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TROJ_BANCOS.XCBE

December 05, 2014
 Analysis by: Cris Nowell Pantanilla
 PLATFORM:

Windows

 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:

Spammed via email

This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users.

As of this writing, the said sites are inaccessible.

  TECHNICAL DETAILS

File Size:

1080832 bytes

File Type:

DLL

Memory Resident:

Yes

Initial Samples Received Date:

01 Dec 2014

Payload:

Connects to URLs/IPs

Arrival Details

This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users.

Installation

This Trojan drops the following files:

  • %User Temp%\image.gif

(Note: %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp 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 injects codes into the following process(es):

  • svchost.exe
  • iexplore.exe

Download Routine

This Trojan connects to the following website(s) to download and execute a malicious file:

  • http://{BLOCKED}.{BLOCKED}.201.89/php_info/cgi-server/hostmediacenter.com.br/Evolution.jar
  • http://{BLOCKED}.{BLOCKED}.201.89/php_info/cgi-server/hostmediacenter.com.br/look.jar
  • http://{BLOCKED}.{BLOCKED}.201.89/php_info/cgi-server/hostmediacenter.com.br/ExtrMail.jar
  • http://{BLOCKED}.{BLOCKED}.201.89/php_info/cgi-server/hostmediacenter.com.br/Boot.jar
  • http://{BLOCKED}.{BLOCKED}.201.89/php_info/cgi-server/hostmediacenter.com.br/BootMemori.jar

As of this writing, the said sites are inaccessible.

  SOLUTION

Minimum Scan Engine:

9.700

FIRST VSAPI PATTERN FILE:

11.316.02

FIRST VSAPI PATTERN DATE:

01 Dec 2014

VSAPI OPR PATTERN File:

11.317.00

VSAPI OPR PATTERN Date:

02 Dec 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%\image.gif

Step 3

Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_BANCOS.XCBE. 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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