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TROJ_BANKER.JTB

October 08, 2012
 Modified by: Kathleen Notario
 PLATFORM:

Windows 2000, XP, Server 2003

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:

  • 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 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:

9,040,384 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

26 Oct 2008

Payload:

Steals information

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:

  • C:\Documents and Settings\All Users\Application Data\{malware file name}.exe

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
{malware file name}.exe = C:\Documents and Settings\All Users\Application Data\{malware file name}.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:

  • https://www.santandernet.com.br/default.asp?txtAgencia=
  • https://www2.rural.com.br/RuralIBank/login_conta.jsp?acao=cadastraUsuario
  • https://wwwss.bradesco.com.br/scripts/ib2k1.dll/
  • https://wwwss.bradesco.com.br/scripts/ib2k1.dll/LOGIN
  • https://wwwss.bradesc .com.br/scripts/ib2k1.dll/TAC/VRFSENHAATUAL

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 Rural
  • Banco Santander
  • Bradesco

Drop Points

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

  • {BLOCKED}rteza@uol.com.br
  • {BLOCKED}010@uol.com.br
  • {BLOCKED}detudo@uol.com.br
  • {BLOCKED}i5090@gmail.com

Variant Information

This spyware has the following MD5 hashes:

  • 42b21e4a5c1a4adc9ac98f3d99c5960c

It has the following SHA1 hashes:

  • e1ab7f4f8f867d038c5b67b3359731b41375e768

  SOLUTION

Minimum Scan Engine:

8.900

FIRST VSAPI PATTERN FILE:

6.802.07

FIRST VSAPI PATTERN DATE:

25 Jan 2010

VSAPI OPR PATTERN File:

7.491.00

VSAPI OPR PATTERN Date:

25 Sep 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

Identify and terminate files detected as TROJ_BANKER.JTB

[ Learn More ]
  1. If the detected file is displayed in either Windows Task Manager or Process Explorer but you cannot delete it, restart your computer in safe mode. To do this, refer to this link for the complete steps.
  2. If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.

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
    • {malware file name}.exe=C:\Documents and Settings\All Users\Application Data\{malware file name}.exe

Step 4

Scan your computer with your Trend Micro product to delete files detected as TROJ_BANKER.JTB. 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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