Analysis by: Marfel Tiamzon
 Modified 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

This Trojan executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system. As of this writing, the said sites are inaccessible.

  TECHNICAL DETAILS

File Size: 1,826 bytes
File Type: Java Class
Memory Resident: No
Initial Samples Received Date: 19 Oct 2010

Download Routine

This Trojan accesses the following websites to download files:

  • http://{BLOCKED}.{BLOCKED}.25.223/1/404.htm
  • http://{BLOCKED}.{BLOCKED}.25.224/2/404.htm

It saves the files it downloads using the following names:

  • %User Temp%\{Random}.swf

(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.)

It then executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.

As of this writing, the said sites are inaccessible.

Other Details

This Trojan does the following:

  • It deletes the downloaded file after execution.

  SOLUTION

Minimum Scan Engine: 8.900
VSAPI PATTERN File: 7.553.80
VSAPI PATTERN Date: 19 Oct 2010
VSAPI PATTERN Date: 10/19/2010 12:00:00 AM

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

Scan your computer with your Trend Micro product to delete files detected as JAVA_AGENT.P 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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