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App Challenges Hints (5-15)


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website security *Just the hints of app challenges.*



Application challenges explained(app 5-15):
Hi everybody, this tutorial is intended to help you in the application challenges without giving much spoilers.. Every app challenge will be described in short..
If you don't want the spoilers then don't read my article.. In fact, don't read challenge articles. First go through other article sections here in HBH..
The app challenges here are easy ones & if you are completely new to cracking the apps, I would suggest you to google for some ASM(assembly language) tutorial.. & there is one nice tutorial by Frost_T in HBH article section.. So if you want to learn things rather than earn the challenge points, first go & read articles about assembly language... Now if you are really stuck in the challenge, then start reading my this nifty little article with hints & minimal spoilers.

Note that the app challenges here are easy & they either require viewing thru notepad, or NOPing them or setting breakpoints & looking for stacks, registers,etc.
I leave the app 1 to app 4 for self-try.. & there are other articles covering these if you need them.

*Note*: *I shall be specific in the hints.*

The softwares you need for cracking: a) Ollydbg b) Flash Decompiler(for app 2 only & not included here) c) Reflector d) Hex editor like XVI32 e) Calculator (calc.exe in windows)

App 5: Load the app in ollydbg.. Search for the serial number that should be in place of those X values.. Write down the serial number.. Now using hex editor, change the serial.. Finally, find a way to enter.. *Hint* *ampersand*

App 6: Easy one.. In olly, search the text strings & u'll see short word which will give you the password for HBH..

App 7: Its really easy.. Again viewing the text strings in Olly will show you the password to enter in HBH..

App 8: Just NOP or modify a jump.. *Hint* *Its near the goodboy message* I didn't change the text or the timer when I did this.. but u may disable or lenghthen the timer but there's no need of changing the passwordbox..

App 9: U don't need to code keygen... Just as the crackme coder says, just see what it does to the inputs you give... You may read another article here for this one if you need..

App 10: Similar as app 9.. In olly, just see what happens to the input you give.. In the text strings, you will see what your input changes to & with what is it compared.. So try few things & you will be able to make the text comparison give you the password finally.

App 11: Download the program called reflector from download section.. Open the app in reflector.. Then start to search the thing you need... Its not hard to understand the code so somewhere you will find the code that gives you the password for HBH..

App 12: Easy one.. You will see a nice compare at the point where the jump takes place to the badboy message.. The password is there in hex form.. Now its the calculator that does the job.

App 13: If you hate that fucking beep just NOP it(I did).. Now just look at registers(FPU) & stack putting the right breakpoints.. You will get it in no time.. Post in forum if you need more help.

App 14: Easy one though rated as hard.. Put the breakpoint at the compare which is responsible for the jump.. The password in hex format will be dumped right there below the CPU main thread in the info part.

App 15: Another easy one.. The most hard part of it is downloading the file(I have dial-up).. First either change your computer dates or modify the hex so that it becomes valid for 9999 A.D. Now just view the executable modules(Alt+E) & view names(Ctrl+N).. Now just put the breakpoint on every reference of the obvious one there..*Hint* *string comparison*.. When u run pressing F9, the required registration is dumped in registers as well as in stack.. Now u are registered.. Just proceed to password recovery, choose HBH challenge password & crack it..

With this, the application challenges of HBH are finished.. This is my first article so there may be the need for improvements. So please give your comments/suggestions so that I can improve myself.

Peace...
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