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TSPY_ZBOT.BSN

October 08, 2012
 Analysis by: Kathleen Notario
 PLATFORM:

Windows 2000, XP, Server 2003

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

  • Threat Type: Spyware

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

This spyware attempts to steal sensitive online banking information, such as user names and passwords. This routine risks the exposure of the user's account information, which may then lead to the unauthorized use of the stolen data. It attempts to steal information, such as user names and passwords, used when logging into certain banking or finance-related websites.

It checks for the presence of the following processes which are related to Outpost Personal Firewall and ZoneLabs Firewall Client:

  • outpost.exe
  • zlclient.exe

It terminates if either of the said processes exist. This is to ensure that it runs uninterrupted. It also has rootkit capabilities, which enables it to hide its processes and files from the user.

  TECHNICAL DETAILS

File Size:

107,520 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

14 Aug 2010

Payload:

Steals information, Disables services

Arrival Details

This spyware may be downloaded from the following remote sites:

  • http://{BLOCKED}zbilnyak.cn/ittit/it.exe

Installation

This spyware adds the following folders:

  • %System%\lowsec

(Note: %System% is the Windows system folder, which is usually C:\Windows\System on Windows 98 and ME, C:\WINNT\System32 on Windows NT and 2000, or C:\Windows\System32 on Windows XP and Server 2003.)

It drops the following copies of itself into the affected system:

  • %System%\sdra64.exe

(Note: %System% is the Windows system folder, which is usually C:\Windows\System on Windows 98 and ME, C:\WINNT\System32 on Windows NT and 2000, or C:\Windows\System32 on Windows XP and Server 2003.)

It adds the following mutexes to ensure that only one of its copies runs at any one time:

  • __SYSTEM__64AD0625__

It injects itself into the following processes as part of its memory residency routine:

  • SVCHOST.EXE
  • WINLOGON.EXE

Autostart Technique

This spyware modifies the following registry entries to ensure it automatic execution at every system startup:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Winlogon
Userinit = %System%\userinit.exe, %System%\sdra64.exe,

(Note: The default value data of the said registry entry is %System%\userinit.exe, .)

Other System Modifications

This spyware adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Network
UID = {Computer name}_{Random numbers}

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile
EnableFirewall = 0

Dropping Routine

This spyware drops the following files:

  • %System%\lowsec\local.ds
  • %System%\lowsec\user.ds

(Note: %System% is the Windows system folder, which is usually C:\Windows\System on Windows 98 and ME, C:\WINNT\System32 on Windows NT and 2000, or C:\Windows\System32 on Windows XP and Server 2003.)

Download Routine

This spyware connects to the following URL(s) to download its configuration file:

  • http://{BLOCKED}zbilnyak.cn/ittit/doc.bin

Information Theft

This spyware attempts to steal sensitive online banking information, such as user names and passwords. This routine risks the exposure of the user's account information, which may then lead to the unauthorized use of the stolen data.

It accesses the following site to download its configuration file:

  • http://{BLOCKED}zbilnyak.cn/ittit/doc.bin

It attempts to access a website to download a file which contains information where the Trojan can download an updated copy of itself, and where to send its stolen data. This configuration file also contains the following list of targeted bank-related websites from which it steals information:

