Analysis by: adel
 PLATFORM:

Windows 98, ME, NT, 2000, XP, Server 2003

 OVERALL RISK RATING:
 REPORTED INFECTION:
 SYSTEM IMPACT RATING:
 INFORMATION EXPOSURE:

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This {malware/spyware type} has received attention from independent media sources and/or other security firms.

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

This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users.

It is injected into all running processes to remain memory resident.

It connects to certain URLs. It may do this to remotely inform a malicious user of its installation. It may also do this to download possibly malicious files onto the computer, which puts the computer at a greater risk of infection by other threats.

It connects to certain websites to send and receive information.

  TECHNICAL DETAILS

Arrival Details

This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users.

Installation

This Trojan injects itself into the following processes running in the affected system's memory:

  • CSRSS.EXE
  • LSASS.EXE

It is injected into all running processes to remain memory resident.

Download Routine

This Trojan connects to the following malicious URLs:

  • http://{BLOCKED}.{BLOCKED}.149.132/fwq/indux.php?U={value}
  • http://{BLOCKED}lomodulo.hpg.com.br/hostplug.jpg
  • http://{BLOCKED}lomodulo.hpg.com.br/winhelpens.jpg
  • http://{BLOCKED}lomodulo.hpg.com.br/hostne.jpg

Other Details

This Trojan connects to the following website to send and receive information:

  • http://{BLOCKED}.{BLOCKED}.149.132/fwq/indux.php?U={value}

  SOLUTION

Minimum Scan Engine: 8.900
FIRST VSAPI PATTERN FILE: 6.950.12
FIRST VSAPI PATTERN DATE: 25 Mar 2010
VSAPI OPR PATTERN File: 6.955.00
VSAPI OPR PATTERN Date: 27 Mar 2010

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 and note files detected as TROJ_DLOADR.AUI

Step 3

Scan your computer with your Trend Micro product to delete files detected as TROJ_DLOADR.AUI. 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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