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JS_OBFUSCAT.SMF

October 09, 2012
 Analysis by: Karl Dominguez
 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

This is the Trend Micro detection for Web pages that were compromised through the insertion of a certain malicious script. Once a user visits an affected Web page, this HTML script launches a hidden IFRAME that connects to a malicious URL. It redirects browsers to certain sites. However, as of this writing, the said sites are inaccessible.

  TECHNICAL DETAILS

File Size:

Varies

File Type:

HTML, HTM

Initial Samples Received Date:

05 May 2011

Payload:

Connects to URLs/IPs

Other Details

This is the Trend Micro detection for Web pages that were compromised through the insertion of a certain malicious script.

Once a user visits an affected Web page, this HTML script launches a hidden IFRAME that connects to a malicious URL.

It redirects browsers to the following sites:

  • http://{BLOCKED}er.com/{BLOCKED}6.php
  • http://{BLOCKED}ry.com/{BLOCKED}7.php
  • http://{BLOCKED}te.com/{BLOCKED}t9.php
  • http://{BLOCKED}ri.com/{BLOCKED}t9.php
  • http://{BLOCKED}ar.com/{BLOCKED}t10.php
  • http://{BLOCKED}rj.com/{BLOCKED}t11.php
  • http://{BLOCKED}ch.com/{BLOCKED}13.php

However, as of this writing, the said sites are inaccessible.

  SOLUTION

Minimum Scan Engine:

8.900

FIRST VSAPI PATTERN FILE:

8.137.00

FIRST VSAPI PATTERN DATE:

05 May 2011

Step 1

For Windows XP and Windows Server 2003 users, before doing any scans, please make sure you disable System Restore to allow full scanning of your computer.

Step 2

Close all opened browser windows

Step 3

Scan your computer with your Trend Micro product to delete files detected as JS_OBFUSCAT.SMF. 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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