BREX_MACOD.A

October 30, 2014
 Analysis by: Francis Xavier Antazo
 PLATFORM:

Windows

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

  • Threat Type: Adware

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes


  TECHNICAL DETAILS

File Size:

3,939 bytes

File Type:

JS

Memory Resident:

No

Initial Samples Received Date:

27 Oct 2014

Arrival Details

This adware may be downloaded from the following remote sites:

  • http://www.{BLOCKED}et.org/?frmprf56

Installation

This adware drops the following non-malicious files:

  • %AppDataLocal%\Google\Chrome\User Data\Default\Extensions\{random}\{extension version}\content.js
  • %AppDataLocal%\Google\Chrome\User Data\Default\Extensions\{random}\{extension version}\jquery.nicescroll.js
  • %AppDataLocal%\Google\Chrome\User Data\Default\Extensions\{random}\{extension version}\jquery.js
  • %AppDataLocal%\Google\Chrome\User Data\Default\Extensions\{random}\{extension version}\manifest.json
  • %AppDataLocal%\Google\Chrome\User Data\Default\Extensions\{random}\{extension version}\options.js
  • %AppDataLocal%\Google\Chrome\User Data\Default\Extensions\{random}\{extension version}\popup.js
  • %AppDataLocal%\Google\Chrome\User Data\Default\Extensions\{random}\{extension version}\options.html
  • %AppDataLocal%\Google\Chrome\User Data\Default\Extensions\{random}\{extension version}\popup.html
  • %AppDataLocal%\Google\Chrome\User Data\Default\Extensions\{random}\{extension version}\img\button_add.png
  • %AppDataLocal%\Google\Chrome\User Data\Default\Extensions\{random}\{extension version}\img\delete.png
  • %AppDataLocal%\Google\Chrome\User Data\Default\Extensions\{random}\{extension version}\img\detail.png
  • %AppDataLocal%\Google\Chrome\User Data\Default\Extensions\{random}\{extension version}\img\facebook.png
  • %AppDataLocal%\Google\Chrome\User Data\Default\Extensions\{random}\{extension version}\img\ico_16.png
  • %AppDataLocal%\Google\Chrome\User Data\Default\Extensions\{random}\{extension version}\img\ico_19.png
  • %AppDataLocal%\Google\Chrome\User Data\Default\Extensions\{random}\{extension version}\img\ico_48.png
  • %AppDataLocal%\Google\Chrome\User Data\Default\Extensions\{random}\{extension version}\img\ico_128.png
  • %AppDataLocal%\Google\Chrome\User Data\Default\Extensions\{random}\{extension version}\img\options.png
  • %AppDataLocal%\Google\Chrome\User Data\Default\Extensions\{random}\{extension version}\img\Thumbs.db
  • %AppDataLocal%\Google\Chrome\User Data\Default\Extensions\{random}\{extension version}\css\options.css
  • %AppDataLocal%\Google\Chrome\User Data\Default\Extensions\{random}\{extension version}\css\popup.css
  • %AppDataLocal%\Google\Chrome\User Data\Default\Extensions\{random}\{extension version}\css\read_button.css
  • %AppDataLocal%\Google\Chrome\User Data\Default\Extensions\{random}\{extension version}\_metadata\verified_contents.json

(Note: %AppDataLocal% is the Application Data folder found in Local Settings, where it is usually C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local 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.)

Other Details

This adware connects to the following possibly malicious URL:

  • http://{BLOCKED}tly.com/ads.php
  • http://{BLOCKED}bit.com/ads.php

  SOLUTION

Minimum Scan Engine:

9.700

FIRST VSAPI PATTERN FILE:

11.238.04

FIRST VSAPI PATTERN DATE:

27 Oct 2014

VSAPI OPR PATTERN File:

11.239.00

VSAPI OPR PATTERN Date:

28 Oct 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

Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.

Step 3

Close all opened browser windows

Step 4

Scan your computer with your Trend Micro product to delete files detected as BREX_MACOD.A. 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.

NOTES:

Please perform the following before scanning your computer with your Trend Micro product:

  • Click Tools.
  • Select Extensions.
  • Find Player for Youtube.
  • Click the Delete button and confirm the removal.


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