JS_DLOADER.SMD

October 08, 2012
 Analysis by: Roland Marco Dela Paz
 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 is the Trend Micro detection for certain malicious JavaScript (JS) files embedded on HTML Web pages.

When run, it connects to Twitter sites. These sites are used by the malicious script to generate domains by utilizing Twitter API. The generated domains will then be used later on by cybercriminals for their malicious purposes.

  TECHNICAL DETAILS

File Size:

Varies

File Type:

Script

Initial Samples Received Date:

15 Sep 2010

Other Details

This Trojan connects to the following possibly malicious URL:

  • http://{BLOCKED}h.twitter.com/trends/daily.{BLOCKED}llback=callback
  • http://{BLOCKED}h.twitter.com/trends/daily.{BLOCKED}ate=2010-09-24&callback=callback2

NOTES:
This script connects to Twitter sites. These sites are used by the malicious script to generate domains by utilizing Twitter API. The generated domains will then be used later on by cybercriminals for their malicious purposes.

  SOLUTION

Minimum Scan Engine:

8.900

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_DLOADER.SMD. 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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