JAVA_LOADER.HLK

October 08, 2012
 Analysis by: Michael Cabel
 ALIASES:

Microsoft: Exploit:Java/CVE-2010-0094.AY; Kaspersky: Exploit.Java.CVE-2010-0094.h

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

 OVERALL RISK RATING:
 REPORTED INFECTION:

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

This Trojan may be downloaded by other malware/grayware/spyware from remote sites. It may be unknowingly downloaded by a user while visiting malicious websites.

It takes advantage of software vulnerabilities to allow a remote user or malware/grayware to download files.

  TECHNICAL DETAILS

File Size:

Varies

File Type:

Java Class

Memory Resident:

No

Initial Samples Received Date:

03 Dec 2010

Arrival Details

This Trojan may be downloaded by other malware/grayware/spyware from remote sites.

It may be unknowingly downloaded by a user while visiting malicious websites.

Download Routine

This Trojan takes advantage of the following software vulnerabilities to allow a remote user or malware/grayware to download files:

  • Java Runtime Environment

Other Details

More information on this vulnerability can be found below:

It does the following:

  • Functions as a component of a malicious Java archive file (.JAR) that is hosted in a malicious website. The said .JAR file contains the following files, all of which are detected as JAVA_LOADER.HLK:
    • padle.class (1,878 bytes)
    • BlogRoner.class (7,605 bytes)
    • ClassPol.class (1,238 bytes)
    • Clrepor.class (745 bytes)
    • CusBen.class (6,429 bytes)
    • Glorussstmz.class (6,360 bytes)
    • hubert.class (3,209 bytes)
    • novell.class (712 bytes)

  SOLUTION

Minimum Scan Engine:

8.900

VSAPI PATTERN File:

7.674.01

VSAPI PATTERN Date:

03 Dec 2010

VSAPI PATTERN Date:

12/3/2010 12:00:00 AM

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 JAVA_LOADER.HLK. 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 these security patches Refrain from using these products until the appropriate patches have been installed. Trend Micro advises users to download critical patches upon release by vendors.  http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2010-0094


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