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TROJ_ZBOT.EKA

October 08, 2012
 Analysis by: Marfel Tiamzon
 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


Once users access any of the monitored sites, it starts logging keystrokes. 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:

106,496 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

17 Aug 2010

Infection Points

This Trojan arrives as a file downloaded from the following URLs:

  • http://{BLOCKED}ry.ru/{BLOCKED}uiopasdfghjklzxcvbnm0123456789/help/help.exe

Installation

This Trojan drops the following files:

  • %Application Data%\{random1}\{random}.exe
  • %Application Data%\{random2}\{random}.epn

(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 creates the following folders:

  • %Application Data%\{random1}
  • %Application Data%\{random2}

(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.)

Autostart Technique

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

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
{5BEFF50D-D6EE-01EC-61D4-279E7A06BA6C} = %Application Data%\{random1}\{random}.exe

Other System Modifications

This Trojan adds the following registry keys as part of its installation routine:

HKEY_CURRENT_USER\Software\Microsoft
{random} =

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

Information Theft

This Trojan accesses the following site to download its configuration file:

  • http://{BLOCKED}ry.ru/{BLOCKED}uiopasdfghjklzxcvbnm0123456789/help/help.msc

Once users access any of the monitored sites, it starts logging keystrokes.

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:

  • *.de/portal/portal/*
  • *.microsoft.com/*
  • */firmenkunden/*
  • */module/*
  • */privatebanking/*
  • */privatkunden/*
  • *business.hsbc.co.uk*
  • *business.hsbc.co.uk*cmd_further_transactions_search*
  • *business.hsbc.co.uk/1/2/!ut/p/kcxml/*cmd_account_list_more_details*
  • *business.hsbc.co.uk/1/2/!ut/p/kcxml/*cmd_beneficiarylist*
  • *business.hsbc.co.uk/1/2/!ut/p/kcxml/*cmd_choose_beneficiary_type*
  • *business.hsbc.co.uk/1/2/!ut/p/kcxml/*cmd_confirm_Payment_bill*
  • *business.hsbc.co.uk/1/2/!ut/p/kcxml/*cmd_force*
  • *business.hsbc.co.uk/1/2/!ut/p/kcxml/*cmd_non_majorben_input*
  • *business.hsbc.co.uk/1/2/!ut/p/kcxml/*cmd_verify_bill_payment_minorben_continue*
  • *business.hsbc.co.uk/1/2/online-services/accounts/account-list;jsessionid=*
  • *business.hsbc.co.uk/1/2/online-services/accounts/transactions;jsessionid=*
  • *business.hsbc.co.uk/1/2/online-services/payments-home/bill-payment;jsessionid=*
  • *business.hsbc.co.uk/1/2/online-services/payments-home;jsessionid=*
  • *cmd_DownloadBackToTransactionHistoryCommand*
  • *cmd_OnSelectDateThsTransactionsCommand*
  • *hsbc.co.uk*
  • *hsbc.co.uk/1/2/*OnSavingsInformationCommand*
  • *hsbc.co.uk/1/2/*cmd_InitialThirdPartyPaymentCommand*
  • *hsbc.co.uk/1/2/*cmd_NewThirdPartyPaymentCommand*
  • *hsbc.co.uk/1/2/*cmd_OnMakePaymtToThirdPartyCommand*
  • *hsbc.co.uk/1/2/*cmd_OnMakeTransferCommand*
  • *hsbc.co.uk/1/2/*cmd_OnMakeTransferConfirmCommand*
  • *hsbc.co.uk/1/2/*cmd_OnMakeTransferVerifyCommand*
  • *hsbc.co.uk/1/2/HSBCINTEGRATION/CAM*
  • *hsbc.co.uk/1/2/personal/internet-banking/payments;jsessionid=*
  • *hsbc.co.uk/1/2/personal/internet-banking/recent-transaction;jsessionid*
  • *hsbc.co.uk/1/2/personal/internet-banking/transfer;jsessionid=*
  • *hsbc.co.uk/1/2/personal/internet-banking;jsessionid=*
  • http://www.business.hsbc.co.uk/1/2/bib/personal
  • http://www.hsbc.co.uk/1/2/personal/internet-banking/popups/business-internet-banking-rapport*
  • https://*barclays.co.uk*
  • https://*commerzbanking.de*
  • https://banking.*/cgi/_euueberweisung.cgi*
  • https://banking.*/cgi/_sepaueberweisung.cgi*
  • https://banking.*/cgi/anfang.cgi*
  • https://banking.*/cgi/euuebereintrag.cgi*
  • https://banking.*/cgi/euueberfrage.cgi*
  • https://banking.*/cgi/euueberweisung.cgi*
  • https://banking.*/cgi/finanzstatus.cgi*
  • https://banking.*/cgi/kontodetails.cgi*
  • https://banking.*/cgi/login.cgi*
  • https://banking.*/cgi/sepauebereintrag.cgi*
  • https://banking.*/cgi/sepaueberfrage.cgi*
  • https://banking.*/cgi/uebereintrag.cgi*
  • https://banking.*/cgi/umsatz.cgi*
  • https://banking.*/cgi/umswahl.cgi*
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/barclays.co.uk/sbarclays.js
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/business.hsbc.co.uk/accountlist.js
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/business.hsbc.co.uk/billpayment.js
