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BREX_FEBIPOS.OKZ

September 08, 2014
 Analysis by: Rika Joi Gregorio
 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: Backdoor

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Downloaded from the Internet, Dropped by other malware


This backdoor arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites. It arrives as a component bundled with malware/grayware packages. It may be manually installed by a user.

It executes commands from a remote malicious user, effectively compromising the affected system. It connects to a website to send and receive information.

  TECHNICAL DETAILS

File Size:

1,151,480 bytes

File Type:

Other

Memory Resident:

Yes

Initial Samples Received Date:

07 Sep 2014

Payload:

Connects to URLs/IPs, Compromises system security

Arrival Details

This backdoor arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

It arrives as a component bundled with malware/grayware packages.

It may be manually installed by a user.

Backdoor Routine

This backdoor executes the following commands from a remote malicious user:

  • Update status (Facebook)
  • Post comments (Facebook)
  • Post to friend's wall (Facebook)
  • Like pages (Facebook)
  • Follow account (Facebook)
  • Send messages and links via chat (Facebook)
  • Post messages (Facebook)
  • Tagged friends (Facebook)
  • Join a group (Facebook)
  • Delete cookies

It connects to the following websites to send and receive information:

  • {BLOCKED}s.{BLOCKED}g.us/widget/brasilgeral.pnh
  • {BLOCKED}s.{BLOCKED}g.us/widget/fbbrstoreo.pnh
  • http://{BLOCKED}rais.info/sqlvarbr.php
  • http://{BLOCKED}rais.info/decaptcha/makejpg.php
  • http://{BLOCKED}rais.info/decaptcha/xtracpnovo.php
  • http://{BLOCKED}rais.info/error/report.php
  • http://{BLOCKED}rais.info/linkpool/insertlink.php

NOTES:
This backdoor injects in pages which contains the following strings:

  • *://*.facebook.com/*
  • *://*.twitter.com/*
  • *://*.google.com/*
  • *://*.youtube.com/*

  SOLUTION

Minimum Scan Engine:

9.700

FIRST VSAPI PATTERN FILE:

11.134.02

FIRST VSAPI PATTERN DATE:

07 Sep 2014

VSAPI OPR PATTERN File:

11.135.00

VSAPI OPR PATTERN Date:

08 Sep 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

Close all opened browser windows

Step 3

Scan your computer with your Trend Micro product to delete files detected as BREX_FEBIPOS.OKZ. 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:

Kindly perform this step before proceeding to Step 2:

Click the Chrome menu on the browser toolbar.

1. Click Tools.

2. Select Extensions.

3. Find Picture in Picture HD 0.3.1

4. Click the Remove from Chrome button and confirm the removal.


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