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TROJ_ZBOT.CCB

October 08, 2012
 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: No

  • 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:

143,872 bytes

File Type:

PE

Memory Resident:

Yes

Initial Samples Received Date:

08 Aug 2010

Payload:

Downloads files, Steals information

Installation

This Trojan drops the following files:

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

(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 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:\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 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
{3AD5097F-CF7F-65FA-D0CD-6E7903491FE9} = %Application Data%\{random1}\{random}.exe

Download Routine

This Trojan accesses the following websites to download files:

  • http://{BLOCKED}3.{BLOCKED}1.194.175/us2070/obamas.doc

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:

    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/*
    • !http://*myspace.com*
    • !http://*odnoklassniki.ru/*
    • !http://vkontakte.ru/*
    • *.citibank.com/US/JPS/portal/Index.do*
    • *.citibank.com/US/JRS/portal/accountSummary.do
    • *bankofamerica.com*
    • *bankofamerica.com/*
    • *bankofamerica.com/cgi-bin/ias/*GotoCustomerServiceMenu
    • *bankofamerica.com/cgi-bin/ias/A/*/CustomerServiceMenuControl?custAction=75
    • *online.wellsfargo.com/das/cgi-bin/session.cgi*
    • *online.wellsfargo.com/login*
    • *wellsfargo.com/
    • @*/atl.osmp.ru/*
    • @*/login.osmp.ru/*
    • http*chase.com/
    • http://ajax.googleapis.com/ajax/libs/jquery/1.4/jquery.min.js
    • https://*.bankofamerica.com/cgi-bin/ias/*
    • https://*.chase.com/MyAccounts.aspx*
    • https://*chase.com/*
    • https://a248.e.akamai.net/7/248/3608/1f8b6f7a060359/online.wellsfargo.com/das/common/images/ico_alertInput.gif
    • https://ajax.googleapis.com/ajax/libs/jquery/1.4/jquery.min.js
    • https://banking.chase.com/.*?
    • https://banking.chase.com/AccountActivity/AccountDetails.aspx?AI=*
    • https://businessonline.tdbank.com/CorporateBankingWeb/Core/CustomerService/CustomerService.aspx
    • https://businessonline.tdbank.com/CorporateBankingWeb/Core/CustomerService/ModifySecurityQuestions.aspx
    • https://businessonline.tdbank.com/CorporateBankingWeb/Core/InformationReporting/AccountPortfolio.aspx
    • https://chaseonline.chase.com/MyAccounts.aspx
    • https://chaseonline.chase.com/images//ChaseNew.gif
    • https://chaseonline.chase.com/images//logoff.gif
    • https://chaseonline.chase.com/images/bolprogress.gif
    • https://chaseonline.chase.com/secure/ServiceActivation/LOBServiceController.aspx?_context=wire
    • https://chaseonline.chase.com/secure/serviceactivation/confirmation/confirm.aspx
    • https://chaseonline.chase.com/secure/serviceactivation/confirmation/error.aspx
    • https://chaseonline.chase.com/secure/serviceactivation/legalagreements/legalagreement.aspx
    • https://chaseonline.chase.com/secure/serviceactivation/primaryaccount/primaryaccount.aspx
    • https://chaseonline.chase.com/secure/serviceactivation/secauth/otpdeliverymode.aspx
    • https://chaseonline.chase.com/secure/serviceactivation/secauth/otpdeliverymodeconfirmation.aspx
    • https://chaseonline.chase.com/secure/serviceactivation/secauth/secauthinformation.aspx
    • https://chaseonline.chase.com/secure/serviceactivation/secauth/validateotp.aspx
    • https://gbsrv.com/bofa/icq.php?id=
    • https://gbsrv.com/bofa/in.php
    • https://gbsrv.com/ch/icq.php?dr=
    • https://gbsrv.com/ch/in.php
    • https://online.citibank.com/JRS/cm/img/top_nav/logo.gif
    • https://online.citibank.com/US/*/portal/Home.do*
    • https://online.citibank.com/US/*/portal/menu.do*
    • https://online.wamu.com/Servicing/Servicing.aspx?*
    • https://online.wellsfargo.com/das/cgi-bin/session.cgi*
    • https://onlineeast*.bankofamerica.com/*WeasRedirectControl?bofaAction=70
    • https://onlineeast*.bankofamerica.com/cgi-bin/ias/A/*/InterbankTransfersServiceAgreementControl
    • https://onlineeast*.bankofamerica.com/cgi-bin/ias/A/*GotoWelcome
    • https://onlineeast1.bankofamerica.com/cmsContent/en_US/TransferFunds/Model/WhyDoWeAskForThisInfoPopUp.html
    • https://payments.chase.com/Wire/wireaddconfirm.aspx
    • https://payments.chase.com/Wire/wireaddform2.asp*
    • https://payments.chase.com/Wire/wireaddverify.aspx
    • https://payments.chase.com/Wire/wirerecipientaddconfirm.aspx
    • https://payments.chase.com/Wire/wirerecipientaddform2.aspx
    • https://payments.chase.com/Wire/wirerecipientaddroutingnumber.aspx
    • https://payments.chase.com/Wire/wirerecipientaddverify.aspx
    • https://sitekey.bankofamerica.com/sas-docs/images/clr.gif
    • https://sitekey.bankofamerica.com/sas/challengeQandA.do
    • https://sitekey.bankofamerica.com/sas/helpScreen.do?nextAction=invalidImgHelp
    • https://sitekey.bankofamerica.com/sas/maint.do
    • https://sitekey.bankofamerica.com/sas/otp
    • https://sitekey.bankofamerica.com/sas/signon*
    • https://stmts.chase.com/StmtList.aspx?*
    • https://transfers.bankofamerica.com/jsp/bofa/account_add_ft.jsp
    • https://transfers.bankofamerica.com/jsp/bofa/account_add_ft.jsp?topNavigation=2&subNavigation=22
    • https://transfers.bankofamerica.com/jsp/bofa/addAccountAjaxProcessor.jsp
    • https://transfers.bankofamerica.com/jsp/bofa/email_validate.js*
    • https://transfers.bankofamerica.com/jsp/bofa/funds_transfer_signup.js*
    • https://transfers.bankofamerica.com/jsp/bofa/logout_ft.jsp?RET_URL=5&startEvent=Yes&endEvent=Yes&CEpage=TF03.01E
    • https://transfers.bankofamerica.com/jsp/bofa/make_transfer.jsp
    • https://transfers.bankofamerica.com/jsp/bofa/make_transfer.jsp?topNavigation=2&subNavigation=23
    • https://transfers.bankofamerica.com/jsp/bofa/make_transfer_confirm.jsp
    • https://www.bankofamerica.com/www/global/mvc_objects/images/1pixel_clear.gif
    • https://www.bankofamerica.com/www/global/mvc_objects/images/1pixel_clear.gif
    • https://www.gruposantander.es/*
    • https://www.paypal.com/*/cgi-bin/webscr?cmd=_login-done&login_access=*
    • https://www.paypal.com/us/cgi-bin/webscr?cmd=_profile-ach
    • https://www.paypal.com/us/cgi-bin/webscr?cmd=_profile-credit-card-new-clickthru&flag_from_account_summary=1
    • https://www.paypal.com/us/cgi-bin/webscr?cmd=_show-limits&req_from=view_limits
    • https://www.wellsfargo.com/help/faqs/signon_faqs

