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ADW_EXTENBRO.GB

July 29, 2016
 ALIASES:

PUP.Optional.TorrentSearch (Malwarebytes); PUA.Toolbar.Neobar (Ikarus); BrowserModifier:Win32/Neobar (Microsoft)

 PLATFORM:

Windows

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

2,083,513 bytes

File Type:

EXE

Initial Samples Received Date:

12 Jul 2016

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 drops the following files:

  • %User Temp%\Vyld1B1qTZ_{random numbers}\Chromium.dll
  • %User Temp%\Vyld1B1qTZ_{random numbers}\freebl3.dll
  • %User Temp%\Vyld1B1qTZ_{random numbers}\mEFV2d5
  • %User Temp%\Vyld1B1qTZ_{random numbers}\nOXBh9J.dll
  • %User Temp%\Vyld1B1qTZ_{random numbers}\nspr4.dll
  • %User Temp%\Vyld1B1qTZ_{random numbers}\nss3.dll
  • %User Temp%\Vyld1B1qTZ_{random numbers}\nssutil3.dll
  • %User Temp%\Vyld1B1qTZ_{random numbers}\plc4.dll
  • %User Temp%\Vyld1B1qTZ_{random numbers}\plds4.dll
  • %User Temp%\Vyld1B1qTZ_{random numbers}\rfBQNem
  • %User Temp%\Vyld1B1qTZ_{random numbers}\softokn3.dll
  • %User Temp%\Vyld1B1qTZ_{random numbers}\sqlite3.dll
  • %User Temp%\Vyld1B1qTZ_{random numbers}\uninstall.exe
  • %User Temp%\Vyld1B1qTZ_install_{random numbers}\PUA_Webtoolbar.exe
  • %User Temp%\{random characters}.tmp\InstallOptions.dll
  • %User Temp%\{random characters}.tmp\System.dll
  • %User Temp%\{random characters}.tmp\UserInfo.dll
  • %User Temp%\{random characters}.tmp\ioSpecial.ini
  • %User Temp%\{random characters}.tmp\modern-wizard.bmp
  • %Program Files%\Torrent Search\Th5ZP3W
  • %Program Files%\Torrent Search\uninstall.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.. %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.)

It creates the following folders:

  • %User Temp%\{random characters}.tmp
  • %User Temp%\Vyld1B1qTZ_{random numbers}
  • %User Temp%\Vyld1B1qTZ_install_{random numbers}
  • %Program Files%\Torrent Search

(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.. %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.)

Autostart Technique

This adware drops the following files:

  • %Windows%\Tasks\Update Service for Torrent Search.job
  • %Windows%\Tasks\Update Service for Torrent Search2.job

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

Other System Modifications

This adware adds the following registry keys:

HKEY_CURRENT_USER\Software\Microsoft\
Windows NT\CurrentVersion\AppCompatFlags

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Torrent Search

HKEY_CURRENT_USER\Software\Microsoft\
Windows NT\CurrentVersion\AppCompatFlags\
Compatibility Assistant

HKEY_CURRENT_USER\Software\Microsoft\
Windows NT\CurrentVersion\AppCompatFlags\
Compatibility Assistant\Persisted

It adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE
global UID = "{UID}"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Torrent Search
DisplayName = "TSearch"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Torrent Search
DisplayVersion = "2.0.0.4"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Torrent Search
Publisher = "Company Inc."

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Torrent Search
URLInfoAbout = "http://appsaddons.com/app_torrentsearch/"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Torrent Search
DisplayIcon = "\Torrent Search\uninstall.exe"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Torrent Search
UninstallString = "\Torrent Search\uninstall.exe"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Torrent Search
NoModify = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Torrent Search
NoRepair = "1"

HKEY_CURRENT_USER\Software\Microsoft\
Windows NT\CurrentVersion\AppCompatFlags\
Compatibility Assistant\Persisted
\Torrent Search\uninstall.exe = "32"

  SOLUTION

Minimum Scan Engine:

9.800

SSAPI PATTERN File:

1.751.00

SSAPI PATTERN Date:

21 Jul 2016

NOTES:

Trend customers:

    Keep your pattern and scan engine files updated. Trend Micro antivirus software can clean or remove most types of computer threats. Malware, though, such as Trojans, scripts, overwriting viruses and joke programs which are identified as uncleanable, should simply be deleted.

All Internet users:

  • Use HouseCall - the Trend Micro online threat scanner to check for malware that may already be on your PC.
  • Catch malware/grayware before they affect your PC or network. Secure your Web world with Trend Micro products that offer the best anti-threat and content security solutions for home users, corporate users, and ISPs. Go here for more information on Trend Micro products that fit your needs.


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