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JAVA_AGENT.REF

October 09, 2012
 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

Infection Channel:

Downloaded from the Internet

This malware is a component of a black hole exploit kit that may be used to drop or download files.

It needs other components to function properly.

After successfully exploiting the said vulnerability, this malware connects to a certain URL to possibly download other malicious files.

This Trojan takes advantage of certain vulnerabilities.

  TECHNICAL DETAILS

File Size:

20,253 bytes

File Type:

JAR

Memory Resident:

No

Initial Samples Received Date:

12 May 2012

Payload:

Downloads files

Arrival Details

This Trojan may be downloaded from the following remote sites:

  • http://{BLOCKED}b.net/Edu.jar

Download Routine

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

  • http://{BLOCKED}b.net/data/ap2.php - detected as TROJ_PIDIEF.SLS
  • http://{BLOCKED}b.net/data/ap1.php?f=6dfda - detected as TROJ_PIDIEF.SMB1

Other Details

This Trojan takes advantage of the following vulnerabilities:

NOTES:

It is a component of a black hole exploit kit that may be used to drop or download files.

It needs other components to function properly.

  SOLUTION

Minimum Scan Engine:

9.200

FIRST VSAPI PATTERN FILE:

8.990.04

FIRST VSAPI PATTERN DATE:

12 May 2012

VSAPI OPR PATTERN File:

8.991.00

VSAPI OPR PATTERN Date:

12 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_AGENT.REF

Step 3

Close all opened browser windows

Step 4

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