Archive Helmet Icon Archive A Reconstructed © MegaSecurity Database

Ysor

Copyright © MegaSecurity

By Sarosoft


Informations
From Brazil
Author Sarosoft
Family Ysor
Category Remote Access
Version Ysor
Language Visual Basic, compressed with ASPack
Additional Information
dropped file:
c:\WINDOWS\system32\tmp.exe
size: 16.950 bytes 

port: 8886 TCP

startup:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run "Setup"
data: %SysDir%\tmp.exe 


tested on Windows XP
January 03, 2005

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.