TSPY_ZBOT.BYE
Windows 2000, XP, Server 2003
Threat Type: Spyware
Destructiveness: No
Encrypted: Yes
In the wild: Yes
OVERVIEW
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
112,128 bytes
EXE
Yes
18 Oct 2010
Infection Points
This spyware arrives as a file downloaded from the following URLs:
- http://{BLOCKED}dblade.com:81/adm/fl/game.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 drops the following non-malicious files:
- %System%\lowsec\local.ds
- %System%\lowsec\user.ds
- %System%\lowsec\user.ds.lll
(Note: %System% is the Windows system folder, which is usually C:\Windows\System32.)
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\System32.)
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}
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile
EnableFirewall = 0
Information Theft
This spyware accesses the following site to download its configuration file:
- http://{BLOCKED}dblade.com:81/adm/fl/data.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:
- *.microsoft.com/* !
- http://*myspace.com*
- https://www.gruposantander.es/* !
- http://*odnoklassniki.ru/* !
- http://vkontakte.ru/*
- @*/login.osmp.ru/*
- @*/atl.osmp.ru/*
- @https://www.bendigobank.com.au/
- @https://online.westpac.com.au/esis/Login/SrvPage
- @https://online.westpac.com.au/pkmslogin.form
- @https://online.savingsloans.com.au/daib/banking_index.asp?Header_Num=204
- @https://online.savingsloans.com.au/daib/banking_index.asp?Header_Num=205
- @https://netteller.sydneycu.com.au/802084v45/ntv45.asp?WCI=entry
- @https://netbank.communityfirst.com.au/mvpcfcu/Login.asp
- @https://netteller2.victeach.com.au/704191V47/ntv471.asp?WCI=login
- @https://www.ingdirect.com.au/client/Login.aspx
- @https://netteller2.victeach.com.au/704191V47/ntv471.asp?WCI=login
- @https://netteller2.victeach.com.au/704191V47/ntv471.asp?WCI=login2
- @https://www1.membersequitybank.com.au/ME
- @https://www.cpsinternetbanking.com.au/Daib/ProcessLogon.asp
- @https://is2.cuviewpoint.net/*ogin.asp
- @https://ib2.inetbank.net.au
- @https://www.hsbc.com.au/1/2/?idv_cmd=idv.Authentication
- @https://online.swscu.com.au/externaltransfer.aspx
- https://banking.*.de/cgi/ueberweisung.cgi/*
- https://internetbanking.gad.de/banking/*
- https://www.citibank.de/*/jba/mp#/SubmitRecap.do
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:
- AIB
- Citibank
- GAD
- HSBC
- ING Direct
- Microsoft
- Myspace
- NetTeller
- Odnoklassniki
- OSPM
- Santander
- Vkontakte
- Westpac
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\System32.)
It sends the gathered information via HTTP POST to the following URL:
- http://{BLOCKED}dblade.com:81/adm/income.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:
- 7d52d9ff9d5ef5b83ead6dc0dd8d1252
It has the following SHA1 hashes:
- b0fe73752db7b70ce7175e2d7d99f31fe406b79f
SOLUTION
8.900
not yet patched
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.BYE using the Recovery Console
Step 3
Restore these modified registry values
Important:Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this only if you know how to or you can seek your system administrator's help. You may also check out this Microsoft article first before modifying your computer's registry.
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon
- Userinit = %System%\userinit.exe, %System%\sdra64.exe,
- Userinit = %System%\userinit.exe,
- Userinit = %System%\userinit.exe,
- Userinit = %System%\userinit.exe, %System%\sdra64.exe,
Step 4
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 5
Search and delete this folder
Step 6
Scan your computer with your Trend Micro product to delete files detected as TSPY_ZBOT.BYE. 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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