Analysis by: Odessy Silva
ALIASES:

Trojan-Banker.Win32.ChePro.iuc (Kaspersky), W32/Banload.TFP!tr.dldr (Fortinet), Trojan-Downloader.Win32.Banload.rxb (v) (Sunbelt)

 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

Canal de infección Downloaded from the Internet

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 accesses websites to download files. This action allows this malware to possibly add other malware on the affected computer. It executes downloaded files whose malicious routines are exhibited by the affected system.

  TECHNICAL DETAILS

Tamaño del archivo 201,728 bytes
Tipo de archivo Other
Residente en memoria No
Fecha de recepción de las muestras iniciales 10 May 2014
Carga útil Displays message/message boxes, Connects to URLs/IPs, 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 displays the following fake error messages:


Download Routine

This Trojan accesses websites to download the following files:

  • http://{BLOCKED}.{BLOCKED}.67.171/pasta1/gbplugin.jpg
  • http://{BLOCKED}.{BLOCKED}.67.171/pasta1/D63A5E3246A.jpg
  • http://{BLOCKED}.{BLOCKED}.67.171/pasta1/E174D3044694.jpg

It saves the files it downloads using the following names:

  • %User Temp%\{hostname}{9 random characters}.cpl
  • %User Temp%\{hostname}{9 random characters}.dll
  • %User Temp%\{hostname}{9 random characters}bl.dll

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.)

It executes downloaded files :

  • %User Temp%\{hostname}{9 random characters}.cpl

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.)

whose malicious routines are exhibited by the affected system.

NOTES:

This Trojan hides the initially executed copy.

  SOLUTION

Motor de exploración mínimo 9.700
Primer archivo de patrones de VSAPI 10.786.01
Primera fecha de publicación de patrones de VSAPI 10 May 2014
Versión de patrones OPR de VSAPI 10.787.00
Fecha de publicación de patrones OPR de VSAPI 10 May 2014

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 this file

[ 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.  
  • %User Temp%\{hostname}{random 9 characters}.cpl
  • %User Temp%\{hostname}{random 9 characters}.dll
  • %User Temp%\{hostname}{random 9 characters}bl.dll

Step 3

Scan your computer with your Trend Micro product to delete files detected as TROJ_BANLOAD.WEL. 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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