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TROJ_ZBOT.BAY

October 08, 2012
 Analysis by: Marfel Tiamzon
 PLATFORM:

Windows 2000, XP, Server 2003

 OVERALL RISK RATING:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:
 SYSTEM IMPACT RATING:

  • 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. 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.

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

  TECHNICAL DETAILS

File Size:

152,064 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

07 Aug 2010

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
{4F7B03F1-D465-7A2F-E893-EA6755CBAD8A} = %Application Data%\{random1}\{random}.exe

Other System Modifications

This Trojan adds the following registry keys:

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

Dropping Routine

This Trojan drops the following files:

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

(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.)

Download Routine

This Trojan accesses the following websites to download files:

  • http://{BLOCKED}ojaeghaopuegeudeeb.com/xman/spm1.bin
  • http://{BLOCKED}ojaeghaopuegeudeeb.com/bin/orahxaxsp1.bin
  • http://{BLOCKED}eitaepiephohthieleibesha.com/bin/orahxaxsp1.bin
  • http://{BLOCKED}nmbnxcbjbh3hbhbdhjb3l4kjbn.com/bin/orahxasp1.bin
  • http://{BLOCKED}nzytgero34xbhsbc8484kk.com/bin/orahxasp1.bin
  • http://{BLOCKED}llakjshbeyrv3421jbs88xc.com/bin/orahxasp1.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 accesses the following site to download its configuration file:

  • http://teughoojaeghaopuegeudeeb.com/xman/spm1.bin
  • http://teughoojaeghaopuegeudeeb.com/bin/orahxaxsp1.bin
  • http://eitaepiephohthieleibesha.com/bin/orahxaxsp1.bin
  • http://nmbnxcbjbh3hbhbdhjb3l4kjbn.com/bin/orahxasp1.bin
  • http://nzytgero34xbhsbc8484kk.com/bin/orahxasp1.bin
  • http://llakjshbeyrv3421jbs88xc.com/bin/orahxasp1.bin

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:

