TROJ_VILSEL.AE

October 08, 2012
 Analysis by: Kathleen Notario
 PLATFORM:

Windows 2000, XP, Server 2003

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

It 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.

  TECHNICAL DETAILS

File Size:

1,926,656 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

08 Oct 2009

Arrival Details

This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Other System Modifications

This Trojan adds the following registry keys:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\WindowsUpdate\
ServiceWinlogom

It adds the following registry entries:

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Download
RunInvalidSignatures = 1

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Security Center
FirewallDisableNotify = 1

It modifies the following registry entries:

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Download
CheckExeSignatures = no

(Note: The default value data of the said registry entry is yes.)

Dropping Routine

This Trojan drops the following files:

  • %System%\NOVAINFECCAO.log

(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.)

Information Theft

This Trojan monitors the Internet Explorer (IE) activities of the affected system, specifically the address 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 and/or title bar:

  • BRB Banknet
  • Banco Bradesco S.A.
  • Banco Santander S.A.
  • Banco do Brasil S.A.
  • Banrisul
  • Caixa Economica Federal S.A.
  • HSBC BANK BRASIL S.A.
  • HSBC InternetBanking
  • Itau Bankline
  • http://authmail.ibest.com.br/Autenticacao/autenticacao
  • http://authmail.ig.com.br/Autenticacao/autenticacao
  • http://webmail.globo.com/LoginWebmail/autenticarUsuario.ssp
  • http://www.bancobva.com.br/areas/publico/pagp/default.asp
  • http://www.bancofator.com.br/far/minhaconta.aspx
  • http://www.bancopaulista.com.br/PaulistaHB/Default.asp
  • http://www.bep.com.br/IBanking/principal.php?a=login
  • http://www.besc.com.br
  • http://www.besinvestimento.com.br/Default.aspx
  • http://www.caixa.gov.br/#
  • http://www.caixa.gov.br/_newredirect
  • http://www.fininvest.com.br
  • http://www.fininvest.com.br/hom/index.asp
  • http://www.itauprivatebank.com.br/privatebank/index.htm
  • http://www.mclass.com.br/scripts/mclass.dll/
  • http://www.santander.com.br/
  • http://www.spc.com.br/si/servlet/hlogin
  • http://www2.paranabanco.com.br/Franquia/Franqueado.aspx
  • https://bankline.itau.com.br/
  • https://bankline.itau.com.br/GRIPNET/bklcom.dll
  • https://bankline.itau.com.br/GRIPNET/gracgi.exe
  • https://bankline.itau.com.br/lgnet/cartonista/bankline.htm
  • https://bankline.itau.com.br/lgnet/itauf/bankline.htm
  • https://banklineplus.itau.com.br/GRIPNET/bklcgi.exe
  • https://banknet.brb.com.br/iBanking/
  • https://bcadirecto.bca.cv/
  • https://bcadirectoempresas.bca.cv/
  • https://binanet.bi.cv/Login.asp
  • https://binanetempresas.bi.cv/Login.asp
  • https://br.credit-suisse.com/Default.aspx
  • https://caixanetparticulares.caixa.cv/Login.asp
  • https://carrinho.americanas.com.br/portal/acom.portal?_nfpb=true&
  • https://carrinho.americanas.com.br/portal/acom.portal?_nfpb=true&portlet_payment_actionOverride=%2Fportlets%2Fpayment%2FchoosePaymentMethodAction&_windowLabel=portlet_payment
  • https://carrinho.americanas.com.br/portal/meuCadastro.portal?_nfpb=true&LoginControllerPortlet_actionOverride=%2Fportlets%2Fcustomer%2Flogin%2FenderecoPesquisarPorCep&_windowLabel=LoginControllerPortlet
  • https://carrinho.shoptime.com.br/portal/shoptime.portal?_nfpb=true&portlet_payment_actionOverride=%2Fportlets%2Fpayment%2FcreditCardValidateAction&_windowLabel=portlet_payment
  • https://chaseonline.chase.com/online/AgentFCCServlet
  • https://conexao.fininvest.com.br
  • https://conexao.fininvest.com.br/index.asp
  • https://consulta.equifax.com.br/menu.asp
  • https://ibk.banparanet.com.br/ibban/htm/pj_acesso.htm
  • https://ibpf.unibanco.com.br/unicard/
  • https://internetbanking.caixa.gov.br/
  • https://internetbanking.caixa.gov.br/SIIBC/siwinCtrl
  • https://itaubankline.itau.com.br/
  • https://itaubankline.itau.com.br/GRIPNET/bklcom.dll
  • https://login.live.com/ppsecure/post.srf?
  • https://nel.bnb.gov.br/
  • https://netbanking.brp.com.br/NetBanking/c_brp.asp?acao=Logon
  • https://netbanking2.banespa.com.br/
  • https://portal.credicardciti.com.br/wps/ControllerBaseServlet
  • https://segura.besc.com.br/cwsasp/cwsn.asp
  • https://segura.besc.com.br/cwsasp/cwsn.asp/
