Analysis by: Byron Jon Gelera
ALIASES:

a variant of Win32/Toolbar.Babylon.A potentially unwanted (ESET-NOD32)

 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.

  TECHNICAL DETAILS

File Size: 3,644,416 bytes
File Type: EXE
Memory Resident: No
Initial Samples Received Date: 14 Jul 2017

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:

  • %Program Files%\Puran Defrag
  • %All Users Profile%\Start Menu\Programs\Puran Defrag
  • %AppDataLocal%\Babylon
  • %Application Data%\Babylon

(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.. %All Users Profile% is the All Users folder, where it usually is C:\Documents and Settings\All Users on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\ProgramData 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.. %AppDataLocal% is the Application Data folder found in Local Settings, where it is usually C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local 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.)

It drops the following files:

  • %Program Files%\Puran Defrag\unins000.exe
  • %Program Files%\Puran Defrag\PuranDefragGUI.exe
  • %Program Files%\Puran Defrag\PuranADT.exe
  • %Program Files%\Puran Defrag\hbg.jpg
  • %Program Files%\Puran Defrag\exclude.txt
  • %Program Files%\Puran Defrag\delete.txt
  • %Program Files%\Puran Defrag\PuranDefrag.chm
  • %Program Files%\Puran Defrag\PuranDefrag.html
  • %Program Files%\Puran Defrag\Puran Defrag.url
  • %Program Files%\Puran Defrag\unins000.msg
  • %Program Files%\Puran Defrag\unins000.dat
  • %System%\PuranFD.exe
  • %System%\PuranDefragS.exe
  • %System%\PuranDefragBT.exe
  • %System%\PuranDC.exe
  • %System%\PuranDefrag.dll
  • %All Users Profile%\Start Menu\Programs\Puran Defrag\Puran Defrag.lnk
  • %All Users Profile%\Start Menu\Programs\Puran Defrag\Puran Defrag on the Web.lnk
  • %All Users Profile%\Start Menu\Programs\Puran Defrag\Help.lnk
  • %All Users Profile%\Desktop\Babylon.lnk
  • %AppDataLocal%\Babylon\Setup\bab025.cbid10.dat
  • %AppDataLocal%\Babylon\Setup\Babylon.dat
  • %AppDataLocal%\Babylon\Setup\BExternal.dll
  • %AppDataLocal%\Babylon\Setup\IECookieLow.dll
  • %AppDataLocal%\Babylon\Setup\Setup.exe
  • %AppDataLocal%\Babylon\Setup\SetupStrings.dat
  • %AppDataLocal%\Babylon\Setup\sign
  • %AppDataLocal%\Babylon\Setup\sqlite3.dll
  • %AppDataLocal%\Babylon\Setup\HtmlScreens\blueStar.png
  • %AppDataLocal%\Babylon\Setup\HtmlScreens\cmbx.png
  • %AppDataLocal%\Babylon\Setup\HtmlScreens\common.js
  • %AppDataLocal%\Babylon\Setup\HtmlScreens\eula.html
  • %AppDataLocal%\Babylon\Setup\HtmlScreens\globe.png
  • %AppDataLocal%\Babylon\Setup\HtmlScreens\lngs.png
  • %AppDataLocal%\Babylon\Setup\HtmlScreens\page0.html
  • %AppDataLocal%\Babylon\Setup\HtmlScreens\page1.css
  • %AppDataLocal%\Babylon\Setup\HtmlScreens\page1.html
  • %AppDataLocal%\Babylon\Setup\HtmlScreens\page1.js
  • %AppDataLocal%\Babylon\Setup\HtmlScreens\page1Lrg.css
  • %AppDataLocal%\Babylon\Setup\HtmlScreens\page2.css
  • %AppDataLocal%\Babylon\Setup\HtmlScreens\page2.html
  • %AppDataLocal%\Babylon\Setup\HtmlScreens\page2.js
  • %AppDataLocal%\Babylon\Setup\HtmlScreens\page2Lrg.css
  • %AppDataLocal%\Babylon\Setup\HtmlScreens\page3.css
  • %AppDataLocal%\Babylon\Setup\HtmlScreens\page3.html
  • %AppDataLocal%\Babylon\Setup\HtmlScreens\page3Lrg.css
  • %AppDataLocal%\Babylon\Setup\HtmlScreens\page4.css
  • %AppDataLocal%\Babylon\Setup\HtmlScreens\page4.html
  • %AppDataLocal%\Babylon\Setup\HtmlScreens\page4Lrg.css
  • %AppDataLocal%\Babylon\Setup\HtmlScreens\page9.html
  • %AppDataLocal%\Babylon\Setup\HtmlScreens\pBar.gif
  • %AppDataLocal%\Babylon\Setup\HtmlScreens\progress.png
  • %AppDataLocal%\Babylon\Setup\HtmlScreens\setup.js
  • %AppDataLocal%\Babylon\Setup\HtmlScreens\title.png
  • %AppDataLocal%\Babylon\Setup\HtmlScreens\title1.png
  • %AppDataLocal%\Babylon\Setup\HtmlScreens\title2.png
  • %AppDataLocal%\Babylon\Setup\HtmlScreens\toolBar.jpg
  • %AppDataLocal%\Babylon\Setup\HtmlScreens\vIcn.png
  • %AppDataLocal%\Babylon\Setup\HtmlScreens\_options.js
  • %Program Files%\Mozilla Firefox\searchplugins\babylon.xml
  • %Application Data%\Babylon\log_file.txt
  • %Application Data%\Mozilla\Firefox\Profiles\03chnxd8.default\prefs.js

