TSPY_ZBOT.BYX

July 08, 2016
 Modified by: Kathleen Notario
 PLATFORM:

Windows 2000, XP, Server 2003

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

  • Threat Type: Spyware

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

This spyware attempts to steal information, such as user names and passwords, used when logging into certain banking or finance-related websites.

  TECHNICAL DETAILS

File Size:

153,600 bytes

File Type:

PE

Memory Resident:

Yes

Initial Samples Received Date:

28 Nov 2010

Payload:

Drops files

Arrival Details

This spyware may be unknowingly downloaded by a user while visiting the following malicious websites:

  • http://{BLOCKED}nced-cfg1.com/monte-karlo/us.exe

Installation

This spyware adds the following folders:

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

(Note: %Application Data% is the Application Data folder, where it usually is C:\Documents and Settings\{user name}\Application Data on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Roaming on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)

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

  • dwm.exe
  • rdpclip.exe
  • ctfmon.exe
  • wscntfy.exe
  • taskeng.exe
  • taskhost.exe

Autostart Technique

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

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
{random CLSID} = %Application Data%\{random1}\{random}.exe

Other System Modifications

This spyware adds the following registry keys:

HKEY_CURRENT_USER\Software\Microsoft\
{random}

Dropping Routine

This spyware drops the following files:

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

(Note: %Application Data% is the Application Data folder, where it usually is C:\Documents and Settings\{user name}\Application Data on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Roaming on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)

Download Routine

This spyware connects to the following URL(s) to download its configuration file:

  • http://{BLOCKED}nced-cfg1.com/monte-karlo/usdase.db

Information Theft

This spyware 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:

  • *.citibank.com/US/JPS/portal/Index.do*
  • *.citibank.com/US/JRS/portal/accountSummary.do
  • *online.wellsfargo.com/das/cgi-bin/session.cgi*
  • *online.wellsfargo.com/login*
  • *wellsfargo.com/
  • *www.bankofamerica.com*
  • *www.bankofamerica.com/*
  • htt*://www.citi*com/*
  • http*chase.com/
  • http://www.facebook.com/index.ph*
  • https://*.bankofamerica.com/cgi-bin/ias/*
  • https://*.chase.com/MyAccounts.aspx*
  • https://*chase.com/*
  • 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://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/cgi-bin/ias/*/CustomerServiceMenuEntryPoint?custAction=75
  • https://onlineeast#.bankofamerica.com/cgi-bin/ias/*/GotoCustomerServiceMenu
  • https://onlineeast#.bankofamerica.com/cgi-bin/ias/*/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/maint.do
  • https://sitekey.bankofamerica.com/sas/sas-docs/js/commonscript.js
  • https://sitekey.bankofamerica.com/sas/signonSetup.do
  • https://stmts.chase.com/StmtList.aspx?*
  • https://www.ibsnetaccess.com/NASApp/NetAccess/LoginValidation
  • https://www.wellsfargo.com/help/faqs/signon_faqs

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

  • Bank of America
  • Chase
  • Citibank
  • Facebook
  • TD Bank
  • Washington Mutual
  • Wells Fargo

Stolen Information

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

  • http://{BLOCKED}5.{BLOCKED}6.197.24/~hosting/woops/ttf.php

Variant Information

This spyware has the following MD5 hashes:

  • b10a7e91be5044de88a49ba6ddeac8bc

It has the following SHA1 hashes:

  • 71beab584fc41aef0b6ef7bfd1b4e5a6d5c3a894

  SOLUTION

Minimum Scan Engine:

8.900

VSAPI PATTERN File:

7.656.05

VSAPI PATTERN Date:

28 Nov 2010

VSAPI PATTERN Date:

11/28/2010 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 TSPY_ZBOT.BYX 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
    • {random CLSID}=%Application Data%\{random1}\{random}.exe

Step 4

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

Step 5

Scan your computer with your Trend Micro product to delete files detected as TSPY_ZBOT.BYX. 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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