  • https://servicos.fininvest.com.br
  • https://servicos.spc.org.br/pls/spc9765/spcindex.html
  • https://servicos.spc.org.br/spc/controleacesso/autenticacao/passphrase.action
  • https://sitenet.serasa.com.br/Logon/Logon
  • https://smail-mia.terra.com.br/atmail.php?ret
  • https://smail.terra.com.br/atmail.php?ret
  • https://smu.jpmorgan.com/siteminderagent/forms/smu/gcp/login.fcc?
  • https://wealth.goldman.com/login/login_b.cgi
  • https://webid2.gs.com/cgi-bin/external/authenticate.cgi
  • https://ww8.banrisul.com.br/brb/default.htm
  • https://ww8.banrisul.com.br/brb/link/BrbwE0hw_MsgDialog.aspx
  • https://www.bancogmac.com.br/homebank/logon.do
  • https://www.bbmnetbanking.com.br/evhtml.cgi?FrmNumConta
  • https://www.ccfacil.com.br/Login.asp?
  • https://www.edivan.com.br/CtrlAcesso_geral.asp
  • https://www.extra.com.br/Pagamento/infoComplementarFormaPagamento.aspx
  • https://www.febraban.org.br/default.asp
  • https://www.fs.ml.com/login/Login.asp?site=MLOL
  • https://www.google.com/accounts/ServiceLoginAuth?service=
  • https://www.indusval.com.br/tbib/ib_MICROSOFT.php
  • https://www.intlmlol.ml.com/logon/logon.exe
  • https://www.latinamerica.citibank.com/BRGCB/JSO/signon/ProcessUsernameSignon.do
  • https://www.latinamerica.citibank.com/BRGCB/LATAM/common/AccountInfo.do
  • https://www.latinamerica.citibank.com/BRGCB/jba/mp6/SubmitRecap.do
  • https://www.magazineluiza.com.br/Seguro/caixa/ins_caixa.asp
  • https://www.opportunity.com.br/Servicos/Login.aspx?
  • https://www.paodeacucar.com.br/pagamento/processaFechamento.asp
  • https://www.pontofrio.com.br/cgi-bin/loja_segura.pl
  • https://www.prospertrade.com.br/acesso_cliente.asp
  • https://www.santandernet.com.br/EfetuarLogin_Intermediaria_New.asp
  • https://www.santandernet.com.br/IBPF/Home.asp
  • https://www.santandernet.com.br/IBPF/LoginEscolhaUsuarios.asp
  • https://www.santandernet.com.br/IBPF/transacoes/MPS/mps_WinXP.asp
  • https://www.santandernet.com.br/IBPF/transacoes/MPS/mps_WinXpInf.asp
  • https://www.santandernet.com.br/IBPF_Logout.asp
  • https://www.santandernet.com.br/default.asp?txtAgencia=
  • https://www.santandernet.com.br/logout.asp?oG=u&oA=site
  • https://www.santandernet.com.br/paginas/CRM/Processa.asp
  • https://www.tam.com.br/b2c/jsp/EfetuarPagamentoCCredito.jhtml
  • https://www.tribancoonline.com.br/tribancoib/servlet/SvLogin
  • https://www2.abcbrasil.com.br/ABCBanking/acesso/Login.aspx
  • https://www2.bancobrasil.com.br/aapf/login.jsp?aapf.IDH=sim
  • https://www2.bancobrasil.com.br/aapf/login.jsp?aapf.IDH=sim&perfil=1
  • https://www2.bnpparibas.com.br/psso/WAgent.dll?Login0
  • https://www2.extra.com.br/Usuario/Cadastro.aspx?userType=F&ReturnUrl=https://www2.extra.com.br/Pagamento/ListaEnderecos.aspx?Next=Pagamento.aspx
  • https://www2.infoseg.gov.br/infoseg/do/TecladoVirtualAction
  • https://www2.rural.com.br/RuralIBank/principal.jsp
  • https://www2.rural.com.br/RuralIBank/validaLogin.jsp
  • https://www2.rural.com.br/RuralIBank/validaSenha.jsp
  • https://www2.submarino.com.br/Payment.aspx
  • https://wwws.alfanet.com.br/Transacional/rdr_validacao.asp?
  • https://wwws.bancoamazonia.com.br/prelogin.asp?
  • https://wwws.banese.com.br/netbanking
  • https://wwws.banese.com.br/netbanking/servlet
  • https://wwws.banese.com.br/netbanking/servlet/Conf
  • https://wwws.banese.com.br/netbanking/servlet/ConsDocEletronico
  • https://wwws.banese.com.br/netbanking/servlet/ConsPagtoConv
  • https://wwws.banese.com.br/netbanking/servlet/Login
  • https://wwws.banestes.com.br/cgi-bin/Login
  • https://wwws.gravames.com.br/gravames/
  • https://wwws.nossacaixa.com.br/CarregarConta.asp
  • https://wwws.nossacaixa.com.br/bemvindo.asp
  • https://wwws2.hsbc.com.br/
  • https://wwws3.hsbc.com.br/
  • https://wwws3.hsbc.com.br/HOB-MEUHSBC/servlets/LoginMeuHSBC
  • https://wwws3.hsbc.com.br/HOB-MEUHSBC/servlets/LoginMeuHSBC?CPF=
  • https://wwws3.hsbc.com.br/HOB-MEUHSBCAPP/servlets/RedirectMeuHSBC?fin=0&trans=MHERF01&ServletState=50&LinkExecucao=/HOB-CCORRENTE
  • https://wwws3.hsbc.com.br/HOB-MEUHSBCAPP/servlets/ServletMeuHSBC?ServletState=0
  • https://wwws3.hsbc.com.br/HOB-MEUHSBCAUX/servlets/LogoutMeuHSBC?urlRedirect=/HOB/logincrm/meuhsbc/logout.html?
  • https://wwws5.hsbc.com.br/
  • https://wwwss.bradesco.com.br/scripts/ib2k1.dll/LOGIN
  • https://wwwss.bradesco.com.br/scripts/ib2k1.dll/TAC/ENTRADASENHA?CTL
  • https://wwwss.bradesco.com.br/scripts/ib2k1.dll/TAC/VRFSENHAATUAL

