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JS_VMLFILL.A

October 08, 2012
 Analysis by: Christopher Daniel So
 ALIASES:

VirTool:JS/Obfuscator.H (Microsoft), JS/Downloader-AUD (McAfee), Mal/ObfJS-A (Sophos), Trojan.JS.Obfuscator.h (Sunbelt), JS/WebAttacker!exploit (Fortinet), JS/Dccrypt.A.gen (FProt)

 PLATFORM:

Windows 2000, XP, Server 2003

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW


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

It inserts an IFRAME tag that redirects users to certain URLs.

  TECHNICAL DETAILS

File Size:

Varies

File Type:

HTML, HTM

Memory Resident:

No

Initial Samples Received Date:

11 May 2007

Payload:

Connects to URLs/Ips

Arrival Details

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

Other Details

This Trojan inserts an IFRAME tag that redirects users to the following URLs:

  • http://{BLOCKED}r.com/css/start.php?id=vlnd

NOTES:
However, as of this writing, the said site is inaccessible.

  SOLUTION

Minimum Scan Engine:

8.900

NOTES:

Trend customers:

    Keep your pattern and scan engine files updated. Trend Micro antivirus software can clean or remove most types of computer threats. Malware, though, such as Trojans, scripts, overwriting viruses and joke programs which are identified as uncleanable, should simply be deleted.

All Internet users:

  • Use HouseCall - the Trend Micro online threat scanner to check for malware that may already be on your PC.
  • Catch malware/grayware before they affect your PC or network. Secure your Web world with Trend Micro products that offer the best anti-threat and content security solutions for home users, corporate users, and ISPs. Go here for more information on Trend Micro products that fit your needs.


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