SYNOPSIS

AntiGender.exe

DESCRIPTION

The Anti Gender Crash was a proactive defense utility released to protect Ragnarok Online players from a then-omnipresent exploit known as “The Crasher”.

The exploit relied on sending malformed character gender data to nearby clients, triggering a fatal error when the client attempted to load sprites that didn’t match the expected gender identifier.

This patch functioned by intercepting the client’s resource loader. It introduced a layer of validation that verified the integrity of the gender and sprite IDs before attempting to load the associated files from the game archives. If a mismatch was detected, the patch would substitute a default female sprite asset instead of allowing the client to crash.

The archive includes only the relevant ASM patch codes in C++ format.

While the original compiled binary and source code have been lost, the archive includes the following functional components:

• hackcodes.h — Hardcoded memory offsets and byte sequences for the client-side resource validation bypass.

KEY FEATURES

• Resource Validation — Hooks into the sprite loading routine to ensure that gender-specific values are valid before processing.

NOTES

My memory’s fuzzy after 24+ years, but I believe someone first spotted this exploit while building a bot and shared it quietly on a private forum.

By that point the bug had made the game borderline unplayable for a lot of players — certain bots carried the defect (probably without their users even knowing), and it was spreading chaos.

I released the first public defensive patch, and people were genuinely grateful for it.

That goodwill lasted… about three days. Then I dropped “The Crasher,” turning the exploit public and offensive for anyone to use. Since the bots were still mostly private at the time, the patch suddenly became even more essential.

Anti Gender Crash v1.1 By Arsenic

What's new in version 1.1
-------------------------
- Fixed a stupid bug for the memory space used, now shall work for everyone.

Steps to activate the hack:
1) Run your RO client.
2) While in game, press Alt+Tab on your keyboard to minimize the game window.
3) Run this program.
4) Click on "Apply".
5) Come back to the game and enjoy.
		
This program applies a patch into the Ragnarok Online process memory, therefore you need
to have it running before applying.
It is compatible with the English Beta client patch level 64 & 65.

What this patch does:
Prevents the gender crash from occuring. Invalid characters will show up as females on your
screen. Normal characters will show up unchanged.

In case you don't know yet, the gender crash is a powerful crash exploit that makes every other
player's client to crash when they get in sight of the invalid character. It occurs because of an
invalid pointer in an instruction, and there's no check to validate the gender value. That crash
is done by sending an invalid gender when login with your character.

So, until Gravity fixes this, use this program and have fun playing.

--------------------------------------

~ Arsenic  a.k.a  Artemis`Entreri

E-mails : DumbassSk8er@hotmail.com
          arsenic@rootshell.be
        
Web page : http://onesided.cjb.net 
           www.onesided.da.ru  (Mirror)

//Game
char *gameTitle = "Ragnarok";

DWORD CALLPATCHADDR = 0x4CA1A5;
BYTE callPatch[] = {0xe8,0xf6,0x7c,0x09,0x00,0x90};
BYTE oldCallPatch[] = {0x89,0x8E,0x3C,0x1F,0x00,0x00};
int callPatchLen = sizeof(callPatch);

DWORD HACKROUTADDR = 0x561ea0;
BYTE hackRout[] = {0x83,0xf9,0x02,0x72,0x02,0x33,0xc9,0x89,0x8E,0x3C,0x1F,0x00,0x00,0xc3};
int hackRoutLen = sizeof(hackRout);