  • *.facebook.com/*
  • *.mcafee.com/*
  • *.microsoft.com/*
  • *allianzbank.it/s*
  • *click.alfabank.ru*
  • *csebanking.it*
  • *csebo.it*
  • *ib.cim-italia.it*
  • *ib.fineco.it/FinecoWeb/HomeBanking*
  • *servizi.cim-italia.it*
  • http*://*.cedacri.it*
  • http*://*allianzbank.it*
  • http*://*bancaeuro.it/OneToOne/ebank/functions/login/loginChecker.jsp*
  • http*://*bancaeuro.it/OneToOne/ebank/functions/n_be/accesso_be.jsp*
  • http*://*bancaeuro.it/OneToOne/ebank/functions/n_be/home_be.jsp*
  • http*://*bancagenerali.it*
  • http*://*bancaincasa.sba.bcc.it*footer_ita.html*
  • http*://*bancaincasa.sba.bcc.it*index_ita.html*
  • http*://*bancaincasa.sba.bcc.it/htdocs/homemain_ita.html*
  • http*://*bancamediolanum.it*
  • http*://*bancopostaimpresaonline.poste.it*
  • http*://*cariprato.it*
  • http*://*credem.it*
  • http*://*credem.it/OneToOne/ebank/functions*
  • http*://*creval.it*
  • http*://*csebanking.it/LogonEntry?abi=*
  • http*://*csebanking.it/ibportal/*
  • http*://*csebanking.it/ibportal/home-LOGIN_CLIENTE.do*
  • http*://*fideuramonline.it*
  • http*://*gbw*.it*
  • http*://*ibbweb.tecmarket.it*
  • http*://*in-biz.it*
  • http*://*internetbanking.friuladria.it/sm/login/FA/loginFA.jsp*
  • http*://*isideonline.it*
  • http*://*linksimprese.sanpaoloimi.com/pmiweb/LoginServlet*
  • http*://*privati.internetbanking.cariparma.it*
  • http*://*quiubibusiness.ssb.net*
  • http*://*rasbank.it*
  • http*://*sella.it*
  • http*://*sellasud-bag.it*
  • http*://*servizi.allianzbank.it*
  • http*://*unipolbanca.it/Frame/MenuPrivati.htm*
  • http*://*wbank.sibtonline.net*
  • http*://*wbank2.fmbcc.bcc.it*
  • http*://*web.secservizi.it/CommonApps/shared/bcp/privati/Identificazione.htm*
  • http*://*web.secservizi.it/jsp/secservizi.sec*
  • http*://*webanking.it*
  • http*://*webanking.it/htdocs/*_websitelogin_nocert.html*
  • http://alfabank.ru/retail/alfa_cheque/
  • http://allianzbank.it/rasbankit/js/login.js
  • http://virtuozbilnyak.cn/adma/nwe.php*notredirect=*O
  • http://www.business.hsbc.co.uk/1/2/bib/personal
  • https://*.cedacri.it/*
  • https://*creval.it/login2007/loginSiciliano.asp*
  • https://*gruppocarige.it/*/jsp/login.jsp*
  • https://*iwbank.it/private/index_pub.jhtml?ID_NODE=login*
  • https://*sanpaoloimi.com/*
  • https://*tecmarket.it/tmibbwebsecurity/*/otherauth/defaultPP.aspx
  • https://bancaincasa.sba.bcc.it/*
  • https://bancopostaonline.poste.it/*
  • https://bancopostaonline.poste.it/*
  • https://banking.*.de/cgi/ueberweisung.cgi/*
  • https://banklinknet2.cariparma.it/*
  • https://banklinknet2.cariparma.it/NET2/Log*
  • https://corporate.bancatoscana.it/*
  • https://corporate.friuladria.it/*
  • https://corporate.friuladria.it/NET2/Log*
  • https://ebanking.clarisbanca.it/JMCPortale/WebBrowsers/Layout/*
  • https://ebanking.clarisbanca.it/jsp/clarisbanca.sec*
  • https://hb.quiubi.it/newSSO/x11logon.htm
  • https://homebanking.cariparma.it/*
  • https://homebanking.cariparma.it/HBPR/Login
  • https://homebanking.cariparma.it/HBPR/hbdoc/LoginApplicazione.jsp
  • https://homebanking.cariparma.it/HBPR/images/ElencoPrimoAccesso1.JPG
  • https://internetbanking.gad.de/banking/*
  • https://pb.friuladria.it/BPFA/Home
  • https://pb.friuladria.it/BPFA/Login
  • https://privati.internetbanking.bancaintesa.it/sm/login/IN/box_login.jsp
  • https://scrigno.popso.it/*
  • https://servizi.allianzbank.it/*
  • https://web.secservizi.it/siteminderagent/forms/login.fcc
  • https://www.bancamediolanum.it/*
  • https://www.business.hsbc.co.uk/1/2/bibi/Login
  • https://www.citibank.de/*/jba/mp#/SubmitRecap.do
  • https://www.credem.it/OneToOne/ebank/functions/home/*
  • https://www.credem.it/OneToOne/ebank/functions/login/loginChecker.jsp*
  • https://www.csebanking.it/ibportal/home-LOGIN_CLIENTE.do*
  • https://www.gbw3.it*
  • https://www.gruppocarige.it/vbank/servlet/*
  • https://www.isideonline.it/*
  • https://www.isideonline.it/relaxbankingwas/sso*Dispatcher*
  • https://www.poste.it/online/personale/login*
  • https://www.sella.it/AuthenticationDelegatedServlet

It attempts to steal information from the following banks and/or other financial institutions:

  • Alfabank
  • Allianz Bank
  • Banca Euromobiliare
  • Banca Generali
  • Banca Intesa
  • Banca Mediolanum
  • Banca Toscana
  • Banca in Casa
  • CSE
  • Cariparma
  • Cariprato
  • Cedacri
  • Cim Italia
  • Citibank
  • Clarisbanca
  • Credem
  • Creval
  • Facebook
  • Fideuram
  • Fineco
  • Friuladria
  • GAD
  • Gruppo Carige
  • HSBC
  • IW Bank
  • Iside
  • McAfee
  • Microsoft
  • PosteItaliane
  • Qui UBI
  • SEB
  • Sanpaoloimi
  • Scrigno
  • Secservizi
  • Unipol Banca

Stolen Information

The stolen information is saved in the following file:

  • %System%\lowsec\user.ds

(Note: %System% is the Windows system folder, which is usually C:\Windows\System on Windows 98 and ME, C:\WINNT\System32 on Windows NT and 2000, or C:\Windows\System32 on Windows XP and Server 2003.)

It sends the gathered information via HTTP POST to the following URL:

  • http://{BLOCKED}zbilnyak.cn/ittit/tutuliti.php

Other Details

This spyware checks for the presence of the following processes which are related to Outpost Personal Firewall and ZoneLabs Firewall Client:

  • outpost.exe
  • zlclient.exe

It terminates if either of the said processes exist. This is to ensure that it runs uninterrupted. It also has rootkit capabilities, which enables it to hide its processes and files from the user.

Variant Information

This spyware has the following MD5 hashes:

  • 9923e2c8b4615e34a551c493105f2b6b

It has the following SHA1 hashes:

  • 97d8a8d1e971dcbcbe8fabe7bce4cff51633a38c

  SOLUTION

Minimum Scan Engine:

8.900

VSAPI OPR PATTERN File:

7.382.04

VSAPI OPR PATTERN Date:

14 Aug 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

Identify and delete files detected as TSPY_ZBOT.BSN using the Recovery Console

[ Learn More ]

Step 3

Restore this modified 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_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon
    • From: Userinit=%System%\userinit.exe, %System%\sdra64.exe,
      To: %System%\userinit.exe,

Step 4

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_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Network
    • UID={Computer name}_{Random numbers}
  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile
    • EnableFirewall=0

Step 5

Scan your computer with your Trend Micro product to delete files detected as TSPY_ZBOT.BSN. 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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