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TROJ_JAVA.CG

October 08, 2012
 Analysis by: kathleenno
 ALIASES:

Trojan.Gen.2 (Symantec); Exploit:Java/CVE-2010-0840.AB (Microsoft); Trojan-Downloader.Java.OpenConnection.cc (Kaspersky); Mal/JavaHeL-G (Sophos)

 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 a component of a malicious Java archive file (.JAR).

When executed, it may connect to remote sites to download possibly malicious files. However, it requires other components in order to run properly.

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

  • Vulnerability in the Java Runtime Environment component in Oracle Java SE and Java for Business 6

  TECHNICAL DETAILS

File Size:

4,309 bytes

File Type:

Java Class

Initial Samples Received Date:

11 Feb 2011

Payload:

Downloads files

Download Routine

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

  • Vulnerability in the Java Runtime Environment component in Oracle Java SE and Java for Business 6

Other Details

More information on this vulnerability can be found below:

NOTES:

This is a component of a malicious Java archive file (.JAR).

When executed, it may connect to remote sites to download possibly malicious files. However, it requires other components in order to run properly.

  SOLUTION

Minimum Scan Engine:

8.900

FIRST VSAPI PATTERN FILE:

7.830.03

FIRST VSAPI PATTERN DATE:

11 Feb 2011

VSAPI OPR PATTERN File:

7.831.00

VSAPI OPR PATTERN Date:

11 Feb 2011

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

Scan your computer with your Trend Micro product to delete files detected as TROJ_JAVA.CG. 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 3

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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