JS_WOBFUS.NT

October 09, 2012

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 Analysis by: Abraham Latimer Camba

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 PLATFORM:

Windows 2000, Windows XP, Windows 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 may arrive bundled with malware packages as a malware component.

  TECHNICAL DETAILS

File Size:

82,049 bytes

File Type:

Script

Initial Samples Received Date:

21 Mar 2012

Arrival Details

This Trojan may arrive bundled with malware packages as a malware component.

NOTES:
This Trojan is an obfuscated JavaScript that requires its component file to deobfucate itself to successfully perform its malicious routine.

  SOLUTION

Minimum Scan Engine:

9.200

FIRST VSAPI PATTERN FILE:

8.856.02

FIRST VSAPI PATTERN DATE:

22 Mar 2012

VSAPI OPR PATTERN File:

8.857.00

VSAPI OPR PATTERN Date:

23 Mar 2012

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

Scan your computer with your Trend Micro product to delete files detected as JS_WOBFUS.NT. 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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