TSPY_BANKER.WSE
Infostealer.Torpplar (Norton), Trojan-Banker.Win32.Banbra (Ikarus)
Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)
Threat Type: Spyware
Destructiveness: No
Encrypted: Yes
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 does not have any propagation routine.
It does not have any backdoor routine.
It modifies the Internet Explorer Zone Settings.
It does not have any downloading capability.
It logs a user's keystrokes to steal information.
However, as of this writing, the said sites are inaccessible. It deletes itself after execution.
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 and executes them:
- %System%\{malware file name}
(Note: %System% is the Windows system folder, which is usually C:\Windows\System32.)
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
sysplar = "%System%\{malware file name}"
Propagation
This spyware does not have any propagation routine.
Backdoor Routine
This spyware does not have any backdoor routine.
Web Browser Home Page and Search Page Modification
This spyware modifies the Internet Explorer Zone Settings.
Dropping Routine
This spyware drops the following files:
- %System Root%\$$Delme$$.bat - deleted right away
(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.)
Download Routine
This spyware does not have any downloading capability.
Information Theft
This spyware logs a user's keystrokes to steal information.
Stolen Information
This spyware sends the gathered information via HTTP POST to the following URL:
- http://{BLOCKED}w.229.{BLOCKED}c.com/ie/ie.asp
Other Details
However, as of this writing, the said sites are inaccessible.
It deletes itself after execution.
NOTES:
It uses an Internet Explorer icon to trick the users into clicking the them.
It deletes all text files found in %Cookies%.
It attempts to steal information related to certain online accounts.
It steals the following information:
- Password
- Username
- Telephone number
- Card ID
- Card type
- Expiration date (month and year)
- Security code
It does not have rootkit capabilities.
It does not exploit any vulnerability.
SOLUTION
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
Restart in Safe Mode
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
- sysplar = %System%\{malware file name}
Step 4
Reset Internet security settings
Step 5
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TSPY_BANKER.WSE. 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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