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JAVA_DLOADER.NTW
Aliases: TrojanDownloader:Java/OpenConnection.IQ (Microsoft)
Malware type: Trojan
Destructive: No
Platform: Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)
Encrypted: No
In the wild: Yes

Overview


Infection Channel: Downloaded from the Internet

This malware claims to be an update installer for Java. Once installed, it downloads malicious files onto the affected system and executes them, causing routines to be exhibited. This may result in the compromise of the system's security.

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

For the related story, you may read the blog post Malware Poses as an Update for Java 0-Day Fix

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

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

Technical Details


File size: 5,229 bytes
File type: Java Class
Initial samples received date: 17 Jan 2013
Payload: Downloads files

Arrival Details

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

Download Routine

This Trojan accesses the following websites to download files:

  • http://{BLOCKED}rencyreport.com/cybercrime-suspect-arrested/up1.exe - detected as BKDR_ANDROM.NTW
  • http://{BLOCKED}rencyreport.com/cybercrime-suspect-arrested/up2.exe - detected as TSPY_KEYLOG.NTW

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

NOTES:

This malware is hosted on the URL http://{BLOCKED}rencyreport.com/cybercrime-suspect-arrested.

Upon loading the said site, this malware is executed:

It accesses the following URLs for the following purposes:

  • http://{BLOCKED}rencyreport.com/cybercrime-suspect-arrested/lss.ini - configuration file which contains the URL of the files to be downloaded
  • http://{BLOCKED}rencyreport.com/cybercrime-suspect-arrested/ess.ini - configuration file which contains the file name of files to be executed
  • http://{BLOCKED}rencyreport.com/cybercrime-suspect-arrested/igs.ini - configuration file which contains the number of files to be downloaded

Solution


Minimum scan engine: 9.300
First VSAPI Pattern File: 9.662.02
First VSAPI Pattern Release Date: 17 Jan 2013
VSAPI OPR Pattern Version: 9.663.00
VSAPI OPR Pattern Release Date: 18 Jan 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

Remove malware/grayware files dropped/downloaded by JAVA_DLOADER.NTW

Step 4

Scan your computer with your Trend Micro product to delete files detected as JAVA_DLOADER.NTW. 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.


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Analysis By: Rhena Inocencio

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