TROJ_ZBOT.BYM

October 08, 2012
 Analysis by: Marfel Tiamzon
 PLATFORM:

Windows 2000, XP, Server 2003

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

  • 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 get information from a list of banks or financial institutions.

  TECHNICAL DETAILS

File Size:

117,736 b bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

01 Aug 2010

Infection Points

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

  • http://drtyyyt.ru/zeustracker.abuse.ch/cgi-bin/ch.exe

Installation

This Trojan 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}.exe

It drops the following files:

  • %Application Data%\{random1}.exe
  • %Application Data%\{random2}.vyy

(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 Trojan adds the following registry keys:

HKEY_CURRENT_USER\Software\Microsoft\
{random}
{default} =  

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 accesses the following site to download its configuration file:

  • http://noprtus.ru/zeustracker.bin
  • http://drtyyyt.ru/zeustracker.abuse.ch/cgi-bin/ch.png

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/*
  • *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=*
  • *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://www.gruposantander.es/*
  • 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/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/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_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/sparkasse.portal/script.js
  • https://bankingsparkasseportal.com/azImUtfwe0fdccq20d0dcac0cz01/targobank.de/stargobank.js
  • https://bankingsparkasseportal.com/https.html
  • https://bankingsparkasseportal.com/https.html
  • https://bankingsparkasseportal.com/https.html
  • https://bankingsparkasseportal.com/https.html
  • https://bankingsparkasseportal.com/https.html
  • https://bankingsparkasseportal.com/https.html
  • https://bankingsparkasseportal.com/https.html
  • https://bankingsparkasseportal.com/https.html
  • https://bankingsparkasseportal.com/https.html
  • https://bankingsparkasseportal.com/https.html
  • https://bankingsparkasseportal.com/https.html
  • 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*

The downloaded file contains information where the malware can download an updated copy of itself, and where to send its stolen data.

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

Attacked Entities

This Trojan attempts to get information from a list of banks or financial institutions.

Stolen Information

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

  • http://{BLOCKED}t.ru/zeustracker.abuse.ch/cgi-bin/blocklist.php

Other Details

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

  • Attempts to retrieve information from the following list of banks/financial institutions: ANZ, Commerzbank, Fiducia, HSBC, Microsoft, Raiffeisen, SEB and Santander

Variant Information

This Trojan has the following MD5 hashes:

  • 9dce61f925e128d818d19545ca681236

It has the following SHA1 hashes:

  • 44b1d7f4c73c04d6dc8ce5acbd6ec2a1815bceb2

  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 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}.exe

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
    • {random}

Step 4

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