Analysis by: Karl Dominguez
 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

This Trojan connects to a certain URL using the Internet browser to display an animation. It does this to hide its malicious routine.

It sets a URL as the automatic configuration script address of the affected system. The URL hosts a malicious configuration script that monitors the affected system Internet activity. Trend Micro detects this as JS_BANKER.SMEV.

This Trojan may be downloaded by other malware/grayware/spyware from remote sites. It may be unknowingly downloaded by a user while visiting malicious websites.

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.

  TECHNICAL DETAILS

File Size: 337,408 bytes
File Type: EXE
File Compression: Telock
Memory Resident: No
Initial Samples Received Date: 20 Sep 2011
Payload: Connects to URLs/IPs, Displays an animation

Arrival Details

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

It may be unknowingly downloaded by a user while visiting malicious websites.

Other System Modifications

This Trojan adds the following registry entries:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings
AutoConfigURL = http://{BLOCKED}-cache.com/ie

Download Routine

This Trojan connects to the following malicious URLs:

  • http://www.{BLOCKED}nvirtual.com/index.php

NOTES:

It connects to the following URL using the Internet browser to display an animation. It does this to hide its malicious routine:

  • http://img1.{BLOCKED}sfun.com/BrFlash/TeAdoro/156.swf

It sets the following URL as the automatic configuration script address of the affected system:

  • http://{BLOCKED}-cache.com/ie

The URL hosts a malicious configuration script that monitors the affected system Internet activity. Trend Micro detects this as JS_BANKER.SMEV.

  SOLUTION

Minimum Scan Engine: 9.200
FIRST VSAPI PATTERN FILE: 8.440.04
FIRST VSAPI PATTERN DATE: 20 Sep 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

Remove malware files dropped/downloaded by TROJ_BANLOAD.AXM

     
    • JS_BANKER.SMEV

Step 3

Delete this registry value

[ Learn More ]

Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.

  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings
    • AutoConfigURL = http://{BLOCKED}-cache.com/ie

Step 4

Scan your computer with your Trend Micro product to delete files detected as TROJ_BANLOAD.AXM. 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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