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JAVA_EXPLOYT.XC

October 09, 2012
 Analysis by: Christopher Daniel So
 ALIASES:

Exploit.Java.CVE-2012-0507.br (Kaspersky)

 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

This Trojan executes when a user accesses certain websites where it is hosted.

  TECHNICAL DETAILS

File Size:

Varies

File Type:

JAR, Java Class

Initial Samples Received Date:

17 Apr 2012

Arrival Details

This Trojan executes when a user accesses certain websites where it is hosted.

NOTES:
It downloads the file specified in its parameter uhjgsd and saves the downloaded file as %User Temp%\ms0cfg32.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.. %Temp% is the Windows Temporary folder, which is usually C:\Windows\Temp or C:\WINNT\Temp.)

It then executes the downloaded file.

  SOLUTION

Minimum Scan Engine:

9.200

FIRST VSAPI PATTERN FILE:

8.918.01

FIRST VSAPI PATTERN DATE:

17 Apr 2012

VSAPI OPR PATTERN File:

8.919.00

VSAPI OPR PATTERN Date:

18 Apr 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

Close all opened browser windows

Step 3

Search and delete this file

[ 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%\ms0cfg32.exe

Step 4

Scan your computer with your Trend Micro product to delete files detected as JAVA_EXPLOYT.XC. 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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