Analysis by: Christopher Daniel So
ALIASES:

JV/Exploit-Blacole.q (McAfee), Exploit.Java.CVE-2012-1723.dj (Kaspersky)

 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 downloads a file and executes it on the affected system. As a result, routines of the downloaded file are exhibited on the affected computer.

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

  TECHNICAL DETAILS

File Size: Varies
File Type: Java Class
Initial Samples Received Date: 28 Aug 2012

Arrival Details

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

Download Routine

This Trojan takes advantage of the following software vulnerabilities to download possibly malicious files:

NOTES:

This Trojan downloads the file specified in the parameter uid and saves the downloaded file as %User Temp%\{random file name}. It then executes the downloaded file.

  SOLUTION

Minimum Scan Engine: 9.200
FIRST VSAPI PATTERN FILE: 9.354.01
FIRST VSAPI PATTERN DATE: 28 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.ERZ. 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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