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TSPY_ZBOT.GST

October 08, 2012
 Analysis by: Roland Marco Dela Paz
 PLATFORM:

Windows 2000, XP, Server 2003

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

  • Threat Type: Spyware

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW


This spyware attempts to steal information, such as user names and passwords, used when logging into certain banking or finance-related websites.

  TECHNICAL DETAILS

File Size:

145,408 bytes

File Type:

PE

Memory Resident:

Yes

Initial Samples Received Date:

22 Sep 2010

Payload:

Bypasses Windows Firewall, Downloads files

Arrival Details

This spyware may be downloaded from the following remote sites:

  • http://{BLOCKED}wave-aug.com/FE01.exe

Installation

This spyware adds the following folders:

  • %Application Data%\{random folder 1}
  • %Application Data%\{random folder 2}

(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Windows\Profiles\{user name}\Application Data on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Application Data on Windows NT, and C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000, XP, and Server 2003.)

It injects itself into the following processes running in the affected system's memory:

  • explorer.exe
  • taskhost.exe
  • taskeng.exe
  • Dwm.exe
  • wscntfy.exe
  • ctfmon.exe
  • rdpclip.exe

Autostart Technique

This spyware adds the following registry entries to enable its automatic execution at every system startup:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
{GUID} = %Application Data%\{random folder 1}\{random file name}.exe

It drops the following files:

  • %Application Data%\\{random1}\\{random}.exe - copy of itself
  • %Application Data%\{random folder 2}\{random file name} - contains encrypted stolen data

(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Windows\Profiles\{user name}\Application Data on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Application Data on Windows NT, and C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000, XP, and Server 2003.)

Other System Modifications

This spyware creates the following registry entry(ies) to bypass Windows Firewall:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile\AuthorizedApplications\
List
%Windows%\\EXPLORER.EXE = %Windows%\EXPLORER.EXE:*:Enabled:Windows Explorer

Information Theft

This spyware monitors the Internet Explorer (IE) activities of the affected system, specifically the address bar or title bar. It recreates a legitimate website with a spoofed login page if a user visits banking sites with the following strings in the address bar or title bar:

