TSPY_BANKER.MEX

This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

It attempts to steal sensitive online banking information, such as user names and passwords. This routine risks the exposure of the user's account information, which may then lead to the unauthorized use of the stolen data. It attempts to steal information, such as user names and passwords, used when logging into certain banking or finance-related websites.

Arrival Details

This Trojan 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 Trojan drops the following copies of itself into the affected system:

• %User Profile%\GraphicsAcelerator3D.exe

(Note: %User Profile% is the current user's profile folder, which is usually C:\Windows\Profiles\{user name} on Windows 98 and ME, C:\WINNT\Profiles\{user name} on Windows NT, and C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003.)

Autostart Technique

This Trojan adds the following registry entries to enable its automatic execution at every system startup:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
3D Accelerator = %User Profile%\GraphicsAcelerator3D.exe

Dropping Routine

This Trojan drops the following files:

• %User Profile%\NuevoUpdate.fcd

(Note: %User Profile% is the current user's profile folder, which is usually C:\Windows\Profiles\{user name} on Windows 98 and ME, C:\WINNT\Profiles\{user name} on Windows NT, and C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003.)

Information Theft

This Trojan monitors the Internet Explorer (IE) activities of the affected system, specifically the address bar or title bar. It recreates a legitimate website with a spoofed login page if a user visits banking sites with the following strings in the address bar or title bar:

• Banco Ita
• Banco Unibanco
• Bradesco - Redirect Bradesco Pri
• Caixa Economica Federal
• Portal B a n c o Real - ABN AMRO - Microsoft Internet Explorer
• Portal BANCO REAL
• a, o INTERNET BANKING CAIXA agora solicita sua Assinatura Eletr
• https://www2.bancobrasil.com.br/aapf/login.jsp?aapf.IDH=sim&perfil=1

The spoofed login overlaps the legitimate login area of the website, thus tricking the user into thinking that it is part of the IE window. The spoofed login page is located in a fixed area of the legitimate website. The said routine tricks the user into giving out sensitive account-related information. It then logs keystrokes entered by the user in the user name and password fields of the spoofed login page.

It attempts to steal sensitive online banking information, such as user names and passwords. This routine risks the exposure of the user's account information, which may then lead to the unauthorized use of the stolen data.

It attempts to steal information from the following banks and/or other financial institutions:

• Banco Itau
• Banco Real
• Banco do Brasil
• Bradesco
• Caixa
• Caixa Economica Federal
• Unibanco

Drop Points

This Trojan sends the information it gathers to the following email addresses:

• {BLOCKED}ta2010@yahoo.com.br

Variant Information

This Trojan has the following MD5 hashes:

• 9261f994561f4186a366d3a79570bf60

It has the following SHA1 hashes:

• da0729be697c2230afa37b42465cf40aed31878e