TSPY_BANKER.JNS
Windows 2000, XP, Server 2003
Threat Type: Spyware
Destructiveness: No
Encrypted: No
In the wild: Yes
OVERVIEW
This spyware arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
It 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.
TECHNICAL DETAILS
Arrival Details
This spyware arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
Installation
This spyware drops the following copies of itself into the affected system:
- %System%\{random filename}.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.)
Autostart Technique
This spyware adds the following registry entries to enable its automatic execution at every system startup:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
SusClientId = {random filename}.exe
Other System Modifications
This spyware adds the following registry keys:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\WindowsUpdate\
ServiceBeholder
It adds the following registry entries:
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Download
RunInvalidSignatures = 1
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Security Center
FirewallDisableNotify = 1
It modifies the following registry entries:
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Download
CheckExeSignatures = no
(Note: The default value data of the said registry entry is yes.)
Information Theft
This spyware monitors the Internet Explorer (IE) activities of the affected system, specifically the address bar or title bar. It recreates a legitimate website with a spoofed login page if a user visits banking sites with the following strings in the address bar or title bar:
- Bradesco Net Empresa
- HSBC Bank Brasil S.A. - Banco Multiplo - No Brasil e no Mundo, HSBC. - Microsoft Internet Explorer
- https://bradesconetempresa.com.br/scripts/office.dll/CERTIFIC/CERTIFICADO?INI
- https://internetbanking.caixa.gov.br/SIIBC/index.processa
- https://wwwss.bradesco.com.br/scripts/ib2k1.dll/TAC/VRFSENHAATUAL
- www.uol.com.br
It 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 from the following banks and/or other financial institutions:
- Bradesco
- Caixa
- HSBC
- UOL
Drop Points
This spyware sends the information it gathers to the following email addresses:
- enviaencome das1@bol.com.br
- enviaencomenda7@bol.com.br
- enviaencomendas7@bol.com.br
- grananomeubolso002@gmail.com
Variant Information
This spyware has the following MD5 hashes:
- 2bc7f120a7777c5b4a57d89cc3fc64cc
It has the following SHA1 hashes:
- c463d685265b52065d37d3f2ed46f4f5d68785eb
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 terminate files detected as TSPY_BANKER.JNS
- If the detected file is displayed in either Windows Task Manager or Process Explorer but you cannot delete it, restart your computer in safe mode. To do this, refer to this link for the complete steps.
- If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.
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\CurrentVersion\Run
- SusClientId={random filename}.exe
- SusClientId={random filename}.exe
- In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Download
- RunInvalidSignatures=1
- RunInvalidSignatures=1
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Security Center
- FirewallDisableNotify=1
- FirewallDisableNotify=1
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_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate
- ServiceBeholder
- ServiceBeholder
Step 5
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_CURRENT_USER\Software\Microsoft\Internet Explorer\Download
- From: CheckExeSignatures=no
To: yes
- From: CheckExeSignatures=no
Step 6
Scan your computer with your Trend Micro product to delete files detected as TSPY_BANKER.JNS. 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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