Threat Encyclopedia

TSPY_BANKER.NJH

Publish date: June 26, 2015

ANALYSIS BY

Pearl Charlaine Espejo


ALIASES:

Mal/Banspy-I (Sophos); W32/Banspy.I!tr.pws (Fortinet); Win32:Banker-KIT [Trj] (Avast); Trojan-Banker.Win32.Banker (Ikarus); PWS-Banker.gen.b (McAfee)

PLATFORM:

Windows

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

  • Threat Type:Spyware

  • Destructiveness:No

  • Encrypted: No

  • 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 connects to certain websites to send and receive information.

TECHNICAL DETAILS

File Size:

9,794,048 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

22 Jun 2015

Payload:

Connects to URLs/IPs, Displays message/message boxes

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.

Installation

This spyware drops the following files:

  • %User Temp%\google_chrome

(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 copies of itself into the affected system:

  • %User Temp%\Google Chome.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.)

Other System Modifications

This spyware adds the following registry entries:

HKEY_CURRENT_USER
Google Chome = "%User Temp%\Google Chome.exe"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile\AuthorizedApplications\
List
{malware path}\{malware filename}.exe = "{malware path}\{malware filename}.exe:*:Enabled:google_chrome"

Process Termination

This spyware terminates the following processes if found running in the affected system's memory:

  • GbpSV.exe

Information Theft

This spyware targets the following websites:

  • Banco de Brasil
  • Caixa
  • HSBC Brasil
  • Facebook
  • PayPal
  • Pagseguro
  • Outlook

It gathers the following data:

  • Username
  • Password
  • Name
  • Data
  • CPF
  • Holder
  • Agency
  • Account

Other Details

This spyware connects to the following website to send and receive information:

  • http://www.{BLOCKED}e.com.br/cartel/banca.php
  • http://www.{BLOCKED}e.com.br/cartel/reg/{page}.php?value={value}

NOTES:

The value for {page} in the list of URLs it sends information to may contain any of the following:

  • outlook
  • facebook
  • pagseguro
  • pay
  • amarelo
  • preta
  • azul

This spyware executes the following command to allow TCP/UDP connections:

cmd.exe /C netsh firewall add allowedprogram "{malware path}\{malware file name}.exe" google_chrome ENABLE

It shows an error once the file is executed.

It monitors the user's keystrokes and mouse clicks to steal information.

It monitors the browser activities of the affected system, specifically the title bar. It recreates a legitimate website with a spoofed login page if a user visits websites with the following strings in the title bar:

  • Servicos Financeiros Pessoa Fisica | HSBC Brasil
  • Caixa - A vida pede mais que um banco
  • Entrar
  • PagSeguro: Venda pela internet e receba pagamentos online facilmente
  • Acesse Brasil - PayPal
  • Bem-vindo ao Facebook - acesse, cadastre-se ou saiba mais.

It produces a message once any of the said websites were accessed. If the user is using Google Chrome, is automatically terminated.

SOLUTION

Minimum Scan Engine:

9.750

FIRST VSAPI PATTERN FILE:

11.748.02

FIRST VSAPI PATTERN DATE:

22 Jun 2015

VSAPI OPR PATTERN File:

11.749.00

VSAPI OPR PATTERN Date:

23 Jun 2015

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 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
    • Google Chome = "%User Temp%\Google Chome.exe"
  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List
    • {malware path}\{malware filename}.exe = "{malware path}\{malware filename}.exe:*:Enabled:google_chrome"

Step 4

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.
  • %User Temp%\google_chrome

Step 5

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