  • *.ebay.com/*eBayISAPI.dll?*
  • *.hsbc.co.uk/1/2*
  • *//mail.yandex.ru/
  • *//mail.yandex.ru/index.xml
  • *//money.yandex.ru/
  • *//money.yandex.ru/index.xml
  • */atl.osmp.ru/*
  • */login.osmp.ru/*
  • */my.ebay.com/*CurrentPage=MyeBayPersonalInfo*
  • *banquepopulaire.fr/*
  • *wellsfargo.com/*
  • http://*.osmp.ru/
  • http://caixasabadell.net/banca2/tx0011/0011.jsp
  • http://www.hsbc.co.uk/1/2/personal/internet-banking*
  • https://areasegura.banif.es/bog/bogbsn*
  • https://banca.cajaen.es/Jaen/INclient.jsp
  • https://bancaonline.openbank.es/servlet/PProxy?*
  • https://bancopostaonline.poste.it/bpol/bancoposta/formslogin.asp
  • https://banesnet.banesto.es/*/loginEmpresas.htm
  • https://banking*.anz.com/*
  • https://cardsonline-consumer.com/RBSG_Consumer/VerifyLogin.do
  • https://carnet.cajarioja.es/banca3/tx0011/0011.jsp
  • https://easyweb*.tdcanadatrust.com/servlet/*FinancialSummaryServlet*
  • https://empresas.gruposantander.es/WebEmpresas/servlet/webempresas.servlets.*
  • https://extranet.banesto.es/*/loginParticulares.htm
  • https://extranet.banesto.es/npage/OtrosLogin/LoginIBanesto.htm
  • https://hb.quiubi.it/newSSO/x11logon.htm
  • https://home.cbonline.co.uk/login.html*
  • https://home.ybonline.co.uk/login.html*
  • https://home.ybonline.co.uk/ral/loginmgr/*
  • https://home2ae.cd.citibank.ae/CappWebAppAE/producttwo/capp/action/signoncq.do
  • https://ibank.internationalbanking.barclays.com/logon/icebapplication*
  • https://intelvia.cajamurcia.es/2043/entrada/01entradaencrip.htm
  • https://internetbanking.aib.ie/hb1/roi/signon
  • https://light.webmoney.ru/default.aspx
  • https://lot-port.bcs.ru/names.nsf?#ogin*
  • https://montevia.elmonte.es/cgi-bin/INclient_2098*
  • https://oi.cajamadrid.es/CajaMadrid/oi/pt_oi/Login/login
  • https://oie.cajamadridempresas.es/CajaMadrid/oie/pt_oie/Login/login_oie_1
  • https://olb2.nationet.com/MyAccounts/frame_MyAccounts_WP2.asp*
  • https://olb2.nationet.com/signon/signon*
  • https://online*.lloydstsb.co.uk/logon.ibc
  • https://online-business.lloydstsb.co.uk/customer.ibc
  • https://online-offshore.lloydstsb.com/customer.ibc
  • https://online.wamu.com/Servicing/Servicing.aspx?targetPage=AccountSummary
  • https://online.wellsfargo.com/das/cgi-bin/session.cgi*
  • https://online.wellsfargo.com/login*
  • https://online.wellsfargo.com/signon*
  • https://onlinebanking#.wachovia.com/myAccounts.aspx?referrer=authService
  • https://onlinebanking.nationalcity.com/OLB/secure/AccountList.aspx
  • https://onlineeast#.bankofamerica.com/cgi-bin/ias/*/GotoWelcome
  • https://pastornetparticulares.bancopastor.es/SrPd*
  • https://privati.internetbanking.bancaintesa.it/sm/login/IN/box_login.jsp
  • https://probanking.procreditbank.bg/main/main.asp*
  • https://resources.chase.com/MyAccounts.aspx
  • https://rupay.com/index.php
  • https://scrigno.popso.it*
  • https://web.da-us.citibank.com/*BS_Id=MemberHomepage*
  • https://web.da-us.citibank.com/cgi-bin/citifi/portal/l/autherror.do*
  • https://web.da-us.citibank.com/cgi-bin/citifi/portal/l/l.do
  • https://web.secservizi.it/siteminderagent/forms/login.fcc
  • https://welcome23.smile.co.uk/SmileWeb/start.do
  • https://welcome27.co-operativebank.co.uk/CBIBSWeb/start.do
  • https://www#.citizensbankonline.com/*/index-wait.jsp
  • https://www#.usbank.com/internetBanking/LoginRouter
  • https://www*.banking.first-direct.com/1/2/*
  • https://www.53.com/servlet/efsonline/index.html*
  • https://www.bancajaproximaempresas.com/ControlEmpresas*
  • https://www.bancoherrero.com/es/*
  • https://www.bbvanetoffice.com/local_bdno/login_bbvanetoffice.html
  • https://www.bgnetplus.com/niloinet/login.jsp
  • https://www.caixagirona.es/cgi-bin/INclient_2030*
  • https://www.caixalaietana.es/cgi-bin/INclient_2042
  • https://www.caixaontinyent.es/cgi-bin/INclient_2045
  • https://www.caixatarragona.es/esp/sec_1/oficinacodigo.jsp
  • https://www.caja-granada.es/cgi-bin/INclient_2031
  • https://www.cajabadajoz.es/cgi-bin/INclient_6010*
  • https://www.cajacanarias.es/cgi-bin/INclient_6065
  • https://www.cajacirculo.es/ISMC/Circulo/acceso.jsp
  • https://www.cajadeavila.es/cgi-bin/INclient_6094
  • https://www.cajalaboral.com/home/acceso.asp
  • https://www.cajasoldirecto.es/2106/*
  • https://www.cajavital.es/Appserver/vitalnet*
  • https://www.ccm.es/cgi-bin/INclient_6105
  • https://www.citibank.de*
  • https://www.clavenet.net/cgi-bin/INclient_7054
  • https://www.dab-bank.com*
  • https://www.e-gold.com/acct/balance.asp*
  • https://www.e-gold.com/acct/li.asp
  • https://www.ebank.hsbc.co.uk/main/IBLogon.jsp
  • https://www.fibancmediolanum.es/BasePage.aspx*
  • https://www.gruposantander.es/*
  • https://www.gruposantander.es/bog/sbi*?ptns=acceso*
  • https://www.gruppocarige.it/grps/vbank/jsp/login.jsp
  • https://www.halifax-online.co.uk/MyAccounts/MyAccounts.aspx*
  • https://www.halifax-online.co.uk/_mem_bin/*
  • https://www.halifax-online.co.uk/_mem_bin/formslogin.asp*
  • https://www.isbank.com.tr/Internet/ControlLoader.aspx*
  • https://www.isideonline.it/relaxbanking/sso.Login*
  • https://www.iwbank.it/private/index_pub.jhtml*
  • https://www.mybank.alliance-leicester.co.uk/login/*
  • https://www.nwolb.com/Login.asp*
  • https://www.nwolb.com/Login.aspx*
  • https://www.paypal.com/*/webscr?cmd=_account
  • https://www.paypal.com/*/webscr?cmd=_login-done*
  • https://www.rbsdigital.com/Login.asp*
  • https://www.sabadellatlantico.com/es/*
  • https://www.suntrust.com/portal/server.pt*parentname=Login*
  • https://www.unicaja.es/PortalServlet*
  • https://www.uno-e.com/local_bdnt_unoe/Login_unoe2.html
  • https://www.us.hsbc.com/*
  • https://www.wellsfargo.com/*
  • https://www2.bancopopular.es/AppBPE/servlet/servin*

