TROJ_LUKICSEL.H
Windows 2000, Windows XP, Windows Server 2003
Threat Type: Trojan
Destructiveness: No
Encrypted: Yes
In the wild: Yes
OVERVIEW
This Trojan is dropped by other malware as a file with a certain file name.
It tries to open threads in svchost.exe that may be create by other component malware.
It tries to find the file %System%\crt.dll, which may be a component file.
This Trojan may be dropped by other malware. It arrives as a component bundled with malware/grayware packages.
TECHNICAL DETAILS
Arrival Details
This Trojan may be dropped by other malware.
It arrives as a component bundled with malware/grayware packages.
Installation
This Trojan is injected into the following processes running in memory:
- Winlogon.exe
Autostart Technique
This Trojan adds the following registry entries to enable its automatic execution at every system startup:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Winlogon\
Notify\kbupdate
DllName = "kbupdate.dll"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Winlogon\
Notify\kbupdate
Startup = "WinlogonStartupEvent"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Winlogon\
Notify\kbupdate
Logoff = "WinlogonLogoffEvent"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Winlogon\
Notify\kbupdate
Shutdown = "WinlogonLogoffEvent"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Winlogon\
Notify\kbupdate
Asynchronous = "1"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Winlogon\
Notify\kbupdate
Impersonate = "0"
NOTES:
This Trojan is dropped by other malware as %System%\kbupdate.dll.
The Trojan may only be dropped as %System%\kbupdate.dll.
It tries to open threads in svchost.exe that may be create by other component malware.
It tries to find the file %System%\crt.dll, which may be a component file.
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 TROJ_LUKICSEL.H using either the Startup Disk or Recovery Console
Step 3
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 NT\CurrentVersion\Winlogon\Notify
- kbupdate
- kbupdate
Step 4
Scan your computer with your Trend Micro product to delete files detected as TROJ_LUKICSEL.H. 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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