ALIASES:

Trojan.Win32.Generic!BT (Sunbelt)

 PLATFORM:

Windows

 OVERALL RISK RATING:
 REPORTED INFECTION:
 SYSTEM IMPACT RATING:
 INFORMATION EXPOSURE:

  • Threat Type: Adware

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This adware 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: 698,656 bytes
File Type: EXE
Memory Resident: No
Initial Samples Received Date: 13 Jan 2015

Arrival Details

This adware 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 adware creates the following folders:

  • %User Temp%\Tempdir
  • %User Temp%\TempDir

(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.)

Other System Modifications

This adware adds the following registry keys:

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{F126C9FC-9299-40F2-BD42-C59023AD1E7F}

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{F126C9FC-9299-40F2-BD42-C59023AD1E7F}\1.0

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{F126C9FC-9299-40F2-BD42-C59023AD1E7F}\1.0\
FLAGS

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{F126C9FC-9299-40F2-BD42-C59023AD1E7F}\1.0\
0

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{F126C9FC-9299-40F2-BD42-C59023AD1E7F}\1.0\
0\win32

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{F126C9FC-9299-40F2-BD42-C59023AD1E7F}\1.0\
HELPDIR

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{237FDFDB-3722-470E-8BA8-90196DABE967}

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{237FDFDB-3722-470E-8BA8-90196DABE967}\ProxyStubClsid

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{237FDFDB-3722-470E-8BA8-90196DABE967}\ProxyStubClsid32

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{237FDFDB-3722-470E-8BA8-90196DABE967}\TypeLib

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Main\FeatureControl

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Main\FeatureControl\
FEATURE_BROWSER_EMULATION

HKEY_CURRENT_USER\SOFTWARE\Appscion

It adds the following registry entries:

HKEY_CLASSES_ROOT
Setup.Application = "Setup.Application"

HKEY_CLASSES_ROOT
CLSID\{017E057B-DACF-4A07-B878-E294565E3F90} = "Setup.Application"

HKEY_CLASSES_ROOT
Setup.Application\CLSID = "{017E057B-DACF-4A07-B878-E294565E3F90}"

HKEY_CLASSES_ROOT
CLSID\{017E057B-DACF-4A07-B878-E294565E3F90}\ProgID = "Setup.Application"

HKEY_CLASSES_ROOT
CLSID\{017E057B-DACF-4A07-B878-E294565E3F90}\InprocHandler32 = "ole32.dll"

HKEY_CLASSES_ROOT
CLSID\{017E057B-DACF-4A07-B878-E294565E3F90}\LocalServer32 = "{malware path and file name} "

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{237FDFDB-3722-470E-8BA8-90196DABE967}\TypeLib
Version = "1.0"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Main\FeatureControl\
FEATURE_BROWSER_EMULATION
{malware file name} = "1aa"

HKEY_CURRENT_USER\Software\Appscion
AppInstanceUid = "9D13B254-1836-4CE5-8D56-18C4226FC4A7"

Dropping Routine

This adware drops the following files:

  • %User Temp%\TempDir\Chrome25156_Local State
  • %User Temp%\TempDir\Chrome25171_Local State
  • %User Temp%\TempDir\Chrome25187_Local State
  • %User Temp%\TempDir\Firefox25203_profiles.ini
  • %User Temp%\TempDir\Firefox25218_profiles.ini
  • %User Temp%\TempDir\Chrome25218_Local State
  • %User Temp%\TempDir\Firefox25234_profiles.ini
  • %User Temp%\TempDir\Chrome25234_Local State
  • %User Temp%\TempDir\Firefox25250_profiles.ini
  • %User Temp%\TempDir\Chrome25281_Local State
  • %User Temp%\TempDir\Chrome25296_Local State
  • %User Temp%\TempDir\Firefox25359_profiles.ini
  • %User Temp%\TempDir\Firefox25375_profiles.ini
  • %User Temp%\TempDir\Chrome25390_Local State
  • %User Temp%\TempDir\Firefox25421_profiles.ini
  • %User Temp%\TempDir\Chrome27031_Local State
  • %User Temp%\TempDir\Firefox27109_profiles.ini

(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.)

