Archive A Reconstructed © MegaSecurity Database

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Server
Dropped File:
c:\WINDOWS\system32\Explorer.exe    Size: 53,237 bytes 
c:\WINDOWS\system32\yupdater.exe    Size: 53,237 bytes 

Added to Registry:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run "Yahoo Auto Updater"
Data: C:\WINDOWS\system32\yupdater.exe 

HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunServices "Shell"
Data: C:\WINDOWS\system32\Explorer.exe 

HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunServices "Yahoo Auto Updater"
Data: C:\WINDOWS\system32\yupdater.exe 

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run "Yahoo Auto Updater"
Data: C:\WINDOWS\system32\yupdater.exe 

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce "Yahoo Auto Updater"
Data: C:\WINDOWS\system32\yupdater.exe 

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServicesOnce "Yahoo Auto Updater"
Data: C:\WINDOWS\system32\yupdater.exe 



Tested on Windows XP
November 23, 2008

Send Yahoo Passwords (6,7,8,9)
Send Dial-Up Passwords
Send IE User& Password
SEnd Hardware Info
Send IP
Send Computer Name
Send Win User Name
Send OS Name
Disable Y!Save Password
Disable Regedit
Disable Ms Config
Disable Task Manager
Disable Win FIREWALL
Disable AntiVirus Programs
Delete Message Archice
Hide Start Button
Hide Clock
Crazy Mouse
Destroy TaskBar
Disable Group Policy
Auto Startup
Melt After install
Fake error Message
On first run

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.