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- Tutorial Number 4
-
- Written by Etenal Bliss
- Email: Eternal_Bliss@hotmail.com
- Date written: 12th Jan 1999
-
- Program Details:
- Name: CrackMe v1.0
- Author: CarLitoZ
- Language: Visual Basic
-
- Tools Used:
- NuMega SmartCheck 6.01
-
- Cracking Method:
- Analyzing Data in SmartCheck
-
- Viewing Method:
- Use Notepad with Word Wrap switched on
- Screen Area set to 800 X 600 pixels (Optional)
-
- __________________________________________________________________________
-
-
- About this protection system
-
- No disabled function. To register, you need to enter Registration Code. On
- first run, a file "MTR.dat" is placed in your Windows directory and upon
- successful registration, data is written into it and the program will
- always be registered till you delete the file...
-
- __________________________________________________________________________
-
-
- The Essay
-
- As this is a tutorial for newbies, I'll go into details about how I go about
- cracking the program. I suggest that you read this tutorial first.
- When you have completed the tutorial, leave this tutorial open and follow
- the instructions while using SmartCheck. Re-do it once more after you have
- completed the step by step guide...
-
- __________________________________________________________________________
-
- Data Analysis in SmartCheck
-
-
- Run SmartCheck. Load the program using it by using "File", "Open"
- and choose Bpe_cme1.exe.
-
- If this is your first time using SmartCheck, do the following:-
- Under Program Settings:-
- Error Detection: "tick" all boxes except "Report errors immediately".
- Advanced: "tick" first 4 boxes.
- Make sure "Suppress system API and OLE calls" is not "ticked".
- Reporting: All boxes "ticked" except for "Report MouseMove events
- from OCX controls"
-
- **I have captured the images of the three boxes for better reference. They are
- available on http://crackmes.cjb.net
-
- Run Bpe_cme1.exe in SmartCheck by pressing F5. Type in any registration
- code you want. Then click "Register". You will get a "Wrong Code! Try Again!"
- message. Exit the program.
-
- Ok. You will see a few lines in the left window. Look for reg_Click.
-
- **This is the subroutine in VB that is called when you click on the
- "Register" button.
-
- Click on reg_Click. Under "View" in SmartCheck, choose
- "Show All Events" and "Show Arguments".
-
- **This is also capture in a file called setting4.jpg file on
- http://crackmes.cjb.net
-
- **Make sure you click on reg_Click first or you will be lost
- in a sea of codes!!!
-
- Click on the + sign next to reg_Click to expand the threads
- under it. You can go through every single thread if you want.
- I'm saving you time now by telling you what to look for... I did
- it by looking at every single line... 8(
-
- Interesting lines include:
- 1) __vbaVarAdd(VARIANT:String:"r",VARIANT:String:"k")returns DWORD:63F258
- 2) __vbaVarAdd(VARIANT:String:"rk",VARIANT:String:"h")returns DWORD:63F258
- 3) __vbaVarAdd(VARIANT:String:"rkh",VARIANT:String:"1")returns DWORD:63F258
- 4) __vbaVarAdd(VARIANT:String:"rkh1",VARIANT:String:"o")returns DWORD:63F258
- 5) __vbaVarAdd(VARIANT:String:"rrkh1o",VARIANT:String:"y")returns DWORD:63F258
- etc...
- On the 8th line from 1),
- you will see __vbaVarTstEq(VARIANT:Const String:"",VARIANT:String:"rkh1oyie")returns DWORD:0
-
- Three lines below this, you will see a SysFreeString(BSTR:00412F80)
- Left click on it and look at the right window. 8)
-
- **This is the second SysFreeString. By the way, if you are keen, left click
- on the first SysFreeString and look at the right window as well.
-
-
- Explanation:
- __vbaVarAdd is to tell the program to add a variant to a string... look at
- 1) to 5) you will see k added to r, h added to rk, 1 added to rkh etc...
-
- __vbaVarTstEq is to compare the two strings, the correct code and the one
- you entered.
-
- __________________________________________________________________________
-
-
- Additional Information
-
- When using SmartCheck, you will see a lot of unnecessary lines...
- Look out for the following:
- 1) __vbastrcomp
- 2) varR8FromStr
- 3) __vbaVarTstEq
-
- If you see these few lines:
- 1) __vbaVarMul
- 2) Asc
- 3) __vbaVarAdd
- etc...
- It usually means that the calculation routine is here...
-
- __________________________________________________________________________
-
-
- Final Notes
-
- This tutorial is dedicated to all the newbies like me. I've tried to
- explain everything in details.
-
- And because I'm a newbie myself, I may have explained certain things wrongly
- So, if that is the case, please forgive me.
-
-
- My thanks and gratitude goes to:-
-
- The Sandman
- All the writers of Cracks tutorials