Analysis by: Sabrina Lei Sioting
 Modified by: Christopher Daniel So
ALIASES:

Exploit:Java/CVE-2010-0094.BK (Microsoft); Trojan.Maljava (Symantec); Exploit-CVE2010-0094 (McAfee); Trojan-Downloader.Java.OpenConnection.cx (Kaspersky); Java/CVE20100094.C!exploit (Fortinet)

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

It takes advantage of an unknown vulnerability in a certain software to allow a remote malicious user or malware to download files on the affected machine.

  TECHNICAL DETAILS

File Size: 7,594 bytes
File Type: Java Class
Memory Resident: No
Initial Samples Received Date: 27 Jan 2011
Payload: Downloads and executes other malicious files

Arrival Details

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

Other Details

This Trojan takes advantage of an unknown vulnerability in a certain software to allow a remote malicious user or malware to download files on the affected machine.

More information on this vulnerability can be found below:

It does the following:

  • Decrypts its parameter named a to be used by TROJ_JAVA.DD.
  • Loads and executes the following files:
    • af439f03798.class - detected as TROJ_JAVA.DE
    • aa79d1019d8.class - detected as TROJ_JAVA.DD

  SOLUTION

Minimum Scan Engine: 8.900
FIRST VSAPI PATTERN FILE: 7.794.18
FIRST VSAPI PATTERN DATE: 27 Jan 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

Remove malware files dropped/downloaded by TROJ_JAVA.CQ

Step 3

Close all opened browser windows

Step 4

Scan your computer with your Trend Micro product to delete files detected as TROJ_JAVA.CQ. 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 5

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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