Analysis by: Michael Cabel
 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 checks if the operating system used on the affected system is Windows. If so, it downloads a possibly malicious file from where it is hosted and saves the said file as %User Temp%\{random file rame}.exe. It then executes the downloaded file. As a result, routines of the downloaded file are then exhibited on the affected system.

This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites. It may be hosted on a website and run when a user accesses the said website.

  TECHNICAL DETAILS

Tipo de compactação: 16,405 bytes
Tipo de arquivo: Java Class
Data de recebimento das amostras iniciais: 19 Jul 2011

Arrival Details

This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

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

NOTES:
It checks if the operating system used on the affected system is Windows. If so, it downloads a possibly malicious file from where it is hosted and saves the said file as %User Temp%\{random file rame}.exe. It then executes the downloaded file. As a result, routines of the downloaded file are then exhibited on the affected system.

  SOLUTION

Mecanismo de varredura mínima: 8.900
Primeiro arquivo padrão VSAPI: 8.296.14
Data do lançamento do primeiro padrão VSAPI: 19 Jul 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

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