Analysis by: Christopher Daniel So
 Modified by: Rhena Inocencio
ALIASES:

JS/Downloader.gen (McAfee), Trojan Horse (Symantec), HTML/Refresh.AG trojan (Nod32), Trojan.HTML.Generic (v) (Sunbelt), Troj/Iframe-EZ (Sophos)

 PLATFORM:

Windows 2000, Windows, XP, Windows Server 2003

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

Infection Channel: Downloaded from the Internet

This Trojan executes when a user accesses certain websites where it is hosted.

This is the Trend Micro detection for Web pages that were compromised through the insertion of a certain malicious script. Once a compromised site is visited, the user is redirected to a certain malicious site. However, as of this writing, the said sites are inaccessible.

  TECHNICAL DETAILS

File Size: Varies
File Type: HTML, HTM
Memory Resident: No
Initial Samples Received Date: 06 Dec 2011
Payload: Downloads files

Arrival Details

This Trojan executes when a user accesses certain websites where it is hosted.

Other Details

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

Once a compromised site is visited, the user is redirected to the following malicious site:

  • http://{BLOCKED}ntive.in/x.html
  • http://{BLOCKED}lco.cz.cc/scanner10/?afid=24
  • http://{BLOCKED}lopi.cz.cc/scanner10/?afid=24

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

NOTES:

This Trojan redirects users to the said sites to possibly download other malicious files.

  SOLUTION

Minimum Scan Engine: 9.200
FIRST VSAPI PATTERN FILE: 8.628.03
FIRST VSAPI PATTERN DATE: 06 Dec 2011
VSAPI OPR PATTERN File: 8.629.00
VSAPI OPR PATTERN Date: 07 Dec 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 HTML_REDIR.MC. 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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