TSPY_ZBOT.WUY
Windows 2000, XP, Server 2003
![](/vinfo/imgFiles/legend.jpg)
Threat Type: Spyware
Destructiveness: No
Encrypted: No
In the wild: Yes
OVERVIEW
This spyware 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.
It attempts to get information from a list of banks or financial institutions.
It checks for the presence of the following processes which are related to Outpost Personal Firewall and ZoneLabs Firewall Client:
- outpost.exe
- zlclient.exe
It terminates if either of the said processes exist. This is to ensure that it runs uninterrupted. It also has rootkit capabilities, which enables it to hide its processes and files from the user.
TECHNICAL DETAILS
Arrival Details
This spyware may be downloaded from the following remote sites:
- http://trinnitti-soft.org/arhiv/september/sea/service.exe
Installation
This spyware drops the following copies of itself into the affected system:
- %System%\sdra64.exe
(Note: %System% is the Windows system folder, which is usually C:\Windows\System on Windows 98 and ME, C:\WINNT\System32 on Windows NT and 2000, or C:\Windows\System32 on Windows XP and Server 2003.)
It drops the following non-malicious files:
- %System%\lowsec\local.ds - copy of the encrypted downloaded file
- %System%\lowsec\user.ds - used to save the gathered information
(Note: %System% is the Windows system folder, which is usually C:\Windows\System on Windows 98 and ME, C:\WINNT\System32 on Windows NT and 2000, or C:\Windows\System32 on Windows XP and Server 2003.)
It creates the following folders:
- %System%\lowsec
(Note: %System% is the Windows system folder, which is usually C:\Windows\System on Windows 98 and ME, C:\WINNT\System32 on Windows NT and 2000, or C:\Windows\System32 on Windows XP and Server 2003.)
It adds the following mutexes to ensure that only one of its copies runs at any one time:
- _AVIRA_2109
It injects itself into the following processes as part of its memory residency routine:
- SVCHOST.EXE
- WINLOGON.EXE
Autostart Technique
This spyware modifies the following registry entry(ies) to enable its automatic execution at every system startup:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Winlogon
Userinit = "%System%\userinit.exe, %System%\sdra64.exe,"
(Note: The default value data of the said registry entry is "%System%\userinit.exe,".)
Other System Modifications
This spyware adds the following registry entries as part of its installation routine:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Network
UID = "{Computer name}_{Random numbers}"
It creates the following registry entry(ies) to bypass Windows Firewall:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile
EnableFirewall = 0
Information Theft
This spyware 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://trampp-good.org/arhiv/test/trampp/cfg1.bin
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* https://www.gruposantander.es/* !http://*odnoklassniki.ru/* !http://vkontakte.ru/* @*/login.osmp.ru/* @*/atl.osmp.ru/* !http://*facebook.com* *isbank.com.tr/Internet/* http://trampp-good.org/arhiv/test/scring/icq.php *isbank.com.tr/Internet/* *esube*.ziraatbank.com.tr/veribranchZB/login* http://trampp-good.org/arhiv/test/scring/ziraat/1.php *esube*.ziraatbank.com.tr/veribranchZB/login* *acikdeniz.denizbank.com* *esube.bankasya.com.tr/BenimAsyamWeb/Login.jsf *ziraatbank.com.tr/veribranchZB/inquiry/account_inquiry.jsp* *acikdeniz.denizbank.com/EBranchForms/Account/Detail/AccountsMain.aspx* *esube.ingbank.com.tr/turkce/giris* *esube.ingbank.com.tr/turkce/Hpl* *esube.ingbank.com.tr/turkce/finsoftbank/intbank.asp* *internetsube.akbank.com.tr* *internetsube.yapikredi.com.tr*
It attempts to steal information from the following banks and/or other financial institutions:
- Akbank Facebook IS Bank Microsoft Myspace OSPM Odnoklassniki Santander Vkontakte
Attacked Entities
This spyware attempts to get information from a list of banks or financial institutions.
Stolen Information
This spyware saves the stolen information in the following file:
- %System%\lowsec\user.ds
(Note: %System% is the Windows system folder, which is usually C:\Windows\System on Windows 98 and ME, C:\WINNT\System32 on Windows NT and 2000, or C:\Windows\System32 on Windows XP and Server 2003.)
It sends the gathered information via HTTP POST to the following URL:
- http://trinnitti-soft.org/arhiv/september/db1.php
Other Details
This spyware checks for the presence of the following processes which are related to Outpost Personal Firewall and ZoneLabs Firewall Client:
- outpost.exe
- zlclient.exe
It terminates if either of the said processes exist. This is to ensure that it runs uninterrupted. It also has rootkit capabilities, which enables it to hide its processes and files from the user.
Variant Information
This spyware has the following MD5 hashes:
- adf61fe3ed21c5507a5b9e5e94feb29c
It has the following SHA1 hashes:
- c694b8ad4ede61f6c332aced20f86685549eb89a
SOLUTION
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.WUY using the Recovery Console
Step 3
Restore this modified 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_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon
- From: Userinit = %System%\userinit.exe, %System%\sdra64.exe,
To: %System%\userinit.exe,
- From: Userinit = %System%\userinit.exe, %System%\sdra64.exe,
Step 4
Scan your computer with your Trend Micro product to delete files detected as TSPY_ZBOT.WUY. 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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