It accesses the following site to download its configuration file:

  • http://{BLOCKED}ave-aug.com/conf_fe01.bin
  • http://{BLOCKED}ya-my.com/conf_fe01.bin
  • http://{BLOCKED}i-test.com/conf_fe01.bin
  • http://{BLOCKED}ice-sok.com/conf_fe01.bin
  • http://{BLOCKED}a-in-uk.com/conf_fe01.bin
  • http://{BLOCKED}ka-net.com/conf_fe01.bin

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

  • AIB
  • ANZ
  • Alliance & Leicester
  • BBVA
  • BG Net Plus
  • Banca Intesa
  • Bancaja
  • Banco Herrero
  • Banco Pastor
  • Banco Popular
  • Banesto
  • Banif
  • Bank of America
  • Banque Populaire
  • Barclays
  • BrokerCreditService
  • CCM
  • Caixa Girona
  • Caixa Laietana
  • Caixa Ontinyent
  • Caixa Sabadell
  • Caixa Tarragona
  • Caja Badajoz
  • Caja Canarias
  • Caja Circulo
  • Caja Granada
  • Caja Laboral
  • Caja Madrid
  • Caja Murcia
  • Caja Vital
  • Caja de Avila
  • Caja de Jaen
  • Cajarioja
  • Cajasol
  • Chase
  • Citibank
  • Citizens
  • Clavenet
  • Clydesdale
  • Co-Operativebank
  • DAB
  • E-Gold
  • Ebay
  • Fibanc Mediolanum
  • Fifth Third
  • First Direct
  • Gruppo Carige
  • HSBC
  • Halifax
  • IS Bank
  • IW Bank
  • Iside
  • Lloyds
  • National City
  • Nationwide
  • Natwest
  • OSPM
  • Openbank
  • PayPal
  • PosteItaliane
  • Procredit
  • Qui UBI
  • RBS
  • Rupay
  • Sabadell Atlantico
  • Santander
  • Scrigno
  • Secservizi
  • Smile
  • Suntrust
  • TD Canada Trust
  • US Bank
  • Unicaja
  • Uno-E
  • Wachovia
  • Washington Mutual
  • Webmoney Keeper Light
  • Wells Fargo
  • Yandex
  • Yorkshire

Drop Points

Stolen information is uploaded to the following websites:

  • http://{BLOCKED}wave-aug.com/MIXADM/gotobot.php

Variant Information

This spyware has the following MD5 hashes:

  • 4af2ec7f2e8b7e262e45a978bf9dd82c

It has the following SHA1 hashes:

  • 7cb2f0f5e0a11643ad51bf78b4c64f2e242916bf

  SOLUTION

Minimum Scan Engine:

8.900

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

Restart in Safe Mode

[ Learn More ]

Step 3

Search and delete this folder

[ Learn More ]
Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden folders in the search result. %Application Data%\{random1}
%Application Data%\{random2}

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_CURRENT_USER\Software\Microsoft\Internet Explorer\PhishingFilter
    • Enabled=0
  • In HKEY_CURRENT_USER\Software\Microsoft\InternetExplorer\PhishingFilter
    • EnabledV8=0
  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List
    • %WINDOWS%\EXPLORER.EXE =%WINDOWS%\EXPLORER.EXE:*:Enabled:Windows Explorer
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
    • {GUID of mount point of %Windows%} =%Application Data%

Step 5

Delete this registry key

[ 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\
    • {random}

Step 6

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