  • *.americanexpress.com/myca/acctsumm/us/*
  • *.microsoft.com/*
  • */atl.osmp.ru/*
  • */login.osmp.ru/*
  • *EBC_EBC1961*
  • *EBC_EBC1961/EBC_NEC/RSAEncrypt.js*
  • *ebc_ebc1961*
  • *ebc_ebc1961/EBC_NEC/RSAEncrypt.js*
  • *hbnet/login/login.aspx?organization*
  • http*.53.com*
  • http*.53.com*RSAScript.js*
  • http*.webcashmanager.com*Login*
  • http*.webcashmgmt.com*Login*
  • http*/phcp/econnection/login/js/login.htm*
  • http*/phcp/servlet*Login*
  • http*/wcmfd/*Login*
  • http*/wcmfd/js/LoginCSS.js*
  • http*bolb.associatedbank.com*
  • http*bolb.associatedbank.com/js/jquery.js*
  • http*business-eb.ibanking-services.com*general.js*
  • http*business-eb.ibanking-services.com/K1/*login*jsp*
  • http*ebanking-services.com/*
  • http*ebanking-services.com/AUTH/WebResource.axd*
  • http*scripts/injScp.js*
  • http*sso.uboc.com/js/ub-common.js*
  • http*sso.uboc.com/obc/forms/login.fcc*
  • http*treasury.pncbank.com/portal/esec/login.ht*
  • http*treasury.pncbank.com/portal/service/js/loginproc.js*
  • http*www.northerntrust.com/*
  • http*www.northerntrust.com/incs/scripts.js
  • http*www3683.ntrs.com*
  • http://*
  • http://*myspace.com*
  • http://*odnoklassniki.ru/*
  • http://gohjie.ru/script.js
  • http://vkontakte.ru/*
  • http://www.hsbccreditcard.com/ecare/images/logo_en_US_HS.gif
  • http://www.macys.com/img/nav/co_macysLogo2.gif
  • http://www.midwestrustic.com/Products/images/Web%20Links/American%20Express.jpg
  • http://www.stlrcga.org/images/CommerceBank_logo.gif
  • http://www.wachovia.com/files/pres/images/logo.gif
  • http://www.wellsfargo.com/img/global/btn_blueslice.gif
  • http://www.wellsfargo.com/img/header/logo_62sq.gif
  • https*/pub/html/login.html*
  • https://*.web-access.com*welcome.cgi*
  • https://*/cmserver*verify.cfm*
  • https://*/onlineserv/CM/*
  • https://*/onlineserv/CM/std/js/en/disofactor.js*
  • https://*Cashman*
  • https://*blilk.com/Core/Authentication/MFA*.aspx*
  • https://*blilk.com/include/Utils.js*
  • https://*cashman*
  • https://*cmserver/include/ui/uiScripts.js*
  • https://*login_ui_includes/login_brandScripts.js*
  • https://a248.e.akamai.net/6/248/3583/000/wellsoffice.wellsfargo.com/ceoportal/framework/skins/default/js/wria/wria-core-min.js*
  • https://access.jpmorgan.com/appmanager/jpmalogonportal/jpmalogonhome*
  • https://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js
  • https://ajax.googleapis.com/ajax/libs/jqueryui/1.7.1/jquery-ui.min.js
  • https://ajax.googleapis.com/ajax/libs/jqueryui/1.7.1/themes/smoothness/ui.all.css
  • https://ajax.googleapis.com/ajax/libs/jqueryui/1.7.1/themes/start/ui.all.css
  • https://authmaster.nationalcity.com/tmgmt/js/bharosa_uio.js*
  • https://authmaster.nationalcity.com/tmgmt/wslogin.jsp*
  • https://banking.commercebank.com/CBI/Accounts/CBI/Summary.aspx
  • https://businessaccess.citibank.citigroup.com/cbusol/do/htmlserver/js/env.js*
  • https://businessaccess.citibank.citigroup.com/cbusol/signon.do*
  • https://businessonline.huntington.com/BOLHome/BusinessOnlineLogin.aspx*
  • https://businessonline.huntington.com/common/scripts/common.js*
  • https://businessonline.tdbank.com/CorporateBankingWeb/VAM/2_0_2/VAM.js*
  • https://businessonline.tdbank.com/corporatebankingweb/core/login.aspx*
  • https://cashmgt.firsttennessee.biz/cb/servlet/cb/login.jsp*
  • https://cbs.firstcitizens.com/cb/jsp-ns/inc/auth/fp.js*
  • https://cbs.firstcitizens.com/cb/servlet/cb/loginfcbnc.jsp*
  • https://chaseonline.chase.com/MyAccounts.aspx
  • https://chsec.wellsfargo.com/login/login.fcc*
  • https://cm.netteller.com/login2008/Authentication/Views/Login.aspx*
  • https://cm.netteller.com/login2008/Scripts/NetTellerCorners.js*
  • https://commercial.wachovia.com/Online/Financial/Business/Service?action=Login*
  • https://commercial.wachovia.com/Online/Registration/jsinclude/bidata.js
  • https://direct.bankofamerica.com/BofaDirect/javascript/js.util.uiutils.js*
  • https://direct.bankofamerica.com/Core/servlet/BofaDirect.BankofAmericaDirect.BankofAmericaDirectServlet?page=PgLogin*
  • https://ecash.*
  • https://internetbanking.firsttennessee.biz/webcm/customer1.asp*
  • https://olb.gnty.com/Login/Username.aspx*
  • https://online.citibank.com/US/*/portal/Home.do
  • https://online.citibank.com/US/JPS/portal/Home.do
  • https://online.wellsfargo.com/das/cgi-bin/session.cgi*
  • https://onlinebanking#.wachovia.com/myAccounts.aspx*
  • https://onlineeast#.bankofamerica.com/cgi-bin/ias/*/CustomerServiceMenuEntryPoint?custAction=75
  • https://onlineeast#.bankofamerica.com/cgi-bin/ias/*/GotoWelcome
  • https://premierview.membersunited.org/Core/login.aspx*
  • https://premierview.membersunited.org/WebResource.axd*
  • https://securentrycorp.*/Authentication/lib.js*
