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JAVA_LAMAR.E

August 27, 2013
 Analysis by: Jennifer Gumban
 Modified by: Jaime Benigno Reyes
 ALIASES:

Trojan.Maljava (Sophos), HEUR:Exploit.Java.CVE-2012-1723.gen (Kaspersky)

 PLATFORM:

Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Downloaded from the Internet

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

  TECHNICAL DETAILS

File Size:

20,102 bytes

File Type:

Java

Memory Resident:

No

Initial Samples Received Date:

23 Aug 2013

Payload:

Downloads files

Arrival Details

This Trojan may arrive bundled with malware packages as a malware component.

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

Download Routine

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

It downloads a possibly malicious file from a certain URL. The URL where this malware downloads the said file depends on the following parameter(s) passed on to it by its components:

  • duFJfXw

NOTES:

This is the Trend Micro detection for malicious Java Class that attempts to exploit a vulnerability in the Java Runtime Environment component of the following:

  • JDK and JRE 7 Update 4 and earlier Java SE
  • JDK and JRE 6 Update 32 and earlier Java SE
  • JDK and JRE 5.0 Update 35 and earlier Java SE
  • SDK and JRE 1.4.2_37 and earlier Java SE

  SOLUTION

Minimum Scan Engine:

9.300

FIRST VSAPI PATTERN FILE:

10.234.03

FIRST VSAPI PATTERN DATE:

23 Aug 2013

VSAPI OPR PATTERN File:

10.235.00

VSAPI OPR PATTERN Date:

24 Aug 2013

Step 1

Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.

Step 2

Close all opened browser windows

Step 3

Scan your computer with your Trend Micro product to delete files detected as JAVA_LAMAR.E. 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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