Archive A Reconstructed © MegaSecurity Database

System33r Downloader 0.5

Released 22 years, 7 months ago. September 2003

By System33r

Informations

Author	System33r
Family	System33r Downloader
Category	Webdownloader
Version	System33r Downloader 0.5
Released Date	Sep 2003, 22 years, 7 months ago.
Language	Visual Basic

Additional Information

Server:
size: 16.384 bytes

startup:
none

Author Information / Description

* Main Features *

- Melt Server
- Extreme FW/AV Kill (Over 750 AV/FW in the list!)
- Encryption
- Small 32kb unpacked, with all options enabled (FW/AV kill, Melt, URLs etc)
- Ability to pack with either fsg or upx!
- Server has good Error Handling
- Easy to-use GUI
- If UPX packing is specified it also scrambles the Server =)
- If it cannot kill a process it operates silently without errors
- Runs in the background (Hidden from taskmgr etc etc)
- Ability to define wether downloads should be executed hiddenly, visible or don't execute at all   just download them...
- Undetected from ALL anti-virus software! Yup...
- No limitations on how many downloads that can be downloaded

* v0.6 changes: *
- Undetected from All known (Serious) AV Products.
- Encryption has been changed for the better
- "Client" has a better look, thanks for suggestions, especially Biff.
- Compability problems with win9x... =( If you really need it on win9x tell me and i'll re-code it.
- Added simple Save list/ Load list/ Clear list
- AV-Stub and the Normal Stub has been re-vised and all Strings etc has changed. The Non-AV Stub now loads through Sub Main(), and has no Form. AV-Stub also loads via Sub Main() but still needs the form...
- The Process of the Server should be Un-killable, atleast with regular Taskmanager.
- Uses fsg v1.33 and upx v190w (They both work well.) for packing
- None-AV Stub became a bit larger due to new features, I've had it down to ~3,80kb =( but now it is bigger.
- Added weak support for Skins. Not utilized to 100% yet though.
- Added Option to Add Bytes to the Server.
- Added Option to display Authentic Fake Error.
- Added Option to Temporarly Crash Explorer (Windows Shell)
- No new unusual features yet =( but i might also add binder functions in next release


* v0.5 changes: *
- Undetected from All known (Serious) AV Products. Client is detected though, but who cares?
- Added 7 new programs to the av/fw list
- Encryption has been slightly changed
- General "Clean-up"...Somewhat Cleaner.

System33r

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.