TROJ_LUKICSEL.K

 Analysis by: Karl Dominguez

 PLATFORM:

Windows 2000, XP, Server 2003

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW


This Trojan may be dropped by other malware. It arrives as a component bundled with malware/grayware/spyware packages.

It adds registry entries to enable its automatic execution at every system startup.

  TECHNICAL DETAILS

File Size:

46,592 bytes

File Type:

DLL

Memory Resident:

Yes

Initial Samples Received Date:

05 Nov 2010

Arrival Details

This Trojan may be dropped by other malware.

It arrives as a component bundled with malware/grayware/spyware 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

  SOLUTION

Minimum Scan Engine:

8.900

VSAPI PATTERN File:

not yet pached

Step 1

For Windows ME and XP 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.K using either the Startup Disk or Recovery Console

[ Learn More ]

Step 3

Delete this registry key

[ Learn More ]

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

Step 4

Scan your computer with your Trend Micro product to delete files detected as TROJ_LUKICSEL.K 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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