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TSPY_BANCOS.ZZA

October 08, 2012
 Analysis by: Sabrina Lei Sioting
 PLATFORM:

Windows 2000, XP, Server 2003

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

  • Threat Type: Spyware

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW


This spyware attempts to steal information, such as user names and passwords, used when logging into certain banking or finance-related websites.

  TECHNICAL DETAILS

File Size:

3,994,112 bytes

File Type:

PE

Memory Resident:

Yes

Initial Samples Received Date:

17 Sep 2010

Installation

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

  • %System%\avg.exe

(Note: %System% is the Windows system folder, which is usually C:\Windows\System on Windows 98 and ME, C:\WINNT\System32 on Windows NT and 2000, or C:\Windows\System32 on Windows XP and Server 2003.)

It drops the following files:

  • %System%\rgr.sys - detected by Trend Micro as TROJ_BANKER.LRF

(Note: %System% is the Windows system folder, which is usually C:\Windows\System on Windows 98 and ME, C:\WINNT\System32 on Windows NT and 2000, or C:\Windows\System32 on Windows XP and Server 2003.)

Autostart Technique

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

HKEY_LOCAL_MACHINE
@ = %System%\\avg.exe

Information Theft

This spyware monitors the Internet Explorer (IE) activities of the affected system, specifically the address 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 and/or title bar:

  • Banco Bradesco S/A
  • Banco Do Bradesco
  • Banco Santander
  • Banespa
  • Banrisul
  • Bradesco Corporate
  • Bradesco Empresas
  • Bradesco Prime
  • Bradeso Net Empresa
  • Itau iToken
  • Portal Internet Banrisul
  • Santander Banespa
  • Unibanco
  • http://bradesconetempresa.com.br
  • http://www.banrisul.com.br
  • http://www.cellcard.com.br
  • http://www.corporatebradesco.com.br/
  • http://www.itau.com
  • http://www.itau.com.br/index.htm
  • http://www.quidam.com.br/content/home/
  • http://www.serasa.com.br
  • http://www.unibanco.com.br
  • http://www2.americanexpress.com.br
  • https://home.americanexpress.com
  • https://inst.itaucard.com.br
  • https://internetbanking.caixa.gov.br
  • https://internetbanking.caixa.gov.br/siwinstatic/htm/saibaMaisCadMaq/saibaMaisCompleto.htm
  • https://www.americanexpress.com
  • https://www.credicard.com.br
  • https://www.paypal.com/br

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

  • American Express
  • Banco Banespa
  • Banco Bradesco
  • Banco Caixa
  • Banco Itau
  • Banco Santander
  • Banco Seresa
  • Banco do Bradesco
  • Banrisul
  • Cellcard
  • Paypal
  • Quidam
  • Unibanco

Stolen Information

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

  • http://www.{BLOCKED}x.com.br/uploads/galeria.php

Variant Information

This spyware has the following MD5 hashes:

  • 84bfab5f4253c2f362e7ca9d5b1b1e6c

It has the following SHA1 hashes:

  • 22d6639db87ccd7d83a963422cce1d63c446513c

  SOLUTION

Minimum Scan Engine:

8.900

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

Terminate a malware/grayware process

[ Learn More ]

*Note: If the detected process is not displayed in theWindows Task Manager, continue doing the next steps.

    • %System%\avg.exe

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_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
    • @ = %System%\avg.exe

Step 4

Search and delete this file

[ 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.
  • %System%\rgr.sys

Step 5

Scan your computer with your Trend Micro product to delete files detected as TSPY_BANCOS.ZZA. 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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