Analysis by: Michael Cabel
 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

Trend Micro has flagged this Trojan as noteworthy due to the increased potential for damage, propagation, or both, that it possesses. Specifically, it exploits a 0-day vulnerability in Adobe Flash Player and Acrobat.

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

Once a malware successfully exploits the said vulnerability, it causes certain actions to be done on the system.

It executes the dropped file(s). As a result, malicious routines of the dropped files are exhibited on the affected system.

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

  TECHNICAL DETAILS

File Size: 241,679 bytes
File Type: PDF
Memory Resident: No
Initial Samples Received Date: 29 Oct 2010
Payload: Drops files

Arrival Details

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

Note :

Other Details

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

  • Takes advantage of a 0-day vulnerability in Adobe Flash Player and Adobe Acrobat.

Once a malware successfully exploits the said vulnerability, it causes the following actions to be done on the system:

  • Drops the following files on the affected system:
    • %User Temp%\~.exe - detected as TROJ_WISP.SMA
    • %User Temp%\~temp.bat - non-malicious file

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003.)

This Trojan executes the dropped file(s). As a result, malicious routines of the dropped files are exhibited on the affected system.

More information on this vulnerability can be found below:

  • http://www.adobe.com/support/security/advisories/apsa10-05.html

  SOLUTION

Minimum Scan Engine: 8.900
VSAPI OPR PATTERN File: 7.579.00
VSAPI OPR PATTERN Date: 29 Oct 2010

Step 1

For Windows ME and XP 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_PIDIEF.SMQA

Step 3

Scan your computer with your Trend Micro product to delete files detected as TROJ_PIDIEF.SMQA 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.

Step 4

Download and apply this security patch Refrain from using these products until the appropriate patches have been installed. Trend Micro advises users to download critical patches upon release by vendors.


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