TSPY_BANCOS.KLEQ

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TypeSpyware

In the wild: No

Destructive: No

Language: English

Systems affected: Windows 98, ME, NT, 2000, XP, Server 2003

Encrypted: No

Overall risk rating:

Low

Reported detections:

Low

System  impact:

High

Information exposure:

High
 

Description:

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 drops a copy of itself and drops several non-malicious files. It also modifies a registry entry to enable its automatic execution at system startup.

This Trojan monitors the Internet Explorer (IE) activities of the affected system, specifically the address bar. It recreates a legitimate Web site with a spoofed login page if a user visits banking sites with certain strings in the address bar. The spoofed login overlaps the legitimate login area of the Web site, 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 Web site. 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.

This Trojan attempts to steal sensitive online banking information, such as user names and passwords. This routine risks the exposure of the users account information, which may then lead to the unauthorized use of the stolen data. It then sends the data via HTTP post to certain servers.

Description created:  Aug 3, 2009



TECHNICAL DETAILS



Initial samples received on:  Jul 29, 2009

File type: PE

Memory resident: Yes  

File size: 6,378,871 Bytes

Details:

Infection Points

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 and Autostart Technique

This Trojan modifies the following registry entry to enable its automatic execution at system startup:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Policies\Explorer\Run
bootstat = "{malware path and file name}"

Information Theft Routine

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

  • Bradesco Prime
  • Banco Bradesco Prime
  • Banco Ita
  • Banco Bradesco
  • INTERNETBANKINGCAIXA
  • Banco CEF
  • Banco Santander - Home Para Voc
  • Banco Santander
  • https://www2.bancobrasil.com.br/aapf/login.jsp
  • Banco do Brasil
  • Credicard Citi
  • Banco Credicard Citi
  • Portal BANCO REAL
  • Banco Real
  • Megadata
  • https://www.cetelem.com.br/wps/portal/cetelem/normal/NL/login
  • Cetelem
  • www.sicredi.com.br -
  • InfoBusca 3.
  • Infobusca
  • Banco Nossa Caixa S.A.
  • NossaCaixa
  • HSBC Brasil - P
  • Gravames

The spoofed login overlaps the legitimate login area of the Web site, 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 Web site. 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.

Attacked Entities

This Trojan attempts to retrieve information from the following list of banks/financial institutions:

  • Bradesco
  • Banco Itau
  • Caixa
  • Santander
  • Banco Brasil
  • Banco do Brasil
  • Credicard Citi
  • Banco Real
  • Megadata
  • Cetelem
  • Sicredi
  • InfoBusca
  • HSBC
  • Gravames

Stolen Information

This Trojan 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 then saves gathered information to any of the following text files, with file names depending on the bank where it stole the information:

  • c:\windows\bbrasil.txt
  • c:\windows\caixa.txt
  • c:\windows\cetelem.txt
  • c:\windows\credciti.txt
  • c:\windows\dsc.txt
  • c:\windows\dscprime.txt
  • c:\windows\gravames.txt
  • c:\windows\hsbc.txt
  • c:\windows\infobuscar.txt
  • c:\windows\ita.txt
  • c:\windows\itapersonal.txt
  • c:\windows\megadata.txt
  • c:\windows\nossacx.txt
  • c:\windows\real.txt
  • c:\windows\santa.txt
  • c:\windows\sicredi.txt

Drop Points

This Trojan sends the data it gathers to the following servers via HTTP post:

  • http://www.{BLOCKED}getaway.co.za/modules/mod_feed/enviador.php
  • http://www.{BLOCKED}.com.br/dfdsf/post.php
  • http://www.{BLOCKED}.co.za/components/com_poll/enviador.php

It may also send the gathered information to the following email address:

  • {BLOCKED}@gmail.com

Download Routine

During testing, this Trojan did not exhibit download routines.

Backdoor Channel

During testing, this Trojan did not exhibit backdoor routines.

