Archive Helmet Icon Archive A Reconstructed © MegaSecurity Database

The RAT

Family Author(s) From Date Has Image
The RAT 1.1 HandyCat Russia October 2004
The RAT 2.0 HandyCat Russia January 2005
The RAT 3.0XP HandyCat Russia July 2005
The RAT 3.1XP HandyCat Russia July 2005
The RAT 4.0XP HandyCat Russia November 2005
The RAT 5.0XP HandyCat Russia November 2005
The RAT 5.5XP HandyCat Russia November 2005
The RAT 5.8XP HandyCat Russia November 2005
The RAT 6.0XP HandyCat Russia January 2006
The RAT 6.1XP HandyCat Russia March 2006
The RAT 7.0XP HandyCat Russia April 2006
The RAT 8.1XP HandyCat Russia June 2008
The RAT 9.0XP HandyCat Russia June 2008

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.