The spoofed login overlaps the legitimate login area of the website, thus tricking the user into thinking that it is part of the IE window. The spoofed login page is located in a fixed area of the legitimate website. The said routine tricks the user into giving out sensitive account-related information. It then logs keystrokes entered by the user in the user name and password fields of the spoofed login page.

It 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 from the following banks and/or other financial institutions:

  • Alfa Net
  • BCA Directo
  • BES Investimento
  • BESC
  • BNP Paribas
  • BRB Banknet
  • Banco ABC Brasil
  • Banco BBM
  • Banco BVA
  • Banco Bradesco
  • Banco Fator
  • Banco GMAC
  • Banco Indusval
  • Banco Interatlântico
  • Banco Itau
  • Banco Paulista
  • Banco Rural
  • Banco Santander
  • Banco da Amazônia
  • Banco do Brasil
  • Banese
  • Banespa
  • Banestes
  • Banparanet
  • Banrisul
  • Caixa
  • Caixa Economica Federal
  • Chase
  • Citibank
  • Credicard Citi
  • Credit Suisse
  • EDIVAN
  • Equifax
  • Federação Brasileira de Bancos
  • Fininvest
  • Goldman
  • HSBC
  • INFOSEG
  • JP Morgan
  • Magazine Luiza
  • Nossa Caixa
  • PontoFrio
  • Prosperatrade
  • Pão de Açúcar
  • Serasa
  • Tribanco
  • Unibanco