Variant Information

This Trojan has the following SHA1 hash:

  • e66edbea3b43833eb96fd9b693319b6b2e483c34

This Trojan has the following MD5 hash:

  • 93246249f1ea0b2c260461be59d4f00a

Affected Platforms

This Trojan runs on Windows 98, ME, NT, 2000, XP, and Server 2003.


Analysis by:  Roland Dela Paz



SOLUTION


Minimum scan engine version needed: 8.700

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Important note: The "Minimum scan engine" refers to the earliest Trend Micro scan engine version guaranteed to detect this threat. However, Trend Micro strongly recommends that you update to the latest version in order to get comprehensive protection. Download the latest scan engine here.

Solution:

Identifying the Spyware Files

  1. Scan your computer with your Trend Micro antivirus product.
  2. Note the path and file name of all files detected as TSPY_BANCOS.KLEQ.

Trend Micro customers need to download the latest virus pattern file before scanning their computer. Other users can use Housecall, the Trend Micro online threat scanner.

Terminating the Spyware Process

This procedure terminates the running spyware process. You will need the name(s) of the file(s) detected earlier.

  1. Open Windows Task Manager.
    > On Windows 98 and ME, press
    CTRL%20ALT%20DELETE
    > On Windows NT, 2000, XP, and Server 2003, press
    CTRL%20SHIFT%20ESC, then click the Processes tab.
  2. In the list of running programs*, locate the spyware file(s) detected earlier.
  3. Select one of the detected files, then press either the End Task or the End Process button, depending on the version of Windows on your computer.
  4. Do the same for all detected spyware files in the list of running processes.
  5. To check if the spyware process has been terminated, close Task Manager, and then open it again.
  6. Close Task Manager.

*NOTE: On computers running Windows 98 and ME, Windows Task Manager may not show certain processes. You can use a third party process viewer such as Process Explorer to terminate the spyware process.

If the process you are looking for is not in the list displayed by Task Manager or Process Explorer, continue with the next solution procedure. If the spyware process is in the list displayed by either Task Manager or Process Explorer, but you are unable to terminate it, restart your computer in safe mode.

Removing Autostart Entries from the Registry

This solution deletes/modifies registry keys/entries added/modified by this spyware. Before performing the steps below, make sure you know how to back up the registry and how to restore it if a problem occurs. Refer to this Microsoft article for more information about modifying your computer's registry.

  1. Open Registry Editor. Click Start>Run, type REGEDIT, then press Enter.
  2. In the left panel, double-click the following:
    HKEY_CURRENT_USER\Software\Microsoft\Windows\
    CurrentVersion\Policies\Explorer\Run
  3. In the right panel, locate and delete the entry:
    bootstat = "{spyware path and file name}"
  4. Close Registry Editor.

Deleting the Spyware File(s)

  1. Right-click Start then click Search... or Find..., depending on the version of Windows you are running.
  2. In the Named input box, type:
    c:\windows\dscprime.txt
  3. In the Look In drop-down list, select My Computer, then press Enter.
  4. Once located, select the file then press SHIFT%20DELETE.
  5. Repeat steps 2 to 4 to delete the following file:
    • c:\windows\bbrasil.txt
    • c:\windows\caixa.txt
    • c:\windows\cetelem.txt
    • c:\windows\credciti.txt
    • c:\windows\dsc.txt
    • c:\windows\gravames.txt
    • c:\windows\hsbc.txt
    • c:\windows\infobuscar.txt
    • c:\windows\ita.txt
    • c:\windows\itapersonal.txt
    • c:\windows\megadata.txt
    • c:\windows\nossacx.txt
    • c:\windows\real.txt
    • c:\windows\santa.txt
    • c:\windows\sicredi.txt

Important Windows ME/XP Cleaning Instructions

Users running Windows ME and XP must disable System Restore to allow full scanning of infected computers.

Users running other Windows versions can proceed with the succeeding solution set(s).

Running Trend Micro Antivirus

Scan your computer with Trend Micro antivirus and delete files detected as TSPY_BANCOS.KLEQ. To do this, Trend Micro customers must download the latest virus pattern file and scan their computers. Other Internet users can use HouseCall, the Trend Micro online threat scanner.