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JS_OBFUSCA.SMA

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

Windows 2000, XP, 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 unknowingly downloaded by a user while visiting malicious websites.

It requires its main component to successfully perform its intended routine.

  TECHNICAL DETAILS

File Size:

Varies

File Type:

Script

Memory Resident:

No

Initial Samples Received Date:

18 Oct 2010

Arrival Details

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

Other Details

Based on analysis of the codes, it has the following capabilities:

  • Disable text selection in browsers.
  • Able to decode Base64 encoded text.

It requires its main component to successfully perform its intended routine.

  SOLUTION

Minimum Scan Engine:

8.900

VSAPI PATTERN File:

7.551.00

VSAPI PATTERN Date:

19 Oct 2010

VSAPI PATTERN Date:

10/19/2010 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

Close all opened browser windows

Step 3

Scan your computer with your Trend Micro product to delete files detected as JS_OBFUSCA.SMA. 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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