Other Details

This adware connects to the following possibly malicious URL:

  • http://setup.{BLOCKED}installer.com
  • {BLOCKED}.157.99
  • {BLOCKED}0.1
  • {BLOCKED}.228.38
  • {BLOCKED}.52.13

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

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\Classes\TypeLib
    • {F126C9FC-9299-40F2-BD42-C59023AD1E7F}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{F126C9FC-9299-40F2-BD42-C59023AD1E7F}
    • 1.0
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{F126C9FC-9299-40F2-BD42-C59023AD1E7F}\1.0
    • FLAGS
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{F126C9FC-9299-40F2-BD42-C59023AD1E7F}\1.0
    • 0
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{F126C9FC-9299-40F2-BD42-C59023AD1E7F}\1.0\0
    • win32
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{F126C9FC-9299-40F2-BD42-C59023AD1E7F}\1.0
    • HELPDIR
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface
    • {237FDFDB-3722-470E-8BA8-90196DABE967}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{237FDFDB-3722-470E-8BA8-90196DABE967}
    • ProxyStubClsid
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{237FDFDB-3722-470E-8BA8-90196DABE967}
    • ProxyStubClsid32
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{237FDFDB-3722-470E-8BA8-90196DABE967}
    • TypeLib
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main
    • FeatureControl
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main\FeatureControl
    • FEATURE_BROWSER_EMULATION
  • In HKEY_CURRENT_USER\SOFTWARE
    • Appscion

Step 3

Delete this 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_CLASSES_ROOT
    • Setup.Application = "Setup.Application"
  • In HKEY_CLASSES_ROOT
    • CLSID\{017E057B-DACF-4A07-B878-E294565E3F90} = "Setup.Application"
  • In HKEY_CLASSES_ROOT
    • Setup.Application\CLSID = "{017E057B-DACF-4A07-B878-E294565E3F90}"
  • In HKEY_CLASSES_ROOT
    • CLSID\{017E057B-DACF-4A07-B878-E294565E3F90}\ProgID = "Setup.Application"
  • In HKEY_CLASSES_ROOT
    • CLSID\{017E057B-DACF-4A07-B878-E294565E3F90}\InprocHandler32 = "ole32.dll"
  • In HKEY_CLASSES_ROOT
    • CLSID\{017E057B-DACF-4A07-B878-E294565E3F90}\LocalServer32 = "{malware path and file name} "
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{237FDFDB-3722-470E-8BA8-90196DABE967}\TypeLib
    • Version = "1.0"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_BROWSER_EMULATION
    • {malware file name} = "1aa"
  • In HKEY_CURRENT_USER\Software\Appscion
    • AppInstanceUid = "9D13B254-1836-4CE5-8D56-18C4226FC4A7"

Step 4

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.
  • %User Temp%\TempDir\Chrome25156_Local State
  • %User Temp%\TempDir\Chrome25171_Local State
  • %User Temp%\TempDir\Chrome25187_Local State
  • %User Temp%\TempDir\Firefox25203_profiles.ini
  • %User Temp%\TempDir\Firefox25218_profiles.ini
  • %User Temp%\TempDir\Chrome25218_Local State
  • %User Temp%\TempDir\Firefox25234_profiles.ini
  • %User Temp%\TempDir\Chrome25234_Local State
  • %User Temp%\TempDir\Firefox25250_profiles.ini
  • %User Temp%\TempDir\Chrome25281_Local State
  • %User Temp%\TempDir\Chrome25296_Local State
  • %User Temp%\TempDir\Firefox25359_profiles.ini
  • %User Temp%\TempDir\Firefox25375_profiles.ini
  • %User Temp%\TempDir\Chrome25390_Local State
  • %User Temp%\TempDir\Firefox25421_profiles.ini
  • %User Temp%\TempDir\Chrome27031_Local State
  • %User Temp%\TempDir\Firefox27109_profiles.ini

Step 5

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.
  • %User Temp%\Tempdir
  • %User Temp%\TempDir

Step 6

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