Analysis by: Alvin Bacani
ALIASES:

Troj/Banker-FWR (Sophos)

 PLATFORM:

Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

Infection Channel: Downloaded from the Internet, Dropped by other malware

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: 1,761,280 bytes
File Type: EXE
Memory Resident: Yes
Initial Samples Received Date: 02 Aug 2013
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.

Installation

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

  • %System Root%\ProgramData\Adobe.exe

(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.)

Autostart Technique

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

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
Microsoft Update 2.5 = %System Root%\ProgramData\Adobe.exe

Other System Modifications

This Trojan adds the following registry entries:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Policies\
Explorer
TaskbarNoThumbnail = "1"

Download Routine

This Trojan downloads an updated copy of itself from the following website(s):

  • http://www.{BLOCKED}0.com/denis/up.txt

Information Theft

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

  • Banco Bradesco
  • Banco Itau
  • Banco de Brasil
  • Banco Santander Brasil

Other Details

This Trojan connects to the following possibly malicious URL:

  • http://{BLOCKED}.{BLOCKED}.56.131/~infocont/n1lh4ck34r/nill/conte.php
  • {BLOCKED}.{BLOCKED}.56.133:45010

NOTES:

It monitors the following browsers, specifically the address bar or title bar, if the visited site is related to the targeted banks or financial institutions:

  • Internet Explorer
  • Mozilla Firefox
  • Google Chrome

  SOLUTION

Minimum Scan Engine: 9.300
FIRST VSAPI PATTERN FILE: 10.194.01
FIRST VSAPI PATTERN DATE: 02 Aug 2013
VSAPI OPR PATTERN File: 10.195.00
VSAPI OPR PATTERN Date: 02 Aug 2013

Step 1

Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.

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 Root%\ProgramData\Adobe.exe

Step 3

Search and delete these files

[ Learn More ]
There may be some 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 Root%\ProgramData\Adobe.exe

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_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
    • Microsoft Update 2.5 = %System Root%\ProgramData\Adobe.exe
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer
    • TaskbarNoThumbnail = "1"

Step 5

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