Analysis by: Cris Nowell Pantanilla
 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

Infection Channel: Spammed via email

When executed, this malware connects to a website to access a .SWF file that exploits CVE-2012-0779 found in certain versions of Adobe Flash Player.

To get a one-glance comprehensive view of the behavior of this Trojan, refer to the Threat Diagram shown below.

This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users.

  TECHNICAL DETAILS

File Size: 114,192 bytes
File Type: DOC
Initial Samples Received Date: 07 May 2012
Payload: Executes files

Arrival Details

This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users.

NOTES:
Once this malicious Word document is opened, it connects to the following website to execute a malicious SWF file:

  • http://www.{BLOCKED}ups.com/update/top.swf?info=789c2b2f2fd74b4ec94c2fca2f2d28d64bcecfb53204020062fe07cf&infosize=00260100

The malicious .SWF file is detected by Trend Micro as SWF_LOADER.EHL. This .SWF file extracts and executes an embedded .EXE in this Word document. As a result, malicious routines of the executed file is exhibited on the affected system.

  SOLUTION

Minimum Scan Engine: 9.200
FIRST VSAPI PATTERN FILE: 8.978.07
FIRST VSAPI PATTERN DATE: 08 May 2012
VSAPI OPR PATTERN File: 8.979.00
VSAPI OPR PATTERN Date: 08 May 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

Remove malware files dropped/downloaded by TROJ_SCRIPBRID.A

Step 3

Scan your computer with your Trend Micro product to delete files detected as TROJ_SCRIPBRID.A. 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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