Analysis by: Jaime Benigno Reyes
 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:

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

Infection Channel: Downloaded from the Internet

This Trojan arrives as a component bundled with malware/grayware packages. It may be manually installed by a user.

  TECHNICAL DETAILS

File Size: Varies
File Type: Script
Initial Samples Received Date: 10 Apr 2013
Payload: Connects to URLs/IPs

Arrival Details

This Trojan arrives as a component bundled with malware/grayware packages.

It may be downloaded from the following remote site(s):

  • http://www.{BLOCKED}em.biz/sosyalag.xpi
  • http://www.{BLOCKED}ike.com/sosyalag.xpi
  • http://www.{BLOCKED}resim.com/sosyalag.xpi
  • http://www.{BLOCKED}r.com/sosyalag.xpi
  • http://www.{BLOCKED}ayim.com/sosyalag.xpi
  • http://{BLOCKED}ked.com/sosyalag.xpi

It may be manually installed by a user.

NOTES:

This malware is a component of a Mozilla Firefox add-on that disguises itself as The Social Networks 1.5. The add-on package sosyalag.xpi is also detected as JS_KOOBFACE.IG.

Each time Mozilla Firefox connects to facebook.com, the malware connects to the following sites:

  • http://www.{BLOCKED}medya.biz/bakgel.php
  • http://www.{BLOCKED}medya.biz/askfm.php
  • http://www.{BLOCKED}medya.biz/post.php
  • http://www.{BLOCKED}medya.biz/post.js
  • http://www.{BLOCKED}medya.biz/youtube.php
  • http://{BLOCKED}medya.biz/firefox.js
  • http://www.{BLOCKED}iniarttir.net/pro.php
  • http://www.{BLOCKED}ike.com/bakgel.php

It does the following without the user's consent:

  • Like pages in Facebook
  • Follow profiles/people in Facebook
  • Follow Twitter accounts
  • Retweet posts in Twitter
  • Add favorite tweets in Twitter

  SOLUTION

Minimum Scan Engine: 9.300
FIRST VSAPI PATTERN FILE: 9.848.03
FIRST VSAPI PATTERN DATE: 10 Apr 2013
VSAPI OPR PATTERN File: 9.849.00
VSAPI OPR PATTERN Date: 11 Apr 2013

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

Scan your computer with your Trend Micro product to delete files detected as JS_KOOBFACE.IG. 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:

Note:Uninstall the Mozilla Firefox add-on The Social Networks 1.5. You may refer to the following Mozilla Support page for uninstall instructions:


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