    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:

    • Bank of America
    • Chase
    • Citibank
    • Microsoft
    • Myspace
    • OSPM
    • Odnoklassniki
    • PayPal
    • Raiffeisen
    • Santander
    • Vkontakte
    • Washington Mutual
    • Wells Fargo

    Stolen Information

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

    • http://{BLOCKED}3.{BLOCKED}5.174.58/twitter/aga.php

    Other Details

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

    • Arrives as a file downloaded from the following URL: http://{BLOCKED}3.{BLOCKED}1.194.175/us2070/usow.exe

    It did not exhibit backdoor routines during testing.

    Variant Information

    This Trojan has the following MD5 hashes:

    • 6856c93428c81cc6e1cccab7661cc626

    It has the following SHA1 hashes:

    • 826c02de7c06fd38fe2055572ec1422922aa575b

      SOLUTION

    Minimum Scan Engine:

    8.900

    VSAPI PATTERN File:

    07.370.07

    VSAPI PATTERN Date:

    08 Aug 2010

    VSAPI PATTERN Date:

    8/8/2010 12:00:00 AM

    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 delete files detected as TROJ_ZBOT.CCB using the Recovery Console

    [ Learn More ]

    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
      • {3AD5097F-CF7F-65FA-D0CD-6E7903491FE9}=%Application Data%\{random1}\{random}.exe

    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_CURRENT_USER\Software\Microsoft\
      • {random}

    Step 5

    Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_ZBOT.CCB. 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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