Analysis by: jasperm
 PLATFORM:

Windows 2000, XP, Server 2003

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users.

It redirects browsers to certain sites.

  TECHNICAL DETAILS

File Size: 3,872 bytes
File Type: Script
Memory Resident: No
Initial Samples Received Date: 22 Sep 2010
Payload: Downloads files

Arrival Details

This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users.

Other Details

This Trojan redirects browsers to the following sites:

  • http://{BLOCKED}is.cz/x.html - detected as Mal_Hifrm

It does the following:

  • It uses meta-refresh tag to redirect users to the said malicious website.

  SOLUTION

Minimum Scan Engine: 8.900
VSAPI PATTERN File: 7.483.80
VSAPI PATTERN Date: 22 Sep 2010
VSAPI PATTERN Date: 9/22/2010 12:00:00 AM

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

Remove malware files dropped/downloaded by JS_WNDRED.BG

Step 3

Scan your computer with your Trend Micro product to delete files detected as JS_WNDRED.BG. 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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