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 may be unknowingly downloaded by a user while visiting malicious websites.

  TECHNICAL DETAILS

File Size: 11,893 bytes
File Type: Script
Memory Resident: No
Initial Samples Received Date: 23 Sep 2010
Payload: Downloads files

Arrival Details

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

It may be unknowingly downloaded by a user while visiting malicious websites.

Download Routine

This Trojan accesses the following websites to download files:

  • http://{BLOCKED}onor.com/iframefile.js - detected as JS_IFRAME.AVQ

  SOLUTION

Minimum Scan Engine: 8.900
VSAPI PATTERN File: 7.485.80
VSAPI PATTERN Date: 23 Sep 2010
VSAPI PATTERN Date: 9/23/2010 12:00:00 AM

Step 1

Remove malware files dropped/downloaded by JS_JSREDIR.CH

Step 2

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 3

Scan your computer with your Trend Micro product to delete files detected as JS_JSREDIR.CH. 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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