(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.. %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.. %All Users Profile% is the All Users folder, where it usually is C:\Documents and Settings\All Users on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\ProgramData 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.. %AppDataLocal% is the Application Data folder found in Local Settings, where it is usually C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local 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.)

It drops and executes the following files:

  • %Program Files%\Puran Defrag\PuranDefragGUI.exe
  • %System%\PuranDefragS.exe
  • %System%\PuranDefrag.dll
  • %Program Files%\Puran Defrag\PuranDefrag.chm

(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.. %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)

Other System Modifications

This Potentially Unwanted Application adds the following registry keys:

HKEY_LOCAL_MACHINE\SOFTWARE\Puran Software

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Puran Defrag_is1

HKEY_CURRENT_USER\Software\BabyTest

HKEY_LOCAL_MACHINE\SOFTWARE\BabyTest

It adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Puran Software\
Puran Defrag
Path = %Program Files%\Puran Defrag

HKEY_LOCAL_MACHINE\SOFTWARE\Puran Software\
Puran Defrag
WindowsDirectory = %Windows%

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Puran Defrag_is1
Inno Setup: Setup Version = 5.4.3 (u)

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Puran Defrag_is1
Inno Setup: App Path = %Program Files%\Puran Defrag

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Puran Defrag_is1
InstallLocation = %Program Files%\Puran Defrag\

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Puran Defrag_is1
Inno Setup: Icon Group = Puran Defrag

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Puran Defrag_is1
Inno Setup: User = {username}

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Puran Defrag_is1
Inno Setup: Selected Tasks = ""

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Puran Defrag_is1
Inno Setup: Deselected Tasks = desktopicon

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Puran Defrag_is1
Inno Setup: Language = eng

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Puran Defrag_is1
DisplayName = Puran Defrag 7.5

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Puran Defrag_is1
UninstallString = "%Program Files%\Puran Defrag\unins000.exe"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Puran Defrag_is1
QuietUninstallString = "%Program Files%\Puran Defrag\unins000.exe" /SILENT

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Puran Defrag_is1
Publisher = Puran Software

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Puran Defrag_is1
URLInfoAbout = {URL}

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Puran Defrag_is1
HelpLink = {URL}

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Puran Defrag_is1
URLUpdateInfo = {URL}

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Puran Defrag_is1
NoModify = 1

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Puran Defrag_is1
NoRepair = 1

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Puran Defrag_is1
InstallDate = {date}

HKEY_LOCAL_MACHINE\SOFTWARE\Babylon\
Babylon Client\DefaultSettings
SetSearch = 3

HKEY_LOCAL_MACHINE\SOFTWARE\BabylonToolbar\
BabylonToolbar
NT_URL = {URL}

HKEY_LOCAL_MACHINE\SOFTWARE\BabylonToolbar\
BabylonToolbar
TB_URL = {URL}

It modifies the following registry entries:

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Main
Start Page = "{Babylon URL}"

(Note: The default value data of the said registry entry is "{User Defined}".)

