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TSPY_BANKER.MNE

October 08, 2012
 Analysis by: Kathleen Notario
 PLATFORM:

Windows 2000, XP, Server 2003

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

  • Threat Type: Spyware

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

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

It executes the dropped file(s). As a result, malicious routines of the dropped files are exhibited on the affected system.

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:

3,585,024 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

23 Sep 2010

Payload:

Drops files

Arrival Details

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

  • %Windows%\Tcp_IP.exe

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

Autostart Technique

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

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
(default) = %Windows%\Tcp_IP.exe

Other System Modifications

This spyware adds the following registry keys:

HKEY_CURRENT_USER\Tcp_IP

It adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\policies\
system
EnableLUA = 0

Dropping Routine

This spyware drops the following files:

  • %Windows%\USBS.log - non-malicious file
  • %System%\drivers\regtoro.sys - detected as TSPY_BANKER.ROZ

(Note: %Windows% is the Windows folder, which is usually C:\Windows or C:\WINNT.. %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 executes the dropped file(s). As a result, malicious routines of the dropped files are exhibited on the affected system.

Information Theft

This spyware 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:

  • Banrisul - Internet Explorer
  • Portal Internet Banrisul
  • [bb.com.br] - Mozilla Firefox
  • http://www.bb.com.br/portalbb/home23,116,116,1,1,1,1.bb
  • http://www.bradesco.com.br/
  • http://www.itau.com.br/
  • http://www.itaupersonnalite.com.br/index.jsp
  • http://www.itauprivatebank.com.br/privatebank/default.aspx
  • http://www.santander.com.br
  • http://www.ser saexperian.com.br/
  • https://internetbanking.caixa.gov.br/SIIBC/index.processa
  • https://internetbanking.caixa.gov.br/SIIBC/siwinCtrl
  • https://www.caixa.gov.br/_newredirect/barra/r_IBC.asp
  • https://www.cetelem.com.br/wps/portal/cetelem/normal/NL/login
  • https://www2.bancobrasil.com.br/aapf/login.jsp?aapf.IDH=sim&perfil=1
  • https://wwwss.bradesco.com.br/scripts/ib2k1.dll/LOGIN?AGN=

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
  • Banrisul
  • Bradesco
  • CAIXA
  • Cetelem
  • Serasa Experian

Stolen Information

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

  • http://{BLOCKED}ts.dominiotemporario.com/infect.php
  • http://www.{BLOCKED}acanarana.com/imagnes/sis/estudo/faculdade/net.php

Drop Points

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

  • {BLOCKED}trigo2008@hotmail.com
  • {BLOCKED}y.r0n1@hotmail.com

Variant Information

This spyware has the following MD5 hashes:

  • 5a483e79b3a7eb54ff4bb80411094347

It has the following SHA1 hashes:

  • 2ad000252dff06408ab2c22a2c9195beecc160df

  SOLUTION

Minimum Scan Engine:

8.900

VSAPI PATTERN File:

currently processing

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

Remove malware files dropped/downloaded by TSPY_BANKER.MNE

     TSPY_BANKER.ROZ

Step 3

Restart in Safe Mode

[ Learn More ]

Step 4

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
    • (default)=%Windows%\Tcp_IP.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\system
    • EnableLUA=0

Step 5

Delete this registry key

[ 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_CURRENT_USER
    • Tcp_IP

Step 6

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. %Windows%\USBS.log 

Step 7

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