Archive Helmet Icon Archive A Reconstructed © MegaSecurity Database

Jefesito

Released 22 years, 4 months ago. December 2003

Copyright © MegaSecurity

By Angelillo


Jefesito
Informations
Author Angelillo
Family Jefesito
Category Remote Access
Version Jefesito
Released Date Dec 2003, 22 years, 4 months ago.
Language Visual Basic, compressed with UPX
Additional Information
Client:
dropped files:
c:\WINDOWS\system\wrundll2.exe
size: 34,304 bytes 

c:\Documents and Settings\%user%\Local Settings\Temp\serv.exe
size: 34,304 bytes 

added to registry:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run "Windows Update"
data: C:\windows\system\wrundll2.exe 



Server:
dropped file:
c:\WINDOWS\system\wrundll2.exe
size: 32,256 bytes 

port: 12667, 3132, 8905, 1033 TCP

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.