  • https://securentrycorp.*/Authentication/zbf/k/*
  • https://singlepoint.usbank.com/cs70_banking/logon/sbuser*
  • https://singlepoint.usbank.com/cs70_banking/user/script/login.js*
  • https://sitekey.bankofamerica.com/sas/maint.do
  • https://sitekey.bankofamerica.com/sas/sas-docs/js/commonscript.js
  • https://treas-mgt.frostbank.com/rdp/cgi-bin/welcome.cgi*
  • https://wellsoffice.wellsfargo.com/ceoportal/signon/index.jsp
  • https://wellsoffice.wellsfargo.com/ceoportal/signon/index.jsp*
  • https://www#.usbank.com/internetBanking/RequestRouter
  • https://www.accountonline.com//cards/svc/img/logo/citi.gif
  • https://www.accountonline.com/cards/svc/img/bg/bg_reg_nav.gif) 50% 50% repeat-x;}
  • https://www.americanexpress.com/home/images/hpbkgrd_login.jpg) repeat-x;}
  • https://www.bankofamerica.com//www/global/mvc_objects/images/mhd_reg_logo.gif
  • https://www.cajalaboral.com/FirmaElectronica/img/00_off.gif
  • https://www.cajalaboral.com/FirmaElectronica/img/01_off.gif
  • https://www.cajalaboral.com/FirmaElectronica/img/02_off.gif
  • https://www.cajalaboral.com/FirmaElectronica/img/03_off.gif
  • https://www.cajalaboral.com/FirmaElectronica/img/04_off.gif
  • https://www.cajalaboral.com/FirmaElectronica/img/05_off.gif
  • https://www.cajalaboral.com/FirmaElectronica/img/06_off.gif
  • https://www.cajalaboral.com/FirmaElectronica/img/07_off.gif
  • https://www.cajalaboral.com/FirmaElectronica/img/08_off.gif
  • https://www.cajalaboral.com/FirmaElectronica/img/09_off.gif
  • https://www.chase.com/online/Home/images/chaseNewlogo.gif
  • https://www.commercebank.com/images/buttons/loginButton.jpg) 50% 50% repeat-x; font-weight: normal; color: #ffffff; outline: none; }
  • https://www.commercebank.com/images/common/bg-leftnav.jpg) left top repeat-x scroll;}
  • https://www.commercial.hsbc.com.hk/1/2/!ut/p/kcxml/*
  • https://www.commercial.hsbc.com.hk/1/themes/html/b2gjs/WT_top_section.js*
  • https://www.corporatebanking.firsttennessee.com/cb/servlet/cb/jsp-ns/login.jsp*
  • https://www.gruposantander.es/*
  • https://www.hsbc.co.uk/1/2/!ut*
  • https://www.hsbccreditcard.com/ecare/viewaccount*
  • https://www.ibsnetaccess.com/NASApp/NetAccess/*
  • https://www.macys.com/css/yui/build/fonts/fonts.css
  • https://www.macys.com/css/yui/build/reset/reset.css
  • https://www.macys.com/signin/index.ognc
  • https://www.microsoft.com/library/media/1033/windows/images/internet-explorer/default/ie8_logo.gif\
  • https://www.microsoft.com/library/media/1033/windows/images/internet-explorer/default/ie8_logo.gif\
  • https://www.nationalcity.com/consultnc/*
  • https://www.nationalcity.com/sharedApp/js/isEmpty.js*
  • https://www.paypal.com/##/cgi-bin/webscr*
  • https://www.paypal.com/##/cgi-bin/webscr?cmd=_flow&SESSION=*
  • https://www.paypal.com/##/cgi-bin/webscr?cmd=_login-done*
  • https://www.paypal.com/##/cgi-bin/webscr?cmd=_profile-credit-card-new-clickthru
  • https://www.suntrust.com/portal/server.pt?mode=*
  • https://www.us.hsbc.com/1/2/3/business/online/business-internet-banking/log-on*
  • https://www.us.hsbc.com/1/themes/html/hbus_common/HSBC-top_section.js*
  • https://www.usbank.com/en/images/global/logo-usbank-siteheader.png
  • https://www3683.ntrs.com/ptl/ptl/javascript/NavigationMenuScripts.js*
  • https://www8.comerica.com/*
  • https://www8.comerica.com/images/sdc.js

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:

  • American Express
  • Bank of America
  • Caja Laboral
  • Chase
  • Citibank
  • Fifth Third
  • HSBC
  • Microsoft
  • Myspace
  • National City
  • Net Banking
  • OSPM
  • Odnoklassniki
  • PNC
  • PayPal
  • Santander
  • Suntrust
  • US Bank
  • Union Bank of California
  • Vkontakte
  • Wachovia
  • Wells Fargo

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}ojaeghaopuegeudeeb.com/xman/gogo.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}jaeghaopuegeudeeb.com/xman/spm1.exe

It did not exhibit backdoor routines during testing.

Variant Information

This Trojan has the following MD5 hashes:

  • ceaa394d6233588d75f321c629c7a071

It has the following SHA1 hashes:

  • fd273d0b4ab87fe180d6432412b4bd67d1021894

  SOLUTION

Minimum Scan Engine:

8.900

Step 1

Scan your computer with your Trend Micro product and note files detected as TROJ_ZBOT.BAY

Step 2

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 3

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

[ Learn More ]

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
    • {4F7B03F1-D465-7A2F-E893-EA6755CBAD8A}=%Application Data%\{random1}\{random}.exe

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}
    • {default}

Step 6

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