Other Details

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

  • http://info.{BLOCKED}n.com/stat/report.php?no_policy={value}&lang={value}&source={value}&stage={value}&ver=9.0.4.30&affilID={value}&guid={value}&mntrId={value}&iev={value}&ffv={value}&crv={value}&dwb={value}&sutp={value}&sufl={value}&dnld={value}&dcnt={value}&dtot={value}&tbp={value}&prver={value}&impdir={value}&impt={value}&exc={value}&minreq={value}&wvr={value}&tbtp={value}&cntry={value}&osp={value}&dnt={value}
  • http://stp.{BLOCKED}n.com/downloader.php?ver={value}&affilID={value}&guid={value}&mntrId={value}&iev={value}&ffv={value}&crv={value}&dwb={value}&sutp={value}&sufl={value}&dnld={value}&dcnt={value}&dtot={value}&tbp={value}&prver={value}&impdir={value}&impt={value}&exc={value}&minreq={value}&wvr={value}&tbtp={value}&cntry={value}&osp={value}&dnt={value}&lang={value}&zpb={value}&geo={value}
  • http://info.{BLOCKED}n.com/stat/report.php?no_policy={value}&lang={value}&source={value}&stage={value}&ver={value}&affilID={value}&guid={value}&mntrId={value}&iev={value}&ffv={value}&crv={value}&dwb={value}&sutp={value}&sufl={value}&dnld={value}&dcnt={value}&dtot={value}&tbp={value}&prver={value}&impdir={value}&impt={value}&exc={value}&minreq={value}&wvr={value}&tbtp={value}&cntry={value}&osp={value}&dnt={value}&spbi={value}&IE1_shps&hp={value}&dsp={value}&tb={value}&hpx={value}&dspx={value}&tbx={value}&dtct={value}&excd={value}

  SOLUTION

Minimum Scan Engine: 9.850
SSAPI PATTERN File: 1.863.00
SSAPI PATTERN Date: 10 Aug 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

Identify and terminate files detected as PUA_BABYLONTOOLBAR.GB

[ Learn More ]
  1. Windows Task Manager may not display all running processes. In this case, please use a third-party process viewer, preferably Process Explorer, to terminate the malware/grayware/spyware file. You may download the said tool here.
  2. If the detected file is displayed in either Windows Task Manager or Process Explorer but you cannot delete it, restart your computer in safe mode. To do this, refer to this link for the complete steps.
  3. If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.

Step 4

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
    • Puran Software
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall
    • Puran Defrag_is1
  • In HKEY_CURRENT_USER\Software
    • BabyTest
  • In HKEY_LOCAL_MACHINE\SOFTWARE
    • BabyTest

Step 5

Restore this modified registry value

[ 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_CURRENT_USER\Software\Microsoft\Internet Explorer\Main
    • From: Start Page = {Babylon URL}
      To: Start Page = {user defined}

Step 6

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.
  • %Program Files%\Puran Defrag
  • %All Users Profile%\Start Menu\Programs\Puran Defrag
  • %AppDataLocal%\Babylon
  • %Application Data%\Babylon

Step 7

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.
  • %System%\PuranFD.exe
  • %System%\PuranDefragS.exe
  • %System%\PuranDefragBT.exe
  • %System%\PuranDC.exe
  • %System%\PuranDefrag.dll
  • %All Users Profile%\Desktop\Babylon.lnk
  • %Program Files%\Mozilla Firefox\searchplugins\babylon.xml
  • %Application Data%\Mozilla\Firefox\Profiles\03chnxd8.default\prefs.js

Step 8

Scan your computer with your Trend Micro product to delete files detected as PUA_BABYLONTOOLBAR.GB. 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.

Step 9

Search and delete this file

[ 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. DATA_GENERIC
  • 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:

    1. 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.
    2. In the Search Computer/This PC input box, type:
      DATA_GENERIC
    3. 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.


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