Analysis by: Sabrina Lei Sioting
 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 Trojan may be downloaded by other malware/grayware from remote sites.

It takes advantage of certain vulnerabilities.

  TECHNICAL DETAILS

File Size: 18,670 bytes
File Type: JAR
Initial Samples Received Date: 02 May 2012
Payload: Connects to URLs/IPs, Downloads files

Arrival Details

This Trojan may be downloaded by the following malware/grayware from remote sites:

  • http:// {BLOCKED}.76.246/Edu.jar
  • http://{BLOCKED}0.168/Edu.jar

Download Routine

This Trojan connects to the following website(s) to download and execute a malicious file:

  • http://{BLOCKED}0.168/q.php?f=f821b&e=0

It saves the files it downloads using the following names:

  • %User Temp%\hnszs0.exe - detected as TROJ_INJECTO.VE

(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

This Trojan takes advantage of the following vulnerabilities:

NOTES:

It is a component of a Blackhole Exploit Kit that may be used to drop or download files.

It needs other components to function properly.

  SOLUTION

Minimum Scan Engine: 9.200
VSAPI OPR PATTERN File: 8.967.00
VSAPI OPR PATTERN Date: 03 May 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

Remove malware files dropped/downloaded by JAVA_BLACOLE.RCC

Step 3

Close all opened browser windows

Step 4

Scan your computer with your Trend Micro product to delete files detected as JAVA_BLACOLE.RCC. 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 5

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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