Analysis by: Michael Cabel
 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

This Trojan may be hosted on a website and run when a user accesses the said website. It may be downloaded from remote sites by other malware.

  TECHNICAL DETAILS

File Size: 380 bytes
File Type: JS
Memory Resident: No
Initial Samples Received Date: 23 Dec 2010
Payload: Others

Arrival Details

This Trojan may be hosted on a website and run when a user accesses the said website.

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

  • HTML_SHELLCOD.SM

It may be downloaded from the following remote sites:

  • http://www.{BLOCKED}t.com/360safe.html

Other Details

This Trojan does the following:

  • Checks the User Agent of the affected system. If the user agent is msie 7, it loads the possibly malicious page 361.html (detected as HTML_SHELLCOD.SM) from where it is hosted. Otherwise, it loads the page 360.html which is detected as JS_EXPLOIT.SM1. As a result, routines of the said loaded pages are exhibited on the affected system.

  SOLUTION

Minimum Scan Engine: 8.900
VSAPI PATTERN File: 07.718.02
VSAPI PATTERN Date: 23 Dec 2010
VSAPI PATTERN Date: 12/23/2010 12:00:00 AM
VSAPI OPR PATTERN File: 7.719.00
VSAPI OPR PATTERN Date: 23 Nov 2010

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_EXPLOIT.ADA

Step 3

Scan your computer with your Trend Micro product to delete files detected as JS_EXPLOIT.ADA. 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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