TSPY_ZBOT.OZT
PWS:Win32/Zbot.gen!Y
Windows 2000, XP, Server 2003
![](/vinfo/imgFiles/legend.jpg)
Threat Type: Spyware
Destructiveness: No
Encrypted: Yes
In the wild: Yes
OVERVIEW
This spyware attempts to access a Web site 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 a list of targeted bank-related Web sites from which it steals information.
It sends the gathered information via HTTP POST to a remote website.
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.
TECHNICAL DETAILS
152,064 bytes
EXE
Yes
14 Nov 2010
Infection Points
This spyware arrives as a file downloaded from the following URLs:
- http://{BLOCKED}ime.asia/6ucks/oztime2.exe
Installation
This spyware drops the following files:
- %User Profile%\Application Data\{random1}\{random file name 1}.exe
- %User Profile%\Application Data\{random2}\{random file name 2}
(Note: %User Profile% is the current user's profile folder, which is usually C:\Windows\Profiles\{user name} on Windows 98 and ME, C:\WINNT\Profiles\{user name} on Windows NT, and C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003.)
It creates the following folders:
- %User Profile%\Application Data\{random1}
- %User Profile%\Application Data\{random2}
(Note: %User Profile% is the current user's profile folder, which is usually C:\Windows\Profiles\{user name} on Windows 98 and ME, C:\WINNT\Profiles\{user name} on Windows NT, and C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003.)
It injects itself into the following processes as part of its memory residency routine:
- explorer.exe
- rdpclip.exe
- ctfmon.exe
- wscntfy.exe
- taskeng.exe
- taskhost.exe
- dwm.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} = "%User Profile%\Application Data\{random1}\{random file name 1}.exe"
Other System Modifications
This spyware adds the following registry entries as part of its installation routine:
HKEY_CURRENT_USER\Software\Microsoft\
{random key}
Information Theft
This spyware accesses the following site to download its configuration file:
- http://{BLOCKED}ime.asia/6ucks/oztime2.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:
- *.westpac.com.au/*
- *.com.au/DAIB/*
- *.adcu.com.au/mvp352/*
- *.netteller.com.au/*
- *.humebuild.com.au/*
- *.hbs.net.au/hbsv47/*
- */hbsv47/*
- */Citrix/*
- *citrix*
- *factor2.inetbank.net.au/*
- *.teacherscreditunion.com.au/*
- *.accu.com.au/*
- *.qpcu.org.au/myviewpoint/*
- */myviewpoint/*
- *.cuviewpoint.net/*
- */ntv47.asp?WCI=login*
- */ntv45.asp?WCI=login*
- */ntv451.asp?WCI=login*
- *cu.com.au/*
- *union.com.au/*
- http*commbank.com.au/*
- http*netbank.commbank.com.au/netbank/bankmain*
- https://online.mecu.com.au*Balance*
- https://online.mecu.com.au*funds*
- https://online.westpac.com.au*startpage*
- https://online.westpac.com.au*bpd_pygetdetails*
- https://ibs.bankwest.com.au*Balances*
- https://ibs.bankwest.com.au/*/DailyLimits*
- https://www.bendigobank.com.au/banking/BBLIBanking*
- https://www.bendigobank.com.au/*/ReduceLimitSetup*
- https://internetbanking.suncorpbank.com.au/*Accounts*
- https://internetbanking.suncorpbank.com.au/*DailyLimit*
- http*internetbanking.suncorpbank.com.au*
- https://online.westpac.com.au/esis/Login/SrvPage*
- http*secure.ampbanking.com/au/Logon*
- http*online.qccu.com.au/*
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.
It attempts to steal information from the following banks and/or other financial institutions:
- Westpac
- Australian Defence Credit Union
- Hume Building Society
- Heritage Building Society
- Teachers Credit Union
- Australian Central
- Commonwealth Bank Group
- MECU
- Bankwest
- Bendigo Bank
- Suncorp Bank
- AMP
- Queensland Country Credit Union
Stolen Information
This spyware sends the gathered information via HTTP POST to the following URL:
- http://{BLOCKED}ime.asia/6ucks/gat3.php
Other Details
This spyware did not exhibit backdoor routines during testing.
Variant Information
This spyware has the following MD5 hashes:
- f5364a90f760438287c626f05f00ae48
It has the following SHA1 hashes:
- 87011000030a19eaa6803285e8ffd782ac619cfe
SOLUTION
8.900
7.620.05
14 Nov 2010
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 TSPY_ZBOT.OZT using either the Startup Disk or Recovery Console
Step 3
Delete this registry value
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}=%User Profile%\Application Data\{random1}\{random file name 1}.exe
- {random CLSID}=%User Profile%\Application Data\{random1}\{random file name 1}.exe
Step 4
Delete this registry key
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 key}
- {random key}
Step 5
Search and delete these folders
%User Profile%\Application Data\{random2}
Step 6
Scan your computer with your Trend Micro product to delete files detected as TSPY_ZBOT.OZT. 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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