Analysis by: Sabrina Lei Sioting
 PLATFORM:

Windows 2000, XP, Server 2003

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

  • 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 information, such as user names and passwords, used when logging into certain banking or finance-related websites.

  TECHNICAL DETAILS

File Size: 2,113,024 bytes
File Type: PE
Memory Resident: Yes
Initial Samples Received Date: 07 Aug 2010

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.

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:

  • Caixa E-Banking
  • http://www.banif.pt
  • http://www.credito-agricola.pt/CA
  • https://caixadirecta.cgd.pt/CaixaDirecta/loginStart.do
  • https://caixaebanking.cgd.pt/cebApp/Login_input.action
  • https://www.bpinetempresas.pt/SIGNON/signon.asp

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 information from the following banks and/or other financial institutions:

  • BPI Net Empresas
  • Banif
  • Caixa
  • Crédito Agrícola

Stolen Information

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

  • http://{BLOCKED}.{BLOCKED}.95.10/contador.php

Other Details

This Trojan did not exhibit backdoor routines during testing.

Variant Information

This Trojan has the following MD5 hashes:

  • 735d895409f7d7e1ac279d67d971a235

It has the following SHA1 hashes:

  • 64bfd7af2007e4f0980d7813116dcdeb59a2d9cb

  SOLUTION

Minimum Scan Engine: 8.900
VSAPI PATTERN File: 07.366.14
VSAPI PATTERN Date: 07 Aug 2010
VSAPI PATTERN Date: 8/7/2010 12:00:00 AM

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

Scan your computer with your Trend Micro product and note files detected as TROJ_BANKER.KYJ

Step 3

Terminate the malware/grayware/spyware process:

[ Learn More ]
  • For Windows 98 and ME users, Windows Task Manager may not display all running processes. In this case, please use a third-party process viewer, preferably Process Explorer, to terminate the malware/grayware/spyware file. You may download the said tool here.
  • 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.
  • If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.

    • Step 4

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