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TROJ_SHIXPLOIT.B

October 09, 2012
 Analysis by: kathleenno
 ALIASES:

Trojan.Shixploit (Symantec); Exploit:HTML/CVE-2011-1255 (Microsoft); Exploit.HTML.CVE-2011-1255.a (Kaspersky)

 PLATFORM:

Windows 2000, Windows XP, Windows 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 hosted on a website and run when a user accesses the said website.

  TECHNICAL DETAILS

File Size:

7,227 bytes

File Type:

HTML, HTM

Memory Resident:

No

Initial Samples Received Date:

28 Jun 2011

Arrival Details

This Trojan may be hosted on a website and run when a user accesses the said website.

Download Routine

This Trojan takes advantage of the following software vulnerabilities to download possibly malicious files:

  • CVE-2011-1255

After successfully exploiting the said vulnerability, this malware connects to the following URLs to possibly download other malicious files:

  • http://{BLOCKED}sbistro.com/PopCalendar2005/CSS/Classic_Images/x.exe

It saves the files it downloads using the following names:

  • %User Temp%\svchost.exe

(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.)

Other Details

For more information on the aforementioned vulnerabilities, please see the following pages:

  SOLUTION

Minimum Scan Engine:

8.900

Step 1

Close all opened browser windows

Step 2

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 3

Scan your computer with your Trend Micro product to delete files detected as TROJ_SHIXPLOIT.B. 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.microsoft.com/technet/security/Bulletin/MS11-050.mspx


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