Analysis by: Kathleen Notario
 Modified by: Christopher Daniel So
ALIASES:

Exploit:Java/Blacole.ET (Microsoft); JV/Exploit-Blacole.a (McAfee); Exploit.Java.CVE-2012-0507.ac (Kaspersky); Exp/20120507-A (Sophos)

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003, Mac OS

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

It takes advantage of certain vulnerabilities.

  TECHNICAL DETAILS

File Size: 3,800 bytes
File Type: Java Class
Memory Resident: No
Initial Samples Received Date: 02 Apr 2012

Arrival Details

This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

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 may download the file specified in the parameter gsd8zgx9chp. It needs other components to function properly.

  SOLUTION

Minimum Scan Engine: 9.200
FIRST VSAPI PATTERN FILE: 8.882.12
FIRST VSAPI PATTERN DATE: 02 Apr 2012
VSAPI OPR PATTERN File: 8.883.00
VSAPI OPR PATTERN Date: 03 Apr 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_EXPLCVE.RT. 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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