locale\CA.locale
  • %User Temp%\nsd{random numbers}\locale\CS.locale
  • %User Temp%\nsd{random numbers}\locale\DA.locale
  • %User Temp%\nsd{random numbers}\locale\DE.locale
  • %User Temp%\nsd{random numbers}\locale\EL.locale
  • %User Temp%\nsd{random numbers}\locale\EN.locale
  • %User Temp%\nsd{random numbers}\locale\ES.locale
  • %User Temp%\nsd{random numbers}\locale\ET.locale
  • %User Temp%\nsd{random numbers}\locale\EU.locale
  • %User Temp%\nsd{random numbers}\locale\FA.locale
  • %User Temp%\nsd{random numbers}\locale\FI.locale
  • %User Temp%\nsd{random numbers}\locale\FR.locale
  • %User Temp%\nsd{random numbers}\locale\GU.locale
  • %User Temp%\nsd{random numbers}\locale\HE.locale
  • %User Temp%\nsd{random numbers}\locale\HI.locale
  • %User Temp%\nsd{random numbers}\locale\HR.locale
  • %User Temp%\nsd{random numbers}\locale\HT.locale
  • %User Temp%\nsd{random numbers}\locale\HU.locale
  • %User Temp%\nsd{random numbers}\locale\HY.locale
  • %User Temp%\nsd{random numbers}\locale\ID.locale
  • %User Temp%\nsd{random numbers}\locale\IS.locale
  • %User Temp%\nsd{random numbers}\locale\IT.locale
  • %User Temp%\nsd{random numbers}\locale\JA.locale
  • %User Temp%\nsd{random numbers}\locale\KA.locale
  • %User Temp%\nsd{random numbers}\locale\KK.locale
  • %User Temp%\nsd{random numbers}\locale\KO.locale
  • %User Temp%\nsd{random numbers}\locale\KU.locale
  • %User Temp%\nsd{random numbers}\locale\LO.locale
  • %User Temp%\nsd{random numbers}\locale\LT.locale
  • %User Temp%\nsd{random numbers}\locale\LV.locale
  • %User Temp%\nsd{random numbers}\locale\MK.locale
  • %User Temp%\nsd{random numbers}\locale\ML.locale
  • %User Temp%\nsd{random numbers}\locale\MR.locale
  • %User Temp%\nsd{random numbers}\locale\MS.locale
  • %User Temp%\nsd{random numbers}\locale\NE.locale
  • %User Temp%\nsd{random numbers}\locale\NL.locale
  • %User Temp%\nsd{random numbers}\locale\NO.locale
  • %User Temp%\nsd{random numbers}\locale\PA.locale
  • %User Temp%\nsd{random numbers}\locale\PL.locale
  • %User Temp%\nsd{random numbers}\locale\PS.locale
  • %User Temp%\nsd{random numbers}\locale\PT.locale
  • %User Temp%\nsd{random numbers}\locale\RO.locale
  • %User Temp%\nsd{random numbers}\locale\RU.locale
  • %User Temp%\nsd{random numbers}\locale\SK.locale
  • %User Temp%\nsd{random numbers}\locale\SL.locale
  • %User Temp%\nsd{random numbers}\locale\SQ.locale
  • %User Temp%\nsd{random numbers}\locale\SR.locale
  • %User Temp%\nsd{random numbers}\locale\SV.locale
  • %User Temp%\nsd{random numbers}\locale\TA.locale
  • %User Temp%\nsd{random numbers}\locale\TE.locale
  • %User Temp%\nsd{random numbers}\locale\TH.locale
  • %User Temp%\nsd{random numbers}\locale\TL.locale
  • %User Temp%\nsd{random numbers}\locale\TR.locale
  • %User Temp%\nsd{random numbers}\locale\UK.locale
  • %User Temp%\nsd{random numbers}\locale\UR.locale
  • %User Temp%\nsd{random numbers}\locale\UZ.locale
  • %User Temp%\nsd{random numbers}\locale\VI.locale
  • %User Temp%\nsd{random numbers}\locale\YO.locale
  • %User Temp%\nsd{random numbers}\locale\ZH.locale
  • %User Temp%\nsd{random numbers}\locale\ZU.locale
  • %User Temp%\nsd{random numbers}\bootstrap_{number}.html
  • %User Temp%\is-{random}.tmp\topRightDownloadIcon.bmp
  • %User Temp%\is-{random}.tmp\releases.ini
  • %User Temp%\is-{random}.tmp\topRightDownloadIcon.bmp
  • %Application Data%\StormFall\sf.ico
  • %Desktop%\StormFall.lnk
  • %Application Data%\Microsoft\Internet Explorer\Quick Launch\StormFall.lnk
  • %Start Menu%\Programs\StormFall\StormFall.lnk
  • %Windows%\Tasks\StormFall{0-3}.job
  • %Application Data%\AION\td.ico
  • %Desktop%\AION.lnk
  • %Application Data%\Microsoft\Internet Explorer\Quick Launch\AION.lnk
  • %Start Menu%\Programs\AION\AION.lnk
  • %Windows%\Tasks\AION{0-3}.job

