For early learners...

[kani]

I've done a cute little number for early learners!
The way I figured was that some tutorials are getting harder. So I figured this...
I'm not much of an authority on harder tutorials yet but..
I thought I could do some easy ones for young 'whipper snappers' that frequent the forum! What say you?
DesktopUSArmy Body Fat Percentage Calculator (keep you in shape)

[houdini]

GREAT for the young and very uneducated crackers of the future!

[kani]

Thank you, it means a hell of a lot that!

I've done a number of them which I'll seep in amongst the others from time to time.
All good stuff for grabbing a couple of beers and spending an hour tackling a project or two!

[houdini]

[MiStEr_X]

link updated, thanks kani

[Rashid88]

i'm a newbie here,in the cracking world...i think i understand your tutorial very much, mR Kani...but, i dont understand 1 thing..why we put "90" to replace "7E27" when in Hiew32? and in your tutorial,we insert 2 "90"...why is it?is this what they called Hex Editing?

sorry if i asked such silly question...but,i do have passion to learn all these cracking and keygenning procedure...huhuhu

thank you
=)

[crack-break]

was two 90 inserted one following the other.??.. i mean after one another??? if yes then its to match the bytes... u get it y... cos after puttin nop... that is 90 the other bytes those were left will go to next line and may become anodr opcode and thus corruptin files

eg,,

somthn lyk this..

C0 84
WHEN WE NOP i.e. if we put it will become sumthn lyk this

90 NOP

84 ( some intel opcode)

the above situation may corrupt the file...as 84 wasnt an opcode in the original programmm


but when we put 2 NOP, we get...

90

90


similarly if sumthn is lyk this....

ab cdef

we have to put three NOP so that it becomes....

nop (in place of ab)
nop (in place of cd)
nop (in place of ef)


hope u uderstand!!! have a nice day..

[kani]

Thanks for the interest
'Rashid88' and thanks for the explanation 'crack-break, much appreciated!'
My apologies for not returning your question myself.

One thing that may help you Rashid88 is:
A digit is one single figure!

Two digits = '1byte' ............. (xx = 1byte)
Two bytes = '1word' ............ (xx xx = 1word)
Two words = '1Dword' ......... (xxxx xxxx = 1Dword)

One '90' per byte to 'nop' (no operation)

Hence:
To nop: 'xx xx xx' (3 bytes)
90 90 90

(It's not important to you but the reason I didn't reply to you myself is my
dog (Maxwell) has not been well & I've been taking care of him so I've not been online)

[Rashid88]

ooooooooo
ok,i understand more now..
and...
another question,mR Kani...
is it a must to change "jle" to "nop"?
why?
if i'm not mistaken, i've seen another tutorial by another person,
it changes "jle" to "je"..

uiikks??
is this what Mister_X mention about Reversing Jumpers?
is it so, what is the reverse 4 "jb"?
i'm trying to crack a software...
hehehe=p

[crack-break]

rashid that is done so that if your serial is meeting the requirement for the jump... say in that case.... if jle procedure is takin u to the good boy msg then changing it to je will make your jump invalid even when it was fulfillin lower and equal requirement...

in this case, since i saw nopin is done, the immidiate code following it must be the procedure taking u to good msg... so nopin makes the jump to bad msg or watever bad will be ineffective...

[crack-break]

KANI thanks i have learnt from u all... ... but i think u din lyk my explaination

[kani]

[reno 456]

I have being trying to learn to crack for 2 days. (such a long long time )
I found your tutorail easy to understand and I managed to grasp a lot! This is my first ever crack and who knows maybe some day I'll be able to write tutorials too!

Thanks loads reno 456

[kani]

[skipdgs]

Great tutorial! Excellent in fact! Wish I had this kind of help in the beginning! While I'm maybe average at that sort of thing, I need a little more help... wonder if there's anything in the way of a tutorial for dongle hacks?