Archive Helmet Icon Archive A Reconstructed © MegaSecurity Database

Thunk (a)

Copyright © MegaSecurity

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Author ?
Family Thunk
Category Remote Access
Version Thunk (a)
Language C
Additional Information
dropped files:
c:\WINDOWS\system32\wthunk32.dll  size: 15.360 bytes 
c:\WINDOWS\system32\wtsysl.dll    size: 0 bytes 

added to registry:
HKEY_USERS\S-1-5-21-789336058-1957994488-1060284298-1003_Classes\CLSID\{3F143C3A-1457-6CCA-03A7-7AA23B61E40F}\InProcServer32
HKEY_CURRENT_USER\Software\Classes\CLSID\{3F143C3A-1457-6CCA-03A7-7AA23B61E40F}\InProcServer32
HKEY_CLASSES_ROOT\CLSID\{3F143C3A-1457-6CCA-03A7-7AA23B61E40F}\InProcServer32

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\SharedTaskScheduler "{3F143C3A-1457-6CCA-03A7-7AA23B61E40F}"
data: OLE Automation Module 


tested on Windows XP
december 22, 2004

This archive is an almost-complete reconstruction of the legendary Mega Security (also known as Kobayashi), a premier 90s-era "Trojan Database" where malware authors once showcased their work. After a decade offline, the site was brought back in August 2024 by its original creator, MasterRat, who authorized the Malware Gallery to host this modernized, searchable version of the collection. While the original site remains available for those seeking a nostalgic, old-school experience, we are proud to continue its legacy here. Full credit and thanks go to MasterRat and the retired Mega Security staff for their years of dedicated work in cataloging these historical samples.