Threat Description



Category: Malware
Type: Trojan-Spy
Platform: W32
Date Discovered: January 27, 2004
Aliases: Banker.ARK, TSPY_BANKER.BVE, TR/Spy.Banker.abn.2, TrojanSpy:Win32/Banker!06E9


Banker is a family of spying trojans that attempt to steal information that is required to access the websites of certain online banks and online payment systems. Banker trojans usually steal logins, passwords, PINs, check words, and other info related to logging onto financial websites. This variant of Banker attempts to attack some Online Brazilian Bank Account Holders.


Automatic action

Once detected, the F-Secure security product will automatically disinfect the suspect file by either deleting it or renaming it.

More scanning & removal options

More information on scanning or removal options is available in the documentation for your F-Secure security product on the Downloads section of our Home - Global site.

You may also refer to the Knowledge Base on the F-Secure Community site for more information.

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Technical Details

This memory resident Trojan-Spy Malware drops a copy of itself in the Windows System folder with filename SYSTEM32.EXE. Moreover, it drops several copies of itself in the following fixed locations and filename depending the operating system:

For Windows 2000 and XP:
  • C:\Documents and Settings\All Users\Menu Iniciar\Programas\Inicializar\system32.exe
  • C:\Documents and Settings\All Users\start menu\programs\startup\system32.exe
For Windows 98:
  • C:\Windows\Menu Iniciar\Iniciar\system32.exe

It then adds the following registry entry as its auto start technique:

  • [HKEY_LOCAL_MACHINE\SOFTWARE\ Microsoft\Windows\CurrentVersion\Run]"system32" = "%sysdir%\system32.exe"

*NOTE %SysDir% is Windows System folder.

Banker steals logon credentials, that are related to some Brazilian Banks, by logging keystrokes when the Internet Browser title bar contains any of the following strings:

  • caixa
  • check
  • PayPal - Welcome
  • sant
  • spc.Internet Banking
  • unib

Banker uses the following account details to send the stolen information to

  • Smtp server : smtp.sao.[REMOVED][removed]
  • E-mail acccount : bandidodimas@[REMOVED]
  • Password : f1l1pp3

Information stolen includes the following details:

  • Bank Name
  • Computer Name
  • IE-Version
  • IP Address
  • MAC Address
  • Password
  • System Date
  • System Time
  • Username


F-Secure Anti-Virus detects this malware with the following updates:

Detection Type: PC
Database: 2006-07-26_01


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