Analysis by: Kathleen Notario
 PLATFORM:

Windows 2000, XP, Server 2003

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

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.

  TECHNICAL DETAILS

File Size: 15,130,112 bytes
File Type: EXE
Memory Resident: Yes
Initial Samples Received Date: 11 Aug 2010
Payload: Steals information

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.

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
ctfmon = {malware path and filename}

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:

  • INTERNETBANKINGCAIXAWIN
  • Portal BANCO REAL - Windows Internet Explorer
  • bradesco.com.br
  • itau.com.br
  • santander.com.br

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 Real
  • Bradesco
  • Caixa
  • Itau
  • Santander

Stolen Information

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

  • {BLOCKED}gotas.com.br/contador.php

Variant Information

This Trojan has the following MD5 hashes:

  • 14751eb4a82ee2cfa7010cbcfbbd34fe

It has the following SHA1 hashes:

  • 5f85b6379bffa19219d1f2674530b564aec71d7b

  SOLUTION

Minimum Scan Engine: 8.900
VSAPI OPR PATTERN File: 7.378.09
VSAPI OPR PATTERN Date: 12 Aug 2010

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
    • ctfmon={malware path and filename}

Step 3

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