Drop Points

This Trojan sends the information it gathers to the following email addresses:

  • {BLOCKED}ed@uol.com.br
  • {BLOCKED}na.fm@terra.com.br
  • {BLOCKED}noschuch@terra.com.br
  • {BLOCKED}ia-araujo@uol.com.br
  • {BLOCKED}@oticasopcao.com
  • {BLOCKED}00000001@hotmail.com.br
  • {BLOCKED}00000002@hotmail.com.br
  • {BLOCKED}00000003@hotmail.com.br
  • {BLOCKED}piedade@oticasopcao.com
  • {BLOCKED}io@oticasopcao.com
  • {BLOCKED}n@oticasopcao.com
  • {BLOCKED}@oticasopcao.com
  • {BLOCKED}@oticasopcao.com
  • {BLOCKED}lessa@terra.com.br
  • {BLOCKED}afrigo@terra.com.br
  • {BLOCKED}filho@terra.com.br
  • {BLOCKED}@oticasopcao.com
  • {BLOCKED}ldo@utranet.com.br
  • {BLOCKED}a@oticasopcao.com
  • {BLOCKED}@oticasopcao.com
  • {BLOCKED}e@oticasopcao.com
  • {BLOCKED}carara@terra.com.br
  • {BLOCKED}olesta@terra.com.br
  • {BLOCKED}e@oticasopcao.com
  • {BLOCKED}@terra.com.br
  • {BLOCKED}machiness@gmail.com
  • {BLOCKED}dolfo@terra.com.br
  • {BLOCKED}im@oticasopcao.com
  • {BLOCKED}oticasopcao.com
  • {BLOCKED}ro@oticasopcao.com
  • {BLOCKED}@oticasopcao.com
  • {BLOCKED}ne@oticasopcao.com
  • {BLOCKED}arasantos@oticasopcao.com
  • {BLOCKED}da@oticasopcao.com
  • {BLOCKED}@oticasopcao.com
  • {BLOCKED}oticasopcao.com
  • {BLOCKED}aoliveira@oticasopcao.com
  • {BLOCKED}na@oticasopcao.com
  • {BLOCKED}i026@terra.com.br
  • {BLOCKED}@terra.com.br
  • {BLOCKED}ssc@oticasopcao.com
  • {BLOCKED}s@oticasopcao.com
  • {BLOCKED}roberto@oticasopcao.com
  • {BLOCKED}cao@oticasopcao.com
  • {BLOCKED}eis@oticasopcao.com
  • {BLOCKED}o@oticasopcao.com
  • {BLOCKED}ne@oticasopcao.com
  • {BLOCKED}l@oticasopcao.com
  • {BLOCKED}terra.com.br
  • {BLOCKED}o.rh@oticasopcao.com
  • {BLOCKED}o@oticasopcao.com
  • {BLOCKED}r@oticasopcao.com

Variant Information

This Trojan has the following MD5 hashes:

  • 57b84dbf1e32261afab3827bbe6f2d57

It has the following SHA1 hashes:

  • c097986fda09dbfd75b3ab47d105cb5614ad7bc6

  SOLUTION

Minimum Scan Engine:

8.900

FIRST VSAPI PATTERN FILE:

6.521.00

FIRST VSAPI PATTERN DATE:

08 Oct 2009

VSAPI OPR PATTERN File:

7.491.00

VSAPI OPR PATTERN Date:

25 Sep 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 terminate files detected as TROJ_VILSEL.AE

[ Learn More ]
  1. If the detected file is displayed in either Windows Task Manager or Process Explorer but you cannot delete it, restart your computer in safe mode. To do this, refer to this link for the complete steps.
  2. If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.

Step 3

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\Download
    • RunInvalidSignatures=1
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Security Center
    • FirewallDisableNotify=1

Step 4

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_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate
    • ServiceWinlogom

Step 5

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_CURRENT_USER\Software\Microsoft\Internet Explorer\Download
    • From: CheckExeSignatures=no
      To: yes

Step 6

Search and delete this file

[ Learn More ]
There may be some component files that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden files and folders in the search result.
  • %System%\NOVAINFECCAO.log

Step 7

Scan your computer with your Trend Micro product to delete files detected as TROJ_VILSEL.AE. 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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