Analysis by: Mark Joseph Manahan
ALIASES:

Exploit:Java/Blacole.GD (Microsoft), Trojan.Maljava!gen23 (Symantec), Java/Exploit.CVE-2012-0507.DM trojan (Eset)

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

This is Trend Micro's detection for a Java class that exploits a certain vulnerability in Java Runtime Environment. This malware is part of the Blackhole exploit kit.

This Trojan arrives as a component bundled with malware/grayware packages. It may be hosted on a website and run when a user accesses the said website.

It requires its main component to successfully perform its intended routine.

  TECHNICAL DETAILS

File Size: Varies
File Type: Java Class
Initial Samples Received Date: 03 Aug 2012

Arrival Details

This Trojan arrives as a component bundled with malware/grayware packages.

It may be hosted on a website and run when a user accesses the said website.

Other Details

This Trojan requires its main component to successfully perform its intended routine.

NOTES:

This is Trend Micro's detection for a Java class that exploits a certain vulnerability in Java Runtime Environment. This malware is part of the Black Hole Exploit Kit.

This Trojan downloads and executes a possibly malicious file from a certain URL. The URL where this malware downloads the said file depends on the parameter passed on to it by its components.

  SOLUTION

Minimum Scan Engine: 9.200
FIRST VSAPI PATTERN FILE: 9.304.05
FIRST VSAPI PATTERN DATE: 04 Aug 2012
VSAPI OPR PATTERN File: 9.305.00
VSAPI OPR PATTERN Date: 05 Aug 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.AN. 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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