Swizzor

This page shows details and results of our analysis on the malware Swizzor

Overview

This is a trojan detection. Unlike viruses, trojans do not self-replicate. They are spread manually, often under the premise that they are beneficial or wanted. The most common installation methods involve system or security exploitation, and unsuspecting users manually executing unknown programs. Distribution channels include email, malicious or hacked web pages, Internet Relay Chat (IRC), peer-to-peer networks, etc.


Minimum Engine

5600.1067

File Length

Varies

Description Added

2005-10-12

Description Modified

2005-11-17

Malware Proliferation

Characteristics

This trojan was originally detected as Adware-Lop.  Due to stealthing and obfuscation mechanisms it uses and the very large number of new variants released in recent weeks, the classification has been changed. This application generates extra pop-up ads while using Internet Explorer.  Many versions of this application exist and this description may not cover all.

Installation

Upon execution a folder is created with random words for the name, such as the following:

  • C:\Documents and Settings\%User%\Application Data\Gram User That Play

In that folder, a file is also created with random words for the name, such as the following:

  • C:\Documents and Settings\%User%\Application Data\Gram User That Play\Peak Info Cool

This is a data file; it is not harmful by itself and neither the folder nor the file are visible through normal means.

A corresponding registry key may be created, using the same random words:

  • HKEY_CURRENT_USER\Software\%Random Words%

This application injects itself into Internet Explorer, and launches Internet Explorer in the background. It then connects to various URLs to retrieve information for display, such as the following:

  • ayb.lop.com
  • d4308.upd.lop.com
  • ayb.maximumexperience.com
  • ayb.trinityacquisitions.com
  • r25407.upd.lop.com
  • lop.com/search

Symptoms

Extra pop-up windows appear when using Internet Explorer.

Method of Infection

Trojans do not self-replicate. They are spread manually or by means of an exploit, such as through a malicious script in a web page.

Removal

All Users:
Use current engine and DAT files for detection and removal.

Modifications made to the system Registry and/or INI files for the purposes of hooking system startup, will be successfully removed if cleaning with the recommended engine and DAT combination (or higher).

But in some particular cases, the following steps need to be taken.

Please go to the Microsoft Recovery Console and restore a clean MBR.

On Windows XP:

  • Insert the Windows XP CD into the CD-ROM drive and restart the computer.
  • When the "Welcome to Setup" screen appears, press R to start the Recovery Console.
  • Select the Windows installation that is compromised and provide the administrator password.
  • Issue 'fixmbr' command to restore the Master Boot Record
  • Follow onscreen instructions.
  • Reset and remove the CD from CD-ROM drive.


On Windows Vista and 7:

  • Insert the Windows CD into the CD-ROM drive and restart the computer.
  • Click on "Repair Your Computer".
  • When the System Recovery Options dialog comes up, choose the Command Prompt.
  • Issue 'bootrec /fixmbr' command to restore the Master Boot Record.
  • Follow onscreen instructions.
  • Reset and remove the CD from CD-ROM drive.

Variants