

           мФФФФФм
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           лмммммл N B U I L D  -  E N C R Y P T I O N  1 . 0


                          Coded by Christoph Gabler
                             All right reserved



ФФФ[Introduction]ФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФ

This program, Inbuild Encryption, is a .COM file crypter which is based on
direct decryption, without jumping back to the original entrypoint.
This means generic unpackers will *NOT* be able to unpack files crypted with
Inbuild Encryption. They simply don't recognize another entrypoint - the
problem is that mostly, only programs written in pure ASM can be crypted
with Inbuild Encryption because Inbuild Encryption will use the first 15
bytes of your .COM file in order for the decryption. This means that the
real beginning of your .COM is at position 15. So, include 15 NOP's or
whatever of junk code into your ASM file, then compile it and crypt it
with Inbuild Encryption.
Of course you cannot simply move the code from your .COM file to position
15, with a hexeditor! All offsets will be wrong than and the file not run
anymore.

ФФФ[Source Code]ФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФ

The source code is also included into this package. Fool with it around,
build more encryption/decryption routines into it - but be sure that your
.COM file will be moved to the position of the lenght of the decryptor.
I hope the source is enough commented for the beginners.

ФФФ[Example of Usage]ФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФ

Here comes a example of how to use this program, let's say you have coded
the file 'MYPROG.ASM' and it looks like the following :

Mov Ah,9
Mov Dx,offset Message
Int 21h
Int 20h
Message db 'This sux!','$'

Now, you want to crypt it with Inbuild Encryption, so, you have to add
the following to the source :

Db 15d dup (90h)    ; This line was added.

Mov Ah,9
Mov Dx,offset Message
Int 21h
Int 20h
Message db 'This sux!','$'

The line we added, tells the compiler to add 15 NOP's in decimal to the
beginning of your code. You can of course also place all the 15 NOP's
single by single. :)

ФФФ[Contact the author]ФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФ

Write to: ChristophG1@Hotmail.com   (This is the final adress)
Try to meet me at IRC on friday evenings in #Cracking or #UCF2000
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