Analysis by: Cris Nowell Pantanilla
ALIASES:

Exploit]Java/Blacole.DQ (Microsoft); Trojan.Maljava (Norton); Exploit.Java.CVE-2011-3544.fb (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

Infection Channel: Downloaded from the Internet

This is the Trend Micro detection for malicious Java Class that attempts to exploit an unknown vulnerability in the Java Runtime Environment component in Oracle Java SE JDK and JRE 7 and 6 Update 27 and earlier which may allow to execute malicious codes on the affected system.

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

It does not have any propagation routine.

It does not have any backdoor routine.

It does not drop any other file.

It does not have any downloading capability.

It does not have any information-stealing capability.

  TECHNICAL DETAILS

File Size: 8,949 bytes
File Type: Java Class
Initial Samples Received Date: 11 Feb 2012

Arrival Details

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

Propagation

This Trojan does not have any propagation routine.

Backdoor Routine

This Trojan does not have any backdoor routine.

Dropping Routine

This Trojan does not drop any other file.

Download Routine

This Trojan does not have any downloading capability.

Information Theft

This Trojan does not have any information-stealing capability.

NOTES:

This is the Trend Micro detection for malicious Java Class that attempts to exploit an unknown vulnerability in the Java Runtime Environment component in Oracle Java SE JDK and JRE 7 and 6 Update 27 and earlier which may allow to execute malicious codes on the affected system. More information about this vulnerability can be viewed using the following link:

This may be used as a component of other malware.

It does not have rootkit capabilities.

  SOLUTION

Minimum Scan Engine: 9.200
FIRST VSAPI PATTERN FILE: 8.770.01
FIRST VSAPI PATTERN DATE: 11 Feb 2012
VSAPI OPR PATTERN File: 8.771.00
VSAPI OPR PATTERN Date: 12 Feb 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

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


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