Analysis by: kathleenno
 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 malicious .DOC file has two embedded .SWF files that it loads to exploit CVE-2011-0611.

Once successfully exploited, this malware connects to a specific URL to download another possibly malicious file. As a result, routines of the downloaded file are exhibited in the system.

This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users. It may be unknowingly downloaded by a user while visiting malicious websites.

However, as of this writing, the said sites are inaccessible.

  TECHNICAL DETAILS

File Size: 26,592 bytes
File Type: DOC
Memory Resident: Yes
Initial Samples Received Date: 07 Jul 2011

Arrival Details

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

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

Other Details

More information on this vulnerability can be found below:

However, as of this writing, the said sites are inaccessible.

NOTES:
This malicious .DOC file has two embedded .SWF files that it loads to exploit CVE-2011-0611.

Once successfully exploited, this malware will connect to the following URL to download another possibly malicious file:

  • http://{BLOCKED}kofamerica.org/g.exe

The downloaded file is then saved as %User Temp%\g.exe.

  SOLUTION

Minimum Scan Engine: 8.900
FIRST VSAPI PATTERN FILE: 8.272.15
FIRST VSAPI PATTERN DATE: 08 Jul 2011

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

Search and delete these files

[ Learn More ]
There may be some component files that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the "More advanced options" option to include all hidden files and folders in the search result. %User Temp%\g.exe

Step 3

Scan your computer with your Trend Micro product to delete files detected as TROJ_MALDOC.SW. 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.  http://www.adobe.com/support/security/bulletins/apsb11-08.html


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