TSPY_ZBOT.TEW

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

Arrival Details

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

• http://www.{BLOCKED}cker24.com.tw/biz2zs/ttss.exe

Installation

This spyware adds 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.)

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

• http://www.{BLOCKED}cker24.com.tw/bin/allis.js

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:

• !http://*odnoklassniki.ru/*
• !http://vkontakte.ru/*
• *.bankofamerica.com*
• *bankofamerica.com/*
• https://*.bankofamerica.com/cgi-bin/ias/*
• https://*capitalone.com/*
• https://chaseonline.chase.com/*ogon.aspx*
• https://chaseonline.chase.com/images/logon.gif
• https://chaseonline.chase.com/images/spacer.gif
• https://online.citibank.com/US/*
• https://online.wellsfargo.com/*
• 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://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/maint.do
• https://sitekey.bankofamerica.com/sas/sas-docs/js/commonscript.js
• https://sitekey.bankofamerica.com/sas/signon*
• https://web.da-us.citibank.com/*BS_Id=MemberHomepage*
• https://web.da-us.citibank.com/cgi-b.../autherror.do*
• https://web.da-us.citibank.com/cgi-b.../portal/l/l.do
• https://web.da-us.citibank.com/cgi-bin/citifi/portal/l/autherror.do*
• https://web.da-us.citibank.com/cgi-bin/citifi/portal/l/l.do
• https://www.chase.com/cpp
• https://www.wellsfargo.com/*

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

• Bank of America
• Capital One
• Chase
• Citibank
• Odnoklassniki
• Vkontakte
• Wells Fargo

Stolen Information

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

• http://www.{BLOCKED}cker24.com.tw/biz2zs/vrata.php

Variant Information

This spyware has the following MD5 hashes:

• 8a90eea70deb1b278efdceb236025149

It has the following SHA1 hashes:

• 3c5ded09f3f6185dc03c36b2906158df02286299