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TSPY_BANKER.WAV

November 25, 2013
 Modified by: Alvin Bacani
 PLATFORM:

Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)

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

  • Threat Type: Spyware

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Downloaded from the Internet

This spyware 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 downloaded from remote sites by other malware.

It sends gathered information to a predetermined email address using its own Simple Mail Transfer Protocol (SMTP) engine.

  TECHNICAL DETAILS

File Size:

2,276,352 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

14 Oct 2013

Payload:

Connects to URLs/IPs, Steals information, Downloads files

Arrival Details

This spyware 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 downloaded from remote site(s) by the following malware:

  • TROJ_BANLOAD.KMZ

Installation

This spyware drops the following component file(s):

  • %SystemRoot%\DVD MakerShow\Sony\Enterprise\Modal\OUT\connect.cpl - also detected as TSPY_BANKER.WAV
  • %SystemRoot%\DVD MakerShow\Sony\Enterprise\Modal\OUT\connect.my - encrypted dll

It creates the following folders:

  • %SystemRoot%\DVD MakerShow\Sony\Enterprise\Modal\OUT
  • %SystemRoot%\Intel Core\Extreme\Graphics\Sample\Music\Basebrd\Bloqs
  • %SystemRoot%\Intel Core\Extreme\Graphics\Sample\Music\Basebrd\ShellBrd

Autostart Technique

This spyware creates the following registry entries to enable automatic execution of dropped component at every system startup:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
hkcmds = "%SystemRoot%\Intel Core\Extreme\Graphics\Sample\Music\Basebrd\ShellBrd\hkcmds.exe"

Other System Modifications

This spyware deletes the following folders:

  • %SystemRoot%Arquivos de programas (x64)\AVAST Software
  • %SystemRoot%Arquivos de programas (x64)\AVG
  • %SystemRoot%Arquivos de programas (x64)\AVG Secure Search
  • %SystemRoot%Arquivos de programas (x86)\AVAST Software
  • %SystemRoot%Arquivos de programas (x86)\AVG
  • %SystemRoot%Arquivos de programas (x86)\AVG Secure Search
  • %SystemRoot%Arquivos de programas\AVAST Software
  • %SystemRoot%Arquivos de programas\AVG
  • %SystemRoot%Arquivos de programas\AVG Secure Search
  • %SystemRoot%Arquivos de programas\Ad-Aware Antivirus
  • %SystemRoot%Arquivos de programas\Ad-Aware Antivirus
  • %SystemRoot%Arquivos de programas\Ask.com
  • %SystemRoot%Arquivos de programas\Avira
  • %SystemRoot%Arquivos de programas\ClamWin
  • %SystemRoot%Arquivos de programas\ESET
  • %SystemRoot%Arquivos de programas\Google\Google Toolbar
  • %SystemRoot%Arquivos de programas\Kaspersky Lab
  • %SystemRoot%Arquivos de programas\McAfee
  • %SystemRoot%Arquivos de programas\Microsoft Security Client
  • %SystemRoot%Arquivos de programas\Norton AntiVirus
  • %SystemRoot%Arquivos de programas\NortonInstaller
  • %SystemRoot%Arquivos de programas\Panda Security
  • %SystemRoot%Arquivos de programas\Trend Micro
  • %SystemRoot%Arquivos de programas\adawaretb
  • %SystemRoot%Documents and Settings\All Users\.clamwin
  • %SystemRoot%Documents and Settings\All Users\Dados de aplicativos\AVAST Software
  • %SystemRoot%Documents and Settings\All Users\Dados de aplicativos\AVG2013
  • %SystemRoot%Documents and Settings\All Users\Dados de aplicativos\Ad-Aware Antivirus
  • %SystemRoot%Documents and Settings\All Users\Dados de aplicativos\Ad-Aware Browsing Protection
  • %SystemRoot%Documents and Settings\All Users\Dados de aplicativos\Avira
  • %SystemRoot%Documents and Settings\All Users\Dados de aplicativos\ESET
  • %SystemRoot%Documents and Settings\All Users\Dados de aplicativos\Kaspersky Lab
  • %SystemRoot%Documents and Settings\All Users\Dados de aplicativos\MFAData
  • %SystemRoot%Documents and Settings\All Users\Dados de aplicativos\McAfee
  • %SystemRoot%Documents and Settings\All Users\Dados de aplicativos\Norton
  • %SystemRoot%Documents and Settings\All Users\Dados de aplicativos\NortonInstaller
  • %SystemRoot%Documents and Settings\All Users\Dados de aplicativos\Panda Security
  • %SystemRoot%Documents and Settings\All Users\Dados de aplicativos\Trend Micro
  • %SystemRoot%Documents and Settings\All Users\Dados de aplicativos\Windows Genuine Advantage
  • %SystemRoot%Documents and Settings\All Users\Dados de aplicativos\adawaretb
  • %SystemRoot%Program Files\Ad-Aware Antivirus
  • %SystemRoot%Program Files\Ask.com
  • %SystemRoot%Program Files\Avira
  • %SystemRoot%Program Files\ClamWin
  • %SystemRoot%Program Files\ESET
  • %SystemRoot%Program Files\Google\Google Toolbar
  • %SystemRoot%Program Files\Kaspersky Lab
  • %SystemRoot%Program Files\McAfee
  • %SystemRoot%Program Files\Microsoft Security Client
  • %SystemRoot%Program Files\Norton AntiVirus
  • %SystemRoot%Program Files\NortonInstaller
  • %SystemRoot%Program Files\Panda Security
  • %SystemRoot%Program Files\Trend Micro
  • %SystemRoot%Program Files\adawaretb
  • %SystemRoot%ProgramData\.clamwin
  • %SystemRoot%ProgramData\AVAST Software
  • %SystemRoot%ProgramData\AVG Secure Search
  • %SystemRoot%ProgramData\AVG2013
  • %SystemRoot%ProgramData\Ad-Aware Antivirus
  • %SystemRoot%ProgramData\Ad-Aware Browsing Protection
  • %SystemRoot%ProgramData\Avira
  • %SystemRoot%ProgramData\ESET
  • %SystemRoot%ProgramData\Kaspersky Lab
  • %SystemRoot%ProgramData\MFAData
  • %SystemRoot%ProgramData\McAfee
  • %SystemRoot%ProgramData\Norton
  • %SystemRoot%ProgramData\NortonInstaller
  • %SystemRoot%ProgramData\Panda Security
  • %SystemRoot%ProgramData\Trend Micro
  • %SystemRoot%ProgramData\Windows Genuine Advantage
  • %SystemRoot%ProgramData\adawaretb

