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JAVA_GONDY.A

August 27, 2012
 Analysis by: Jasen Sumalapao
 ALIASES:

Exploit:Java/CVE-2012-4681.O (Microsoft), Exploit.Java.CVE-2012-0507.pe (Kaspersky), Trojan.Maljava!gen24 (Symantec), Exploit.Java.CVE-2012-0507.AY (FSecure), EXP/2012-1723.ER.1 (Antivir), Java/Dong.A (Authentium), Exploit.Java.CVE-2012-0507.AY (Bitdefender), JAVA.Exploit.Agent-1 (Clamav), Java/Agent.NDE!exploit (Fortinet), Java/Dong.A (exact) (Fprot), Exploit.Java.CVE-2012 (Ikarus), a variant of Java/Exploit.CVE-2012-4681.A trojan (NOD32)

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Downloaded from the Internet


This Trojan is a part of a Java applet that exploits a Java Runtime Environment (JRE) vulnerability. It uses an HTML file to download and execute a backdoor.

To get a one-glance comprehensive view of the behavior of this Trojan, refer to the Threat Diagram shown below.

This Trojan is a part of a Java applet that exploits a Java Runtime Environment (JRE) vulnerability. It checks if the system is running on Windows OS and uses the component HTML file detected as JS_FIEROPS.A to download and execute a backdoor detected as BKDR_POISON.BLW. The malicious Java applet then deletes the binary once executed.

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

It executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.

It executes certain actions WITHIN the affected computer.

  TECHNICAL DETAILS

File Size:

3,946 bytes

File Type:

JAR, Java Class

Initial Samples Received Date:

27 Aug 2012

Payload:

Downloads files

Arrival Details

This Trojan may be downloaded by the following malware/grayware from remote sites:

  • JS_FIEROPS.A

It may be downloaded from the following remote sites:

  • http://ok.{BLOCKED}4.net/meeting/applet.jar
  • http://{BLOCKED}.{BLOCKED}.104.149/public/meeting/applet.jar

Download Routine

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

It then executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.

Other Details

This Trojan executes the following:

  • Disable security features
  • Download and execute binary components
  • Check the target's operating system

NOTES:

This Trojan is a part of a Java applet that exploits a Java Runtime Environment (JRE) vulnerability. It checks if the system is running on Windows OS and uses the component HTML file detected as JS_FIEROPS.A to download and execute a file saved as %User Temp%\update.exe. This file is detected as BKDR_POISON.BLW. The malicious Java applet then deletes the binary once executed.

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003.. %Temp% is the Windows Temporary folder, which is usually C:\Windows\Temp or C:\WINNT\Temp.)

  SOLUTION

Minimum Scan Engine:

9.200

FIRST VSAPI PATTERN FILE:

9.352.01

FIRST VSAPI PATTERN DATE:

27 Aug 2012

VSAPI OPR PATTERN File:

9.353.00

VSAPI OPR 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

Remove the malware/grayware file that dropped/downloaded JAVA_GONDY.A

Step 3

Scan your computer with your Trend Micro product to delete files detected as JAVA_GONDY.A. 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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