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/business.hsbc.co.uk/cmdaccountlistmoredetails.js
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/business.hsbc.co.uk/cmdbeneficiarylist.js
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/business.hsbc.co.uk/cmdchoosebeneficiarytype.js
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/business.hsbc.co.uk/cmdconfirmPaymentbill.js
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/business.hsbc.co.uk/cmdnonmajorbeninput.js
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/business.hsbc.co.uk/cmdverifybillpaymentminorbencontinue.js
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/business.hsbc.co.uk/paymentshome.js
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/business.hsbc.co.uk/transactions.js
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/caixaebanking.cgd.pt/ConfirmaTransferenciaInterna.js
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/caixaebanking.cgd.pt/ExecTransferenciaInterna.js
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/caixaebanking.cgd.pt/Main.js
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/caixaebanking.cgd.pt/Movimentos.js
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/caixaebanking.cgd.pt/PosicaoGlobal.js
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/caixaebanking.cgd.pt/Saldo.js
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/caixaebanking.cgd.pt/TransferenciaInterbancaria.js
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/caixaebanking.cgd.pt/TransferenciaInterna.js
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/caixaebanking.cgd.pt/ValoresAguardarCobranca.js
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/caixaebanking.cgd.pt/login.js
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/commerzbanking.de/
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/commerzbanking.de/script.js
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/fiducia.de/script.js
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/hsbc.co.uk/acdetails.js
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/hsbc.co.uk/main.js
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/hsbc.co.uk/mainpayments.js
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/hsbc.co.uk/step1.js
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/hsbc.co.uk/step2.js
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/hsbc.co.uk/step34.js
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/hsbc.co.uk/transaction.js
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/hsbc.co.uk/transaction.js
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/hsbc.co.uk/transfer.js
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/hsbc.co.uk/transfer_step1.js
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/hsbc.co.uk/transfer_step2.js
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/hsbc.co.uk/transfer_step3.js
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/montepio.pt/ctaOrdemMovimentosResultadoDC57.js
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/montepio.pt/ctaOrdemSaldos.js
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/montepio.pt/ctaOrdemSaldosResultado.js
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/montepio.pt/executa.js
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/montepio.pt/pedidoDownloadMovimentos.js
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/montepio.pt/posicaoIntegrada.js
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/montepio.pt/subscricaoDownloadMovimentos.js
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/montepio.pt/transferenciasContasInterbancarias.js
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/montepio.pt/transferenciasContasInterbancariasResultado.js
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/montepio.pt/transferenciasContasInterbancariasValidacao.js
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/montepio.pt/transferenciasInternacionais.js
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/montepio.pt/transferenciasInternacionaisResultado.js
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/montepio.pt/transferenciasInternacionaisSeleccao.js
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/montepio.pt/transferenciasInternacionaisValidacao.js
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/sparkasse.cgi/_euueberweisung.js
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/sparkasse.cgi/_sepaueberweisung.js
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/sparkasse.cgi/euuebereintrag.js
