JAVA_DLOADR.BA

October 09, 2012

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 Analysis by: Erika Bianca Mendoza

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 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 arrives as a component bundled with malware/grayware packages. It executes when a user accesses certain websites where it is hosted.

  TECHNICAL DETAILS

File Size:

8,192 bytes

File Type:

Java Class

Initial Samples Received Date:

22 Nov 2011

Arrival Details

This Trojan arrives as a component bundled with malware/grayware packages.

It executes when a user accesses certain websites where it is hosted.

NOTES:

This malware downloads from a URL specified in the parameter aaa. It then saves the downloaded file as %User Temp%\{random}.exe.

It executes the file by running the following command-line:

• regsvr32 -s {random number}.exe

  SOLUTION

Minimum Scan Engine:

9.200

FIRST VSAPI PATTERN FILE:

8.592.02

FIRST VSAPI PATTERN DATE:

22 Nov 2011

VSAPI OPR PATTERN File:

8.593.00

VSAPI OPR PATTERN Date:

22 Nov 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

Close all opened browser windows

Step 3

Search and delete this file

[ Learn More ]

[ back ]

There may be some component files that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden files and folders in the search result.

• %User Temp%\{random number}.exe

To delete the malware/grayware/spyware file:

1. Right-click Start then click Search... or Find..., depending on the version of Windows you are running.
2. In the Named input box, type:
   
   • %User Temp%\{random number}.exe
3. In the Look In drop-down list, select My Computer, then press Enter.
4. Once located, select the file then press SHIFT+DELETE to permanently delete the file.

Step 4

Scan your computer with your Trend Micro product to delete files detected as JAVA_DLOADR.BA. 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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