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TSPY_BANKER.MFC

October 08, 2012
 Analysis by: Kathleen Notario
 PLATFORM:

Windows 98, ME, NT, 2000, XP, Server 2003

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW


This Trojan may be dropped by other malware. It may be unknowingly downloaded by a user while visiting malicious websites.

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.

  TECHNICAL DETAILS

File Size:

10,620,928 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

04 Aug 2010

Arrival Details

This Trojan may be dropped by other malware.

It may be unknowingly downloaded by a user while visiting malicious websites.

Installation

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

  • %Program Files%\SynTPEnh.exe

(Note: %Program Files% is the default Program Files folder, usually C:\Program Files.)

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
\\SynTPEnh = %Program Files%\SynTPEnh.exe

Dropping Routine

This Trojan drops the following files:

  • %Windows%\windir.ini
  • %Windows%\pdtn.ini

(Note: %Windows% is the Windows folder, which is usually C:\Windows or C:\WINNT.)

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:

  • BRADESCO.COM
  • Banco Ita - Feito Para Voc
  • Banco Santander
  • Portal Cetelem Brasil
  • https://www2.bancobrasil.com.br/aapf/login.jsp
  • https://www2.bancobrasil.com.br/aapf/login.jsp?aapf.IDH=sim

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 Santander
  • Banco do Brasil
  • Bradesco
  • Portal Cetelem Brasil

Stolen Information

This Trojan sends the gathered information via HTTP POST to the following URL:

  • http://{BLOCKED}ndas.dominiotemporario.com/index.php

It sends the data it gathers to the following email addresses via SMTP:

  • {BLOCKED}iano101010@gmail.com
  • {BLOCKED}iano102030@gmail.com
  • {BLOCKED}iano2009@gmail.com

Variant Information

This Trojan has the following MD5 hashes:

  • 39e6489c68d5ba871e623dadb1a42374

It has the following SHA1 hashes:

  • 97cd3ae5a74acc5eadab9ab63d0a1e7f3e5e58a2

  SOLUTION

Minimum Scan Engine:

8.900

VSAPI PATTERN File:

7.362.04

VSAPI PATTERN Date:

04 Aug 2010

VSAPI PATTERN Date:

8/4/2010 12:00:00 AM

Step 1

For Windows XP and Windows Server 2003 users, before doing any scans, please make sure you disable System Restore to allow full scanning of your computer.

Step 2

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_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
    • \SynTPEnh=%Program Files%\SynTPEnh.exe

Step 3

Search and delete these files

[ Learn More ]
There may be some component 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. DATA_GENERIC
Note: To do a search for the following files, right-click Start then click Search... or Find..., depending on the version of Windows you are running. For each file to be deleted, type its file name in the Named input box. In the Look In drop-down list, select My Computer, then press Enter.
  • Once located, select the file then press SHIFT+DELETE to permanently delete the file.
  • Repeat the said steps for all files listed.

    • Step 4

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