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/sparkasse.cgi/euueberfrage.js
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/sparkasse.cgi/euueberweisung.js
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/sparkasse.cgi/finanzstatus.js
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/sparkasse.cgi/kontodetails.js
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/sparkasse.cgi/login.js
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/sparkasse.cgi/sepauebereintrag.js
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/sparkasse.cgi/sepaueberfrage.js
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/sparkasse.cgi/sepaueberweisung.js
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/sparkasse.cgi/uebereint
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/sparkasse.cgi/umsatz.js
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/sparkasse.cgi/umswahl.js
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/targobank.de/stargobank.js
  • https://bankingsparkasseportal.com/https.html
  • https://caixaebanking.cgd.pt*
  • https://caixaebanking.cgd.pt/cebApp/ConfirmaTransferenciaInterna.action*
  • https://caixaebanking.cgd.pt/cebApp/ExecTransferenciaInterna.action*
  • https://caixaebanking.cgd.pt/cebApp/Login_execute.action*
  • https://caixaebanking.cgd.pt/cebApp/Login_input.action*
  • https://caixaebanking.cgd.pt/cebApp/Main.action*
  • https://caixaebanking.cgd.pt/cebApp/Movimentos.action*
  • https://caixaebanking.cgd.pt/cebApp/PosicaoGlobal.action*
  • https://caixaebanking.cgd.pt/cebApp/Saldo.action*
  • https://caixaebanking.cgd.pt/cebApp/TransferenciaInterbancaria.action*
  • https://caixaebanking.cgd.pt/cebApp/TransferenciaInterna.actio*
  • https://caixaebanking.cgd.pt/cebApp/ValoresAguardarCobranca.action*
  • https://finanzportal.fiducia.de*
  • https://net24.montepio.pt/Net24-Web/func/contasordem/ctaOrdemMovimentosNRegistos.jsp*
  • https://net24.montepio.pt/Net24-Web/func/contasordem/ctaOrdemMovimentosResultadoDC57.jsp*
  • https://net24.montepio.pt/Net24-Web/func/contasordem/ctaOrdemSaldos.jsp*
  • https://net24.montepio.pt/Net24-Web/func/contasordem/ctaOrdemSaldosResultado.jsp*
  • https://net24.montepio.pt/Net24-Web/func/contasordem/pedidoDownloadMovimentos.jsp*
  • https://net24.montepio.pt/Net24-Web/func/contasordem/posicaoIntegrada.jsp*
  • https://net24.montepio.pt/Net24-Web/func/contasordem/subscricaoDownloadMovimentos.jsp*
  • https://net24.montepio.pt/Net24-Web/func/homePages/executa.jsp*
  • https://net24.montepio.pt/Net24-Web/func/transferencias/transferenciasContasInterbancarias.jsp*
  • https://net24.montepio.pt/Net24-Web/func/transferencias/transferenciasContasInterbancariasResultado.jsp*
  • https://net24.montepio.pt/Net24-Web/func/transferencias/transferenciasContasInterbancariasValidacao.jsp*
  • https://net24.montepio.pt/Net24-Web/func/transferencias/transferenciasInternacionais.jsp*
  • https://net24.montepio.pt/Net24-Web/func/transferencias/transferenciasInternacionaisResultado.jsp*
  • https://net24.montepio.pt/Net24-Web/func/transferencias/transferenciasInternacionaisSeleccao.jsp*
  • https://net24.montepio.pt/Net24-Web/func/transferencias/transferenciasInternacionaisValidacao.jsp*
  • https://www.gruposantander.es/*
  • https://www.targobank.de/de/banque/situation_financiere.cgi*
  • https://www.targobank.de/de/online-banking/login.cgi*

Note that the contents of the file, hence the list of websites to monitor, may change any time.

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

  • ANZ
  • Barclays
  • Commerzbank
  • Fiducia
  • HSBC
  • Microsoft
  • Raiffeisen
  • SEB
  • Santander

Stolen Information

This Trojan sends the gathered information via HTTP POST to the following URL:

  • http://{BLOCKED}ry.ru/{BLOCKED}uiopasdfghjklzxcvbnm0123456789/help/resource.php

Variant Information

This Trojan has the following MD5 hashes:

  • 0fceab63cdb6fad9cf9a21756dfa1f83

It has the following SHA1 hashes:

  • 3be5ab4fe09428f59894917553e5839c62f49131

  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

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 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\Windows\CurrentVersion\Run
    • {5BEFF50D-D6EE-01EC-61D4-279E7A06BA6C}=%Application Data%\{random1}\{random}.exe

Step 4

Search and delete these folders

[ 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 5

Scan your computer with your Trend Micro product to delete files detected as TROJ_ZBOT.EKA. 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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