Threat Detail

  • Malware Type: Trojan
  • Malware Sub-type: Password Stealer
  • Protection Added: 2005-03-25

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.

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PWS-Banker.gen.i is a password stealing trojan that captures bank account information (username/password) and sends this information to the author via different methods. These methods include (this is not an exclusive list)

  • FTP
  • SMTP
  • HTTP (embedded through URLs or through FORMs)
  • Fake HTTP pages
  • Keyloggers
  • Custom backdoors
  • Injecting DLLs into memory

There are several variants of the trojan. The description is a general guide.  Newer variants require the latest DAT files for detection and cleaning.

In addition, Password Stealers may steal data from the hard drive.

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.

N/A. Password Stealers are not viruses, and as such do not themselves contain any method to replicate. However they may themselves be downloaded by other viruses and/or Trojans to be installed on the user's system.

Many of these additionally are mass spammed by the author to entice people into double-clicking on them.

Alternatively they may be installed by visiting a malicious web page (either by clicking on a link, or by the website hosting a scripted exploit which installs the Password Stealer onto the user's system with no user interaction.

The Trojan is running in the process list.

Mails may be sent using Outlook in some instances, or network traffic on port 25, connecting to a remote SMTP (mail) server to send email data to the malware author.

Infected user might be prompted to enter their online banking credentials after running the malware.