Archive A Reconstructed © MegaSecurity Database

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Infection:
By visiting a prepared webpage a HTA application is run on the client machine.
The Visual Basic script  (TrojanDownloader.VBS.Iwill.b) embedded in the HTA application will download a file named "S.EXE".

S.EXE (size 1.199 bytes)(Not detected by AVP on september 18, 2003)
will download and execute following server:
c:\WINDOWS\TEMP\MSCONFIG.EXE (OptixLite 5.0 server aka Backdoor.Delf.em)

size: 44.033 bytes 

port: 45454 TCP

startup:
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run "MSCONFIG" 
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunServices "MSCONFIG" 
HKEY_LOCAL_MACHINE\Software\Microsoft\Active Setup\Installed Components\{9EC0745F-CAD3-628A-48E9-02B9AFEC8E74} "StubPath" 
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\explorer\User Shell Folders "Common Startup" 
Data: C:\WINDOWS\Temp 

registry added:
HKEY_LOCAL_MACHINE\Software\EES 
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Hardware Profiles\Current\Software\Microsoft\windows\CurrentVersion\Internet Settings "EnableAutodial" 
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\explorer\User Shell Folders "Common Startup" 
Data: C:\WINDOWS\Temp 


files added:
c:\WINDOWS\TEMP\MSCONFIG.EXE
c:\WINUPDATE.EXE 
c:\WINDOWS\Temporary Internet Files\Content.IE5\41YBG9MZ\o[1].exe 

all (Backdoor.Delf.em) and size: 44.033 bytes

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.