It adds the following registry keys:

HKEY_CURRENT_USER\full

Download Routine

This spyware connects to the following website(s) to download and execute a malicious file:

  • http://www.{BLOCKED}urquerquer.net/mdl_sst/hkcmds.my

It saves the files it downloads using the following names:

  • %SystemRoot%\Intel Core\Extreme\Graphics\Sample\Music\Basebrd\ShellBrd\hkcmds.my

Stolen Information

This spyware saves the stolen information in the following file:

  • %SystemRoot%\Log_OUT.txt

It sends gathered information to a predetermined email address using its own Simple Mail Transfer Protocol (SMTP) engine.

NOTES:

After downloading the malicious file, the spyware then decrypts the downloaded file to create and execute the following:

  • %SystemRoot%\Intel Core\Extreme\Graphics\Sample\Music\Basebrd\ShellBrd\hkcmds.exe - detected as TSPY_BANKER.WAO

It searches the following files on the system to gather information:

  • *.dbx
  • *.wab
  • *.mbx
  • *.mai
  • *.eml
  • *.tbb
  • *.mbox

  SOLUTION

Minimum Scan Engine:

9.700

FIRST VSAPI PATTERN FILE:

10.342.07

FIRST VSAPI PATTERN DATE:

14 Oct 2013

VSAPI OPR PATTERN File:

10.343.00

VSAPI OPR PATTERN Date:

14 Oct 2013

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

Restart in Safe Mode

[ Learn More ]

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_CURRENT_USER
    • full

Step 4

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_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
    • hkcmds = "%SystemRoot%\Intel Core\Extreme\Graphics\Sample\Music\Basebrd\ShellBrd\hkcmds.exe"

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.  
  • %SystemRoot%\DVD MakerShow\Sony\Enterprise\Modal\OUT
  • %SystemRoot%\Intel Core\Extreme\Graphics\Sample\Music\Basebrd\Bloqs
  • %SystemRoot%\Intel Core\Extreme\Graphics\Sample\Music\Basebrd\ShellBrd

Step 6

Restart in normal mode and scan your computer with your Trend Micro product for files detected as TSPY_BANKER.WAV. 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 7

Restore this file from backup only Microsoft-related files will be restored. If this malware/grayware also deleted files related to programs that are not from Microsoft, please reinstall those programs on you computer again.


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