TSPY_ZBOT.CBA
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. 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.
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
139,776 bytes
EXE
Yes
03 Jul 2009
Infection Points
This spyware arrives as a file downloaded from the following URLs:
- http://{BLOCKED}ytennisron.mobi/caliluv/install.exe
Installation
This spyware drops copies of itself in the Windows system folder and appends garbage code to the dropped copy to avoid easy detection. The dropped copies uses the following file names:
- sdra64.exe
It then creates the following non-malicious file(s):
- %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 with attributes set to System and Hidden to prevent users from discovering and removing its components:
- %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_2108
- _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 entries to ensure it 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://{BLOCKED}aytennisron.mobi/caliluv/cfg.bin
Once users access any of the monitored sites, it starts logging keystrokes.
The downloaded file contains information where the malware can download an updated copy of itself, and where to send its stolen data.
It targets the following websites:
- *.microsoft.com/*
- http://*myspace.com*
- https://www.gruposantander.es/*
- http://*odnoklassniki.ru/*
- http://vkontakte.ru/*
- */login.osmp.ru/*
- */atl.osmp.ru/*
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:
- Microsoft
- Myspace
- OSPM
- Odnoklassniki
- Santander
- Vkontakte
Stolen Information
The stolen information is saved 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://{BLOCKED}ytennisron.mobi/caliluv/canapeace/takeit.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.
It did not exhibit backdoor routines during testing.
Variant Information
This spyware has the following MD5 hashes:
- c767e8d11685e428f0a9a4e4ea528ec0
It has the following SHA1 hashes:
- b7c5a871471975832d765e6a44aec5ae7c6e8b4d
SOLUTION
8.900
7.391.00
17 Aug 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
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: Userinit = %System%\userinit.exe,
- From: Userinit = %System%\userinit.exe, %System%\sdra64.exe,
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_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Network
- UID = {Computer name}_{Random numbers}
- UID = {Computer name}_{Random numbers}
- In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile
- EnableFirewall = 0
- EnableFirewall = 0
Step 4
Scan your computer with your Trend Micro product to delete files detected as TSPY_ZBOT.CBA. 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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