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TROJ_ZBOT.BYO

May 08, 2013
 Modified by: Sabrina Lei Sioting
 PLATFORM:

Windows 2000, XP, Server 2003

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This Trojan 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:

103,936 bytes

File Type:

PE

Memory Resident:

Yes

Initial Samples Received Date:

31 Jul 2010

Payload:

Drops files, Downloads files, Steals information

Installation

This Trojan drops the following files:

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

(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming on Windows Vista and 7.)

It creates the following folders with attributes set to System and Hidden to prevent users from discovering and removing its components:

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

(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming on Windows Vista and 7.)

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

  • explorer.exe

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

Download Routine

This Trojan accesses the following websites to download files:

  • http://{BLOCKED}andi.ru/localhost/nat.bin

Information Theft

This Trojan 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 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:

  • !*.microsoft.com/*https://www.gruposantander.es/*
  • *.de/portal/portal/*
  • *business.hsbc.co.uk*
  • *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_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=*
  • 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/sepaueberweisung.cgi*
  • https://banking.*/cgi/uebereintrag.cgi*
  • https://banking.*/cgi/umsatz.cgi*
  • https://banking.*/cgi/umswahl.cgi*
  • 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/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/executa.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/kontodetails.js
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/sparkasse.cgi/sepaueberfrage.js
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/sparkasse.cgi/uebereintrag.js
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/sparkasse.cgi/umsatz.js
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/sparkasse.cgi/umswahl.js
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/sparkasse.portal/script.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/homePages/executa.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.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
  • Commerzbank
  • Fiducia
  • HSBC
  • Raiffeisen
  • SEB
  • Santander

Stolen Information

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

  • http://{BLOCKED}andi.ru/localhost/server.php

Other Details

Based on analysis of the codes, it has the following capabilities:

  • It arrives as a file downloaded from the following URL: http://{BLOCKED}andi.ru/localhost/nat.exe

It did not exhibit backdoor routines during testing.

Variant Information

This Trojan has the following MD5 hashes:

  • 4be208be562f9fb6fe1ec071498f64b8

It has the following SHA1 hashes:

  • 193d3bd90df84a2bb9008b1eafb39de8f510bcbd

  SOLUTION

Minimum Scan Engine:

8.900

VSAPI PATTERN File:

7.353.80

VSAPI PATTERN Date:

31 Jul 2010

VSAPI PATTERN Date:

7/31/2010 12:00:00 AM

Step 1

Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.

Step 2

Identify and delete files detected as TROJ_ZBOT.BYO using the Recovery Console

[ Learn More ]

Step 3

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

Step 5

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