Reversing Tray Day 4.5
BEGINNERS: the kill of a weak and badly written scheme

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30 January 1998
by MaD '96 [CPT]
Courtesy of Reverser's page of reverse engineering
slightly edited
by reverser+
Advanced crackers begone: this is an easy, beginners oriented essay, yet, for beginners, particularly intersting IMHO, because it shows you how to 'follow' a protection scheme 'around the codecorners'. Besides we have presented (and will present) so many 'higher cracking' essays that it is appropriate to offer some interesting essays also to those that don't master yet the more difficult tyechniques of our art. Beginners will learn here how a simple mathematical verification routine works, and will be able to see 'in slow motion' the creation of a registration nummer. Enjoy!
There is a crack, a crack in everything That's how the light gets in
(x)Beginner ( )Intermediate ( )Advanced ( )Expert
YES Beginners

What can I say more, it's basic and straight forward .... No extra's or heavy coding

Reversing Trayday 4.5
BEGINNERS: the kill of a weak and badly written scheme
Written by MaD '96 [CPT]

This is a useful hack of the beginner .... Reading through the essay we find a poorly protection
scheme which also has a mistake (you can find this when you reverse a newer util tray-text) but
more about this in the ending notes of this essay ... I'm not a talker, just a reverser!
Tools required
The one and only SOFTICE 95 ver. 3.0 (or more)

Target's URL/FTP


Final Notes

This essay was written on 9 January 1998, for my own site, and most 
important, as a reference for later works... After using this util for a 
while I cracked Traytext (It's from the same guy) because trayday already 
saved me a lot of typing work and with traytext you can even paste complete 
texts form the systray to your applications...
Well I reversed this target, and of course the proctection is quite 
similar (subtract the values in stead of adding ) I found out that the 
fourth digit was ment to be a '-'... XXX-XXXX 
And that that he did not check it, was probably just a mistake of the 
Happy hunting... MaD '96 [CPT]

Ob Duh
I wont even bother explaining you that you should BUY this target program if you intend to use it for a longer period than the allowed one. Should you want to STEAL this software instead, you don't need to crack its protection scheme at all: you'll find it on most Warez sites, complete and already regged, farewell.
You are deep inside reverser's page of reverse engineering, choose your way out:

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