(Note: %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.. %Application Data% is the Application Data folder, where it usually is C:\Documents and Settings\{user name}\Application Data on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Roaming on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.. %Desktop% is the desktop folder, where it usually is C:\Documents and Settings\{user name}\Desktop in Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\Desktop in Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.. %Start Menu% is the Start Menu folder, where it usually is C:\Documents and Settings\{user name}\Start Menu on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Roaming\Microsoft\Windows\Start Menu on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.. %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.)

Other System Modifications

This Potentially Unwanted Application adds the following registry keys:

HKEY_LOCAL_MACHINE\SOFTWARE\Freemake

It adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Freemake
GUID = {GUID}

Download Routine

This Potentially Unwanted Application saves the files it downloads using the following names:

  • %User Temp%\FreemakeVideoConverterFull.exe

(Note: %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)

It then executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.

Other Details

This Potentially Unwanted Application connects to the following possibly malicious URL:

  • http://rp.{BLOCKED}r.com/?v={Value}&subver={Value}&pcrc={Value}
  • http://os.{BLOCKED}r.com/FusionFreemake/?v={Value}&c={Value}&t={Value}
  • http://cdneu.{BLOCKED}r.com/ofr/Solululadul/asgnd.cis
  • http://cdneu.{BLOCKED}r.com/ofr/Solululadul/osutils.cis
  • http://www.{BLOCKED}ke.com/releases.ini
  • http://cdneu.{BLOCKED}r.com/ofr/Nininininon/Nininininon_11Apr16.cis
  • http://cdneu.{BLOCKED}r.com/ofr/Malaromoro/Malaromoro_170515.cis
  • http://download.{BLOCKED}ke.net/FreemakeOriginals2/FreemakeVideoConverterFull.exe

  SOLUTION

Minimum Scan Engine:

9.850

SSAPI PATTERN File:

1.823.00

SSAPI PATTERN Date:

30 Mar 2017

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

Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.

Step 3

Delete this registry key

[ Learn More ]

Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.

 
  • In HKEY_LOCAL_MACHINE\SOFTWARE
    • Freemake

Step 4

Search and delete this folder

[ 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.
  • %User Temp%\nsd{random numbers}
  • %User Temp%\is-{random}.tmp

Step 5

Search and delete these files

[ Learn More ]
There may be some files 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.
  • %User Temp%\{Random}.log
  • %User Temp%\SetupLog{date}{number}.txt
  • %Application Data%\StormFall\sf.ico
  • %Desktop%\StormFall.lnk
  • %Application Data%\Microsoft\Internet Explorer\Quick Launch\StormFall.lnk
  • %Start Menu%\Programs\StormFall\StormFall.lnk
  • %Windows%\Tasks\StormFall{0-3}.job
  • %Application Data%\AION\td.ico
  • %Desktop%\AION.lnk
  • %Application Data%\Microsoft\Internet Explorer\Quick Launch\AION.lnk
  • %Start Menu%\Programs\AION\AION.lnk
  • %Windows%\Tasks\AION{0-3}.job
  • %User Temp%\FreemakeVideoConverterFull.exe

Step 6

Scan your computer with your Trend Micro product to delete files detected as PUA_FUSIONCORE.GA. 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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