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TSPY_BANKER.XXWH

February 09, 2015
 Analysis by: Francis Xavier Antazo
 ALIASES:

a variant of Win32/Spy.Banker.ABEO trojan (NOD32), W32/Banker.ABEO!tr (FORTINET )

 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: No

  • 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 saves downloaded files into the said created folder.

It steals certain information from the system and/or the user.

  TECHNICAL DETAILS

File Size:

552,960 bytes

Memory Resident:

Yes

Initial Samples Received Date:

24 Jan 2015

Payload:

Collects system information, Downloads files

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 creates the following folders:

  • %Application Data%\{Current date using the format: ddmmyyyy}

(Note: %Application Data% is the Application Data folder, where it usually is C:\Documents and Settings\{user name}\Application Data on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Roaming on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)

Download Routine

This Trojan downloads the file from the following URL and renames the file when stored in the affected system:

  • http://{BLOCKED}fronteira.net/paris/ScheduleWMI.php
  • http://{BLOCKED}emfronteira.net/paris/storagewmi.js

It saves the files it downloads using the following names:

  • %Application Data%\{Current date using the format: ddmmyyyy}\ScheduleWMI.exe
  • %Application Data%\{Current date using the format: ddmmyyyy}\storagewmi.sys

(Note: %Application Data% is the Application Data folder, where it usually is C:\Documents and Settings\{user name}\Application Data on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Roaming on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)

It saves downloaded files into the said created folder.

Information Theft

This Trojan steals the following information:

  • Computer Name
  • Product Type
  • Processor information
  • Keystroke Logs

Other Details

This Trojan requires the following additional components to properly run:

  • %Application Data%\{Current date using the format: ddmmyyyy}\ScheduleWMI.exe
  • %Application Data%\{Current date using the format: ddmmyyyy}\storagewmi.sys

(Note: %Application Data% is the Application Data folder, where it usually is C:\Documents and Settings\{user name}\Application Data on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Roaming on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)

  SOLUTION

Minimum Scan Engine:

9.700

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

Search and delete these folders

[ Learn More ]
Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden folders in the search result.  
  • %Application Data%\{Current date using the format: ddmmyyyy}

Step 3

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