1
00:00:00,830 --> 00:00:10,770
In this lesson we are going to learn how to correct this hero key and these are the steps of Step 1.

2
00:00:10,910 --> 00:00:18,550
Search for the strings for back message then put a breakpoint on the back message and that message is

3
00:00:18,580 --> 00:00:24,400
a message which tells you that you have entered a wrong zero key.

4
00:00:24,400 --> 00:00:29,900
After you have put a breakpoint the program will pass.

5
00:00:29,950 --> 00:00:37,060
At the break point for the better message you then search for where this hero key isn't being compared

6
00:00:37,660 --> 00:00:47,810
with the one which the user entered then you put a new breakpoint on the comparison and thereafter you

7
00:00:47,840 --> 00:00:49,960
extract this hero key.

8
00:00:50,180 --> 00:00:51,470
So let's get started.

9
00:00:53,360 --> 00:01:02,440
Open your correct me file using the SCC for DB e.g. and now you at the studying.

10
00:01:02,880 --> 00:01:10,660
Let's run to the entry point by pressing f 9 or clicking on the Iran button.

11
00:01:11,960 --> 00:01:16,220
And you are now at the entry point next.

12
00:01:16,300 --> 00:01:33,810
Just click on f 9 again and you will see the window showing into any wrong 0 key uncheck and you will

13
00:01:33,810 --> 00:01:36,680
show you the year that message.

14
00:01:37,560 --> 00:01:51,020
So notice and that message consists of the caption in the string or the message so in order to possible

15
00:01:51,020 --> 00:01:57,470
grim we need to find the correct breakpoint to put at a moment.

16
00:01:57,470 --> 00:02:04,310
We are not able to analyze the code because the program did not pass for us to analyze.

17
00:02:04,310 --> 00:02:14,430
It is running all the time so one way to find the breakpoint to put is to look for the strings in the

18
00:02:14,430 --> 00:02:15,220
back message.

19
00:02:16,470 --> 00:02:29,910
So just make sure you are in the user mode module rightly and then search for current module string

20
00:02:29,910 --> 00:02:39,970
references and he will perform all the search and then a result here look for the string which is showing

21
00:02:39,970 --> 00:02:42,240
up in the back message.

22
00:02:42,250 --> 00:02:44,890
In this case wrong zero key.

23
00:02:44,980 --> 00:02:55,870
Try again so publicly on this to go to the instruction and you can see it is over here.

24
00:02:55,960 --> 00:03:01,360
Then the string is being used in a message box.

25
00:03:01,930 --> 00:03:11,180
And this is the message box showing us a better message and all of these are the preparation for the

26
00:03:11,180 --> 00:03:13,590
message box to be shown.

27
00:03:13,760 --> 00:03:21,130
And if we look further you will find us another message box which is showing us a good message.

28
00:03:21,140 --> 00:03:26,970
It says Congress rather than so it is this good message.

29
00:03:27,060 --> 00:03:38,520
Which one to be shown so if you think and analyze it carefully there should be some kind of a comparison

30
00:03:38,520 --> 00:03:48,040
being made somewhere on top within sites wish message box is to be shown and that comparison is a comparison

31
00:03:48,040 --> 00:03:58,480
between the low key that the user enters and the correct key so if he were to screw up further we should

32
00:03:58,480 --> 00:04:06,900
be able to look to look for something interesting and over here you will find something interesting

33
00:04:06,900 --> 00:04:07,140
here.

34
00:04:08,640 --> 00:04:09,000
OK.

35
00:04:09,010 --> 00:04:11,890
But before that let us put a break point.

36
00:04:12,350 --> 00:04:19,530
Probably over here just before the good message is being shown.

37
00:04:19,900 --> 00:04:27,580
As you can see this gem jumps over the good message and goes to show you the bad message.

38
00:04:27,580 --> 00:04:29,670
So this is a good place to put a break point.

39
00:04:30,670 --> 00:04:32,170
So let us restart the program

40
00:04:36,230 --> 00:04:38,860
and enter the wrong zero key.

41
00:04:39,020 --> 00:04:45,790
Click on Jack any pauses at the jump.

42
00:04:46,020 --> 00:04:47,460
And so the junk will be taken.

43
00:04:48,570 --> 00:04:54,480
If you were to read f it you will continue to jump and show you that message.

44
00:04:55,400 --> 00:04:57,390
Let's press f it just to check it out

45
00:05:01,170 --> 00:05:01,770
in jumps.

46
00:05:01,820 --> 00:05:03,250
What a good message.

47
00:05:03,440 --> 00:05:06,920
And now it is in the back message session.

48
00:05:07,230 --> 00:05:08,680
He continued to press F it

49
00:05:14,920 --> 00:05:18,500
and that message is being shown here.

50
00:05:18,520 --> 00:05:19,610
Wrong zero key.

51
00:05:19,660 --> 00:05:20,200
Try again.

52
00:05:21,380 --> 00:05:21,880
OK.

53
00:05:21,910 --> 00:05:31,540
So now let us analyze further high up to see if we can put a breakpoint foot up just before the decision

54
00:05:31,540 --> 00:05:36,260
is being made to jump or not to jump obviously over here.

55
00:05:36,270 --> 00:05:39,920
It is testing the value of x to see whether or not can.

56
00:05:39,990 --> 00:05:47,870
So if something is setting the value in the X or What is setting it has more than see so you keep screwing

57
00:05:47,870 --> 00:05:48,270
up.

58
00:05:48,320 --> 00:05:59,100
You will find something interesting over here get dialogue item tax so this get ILO data item tax is

59
00:05:59,110 --> 00:06:05,670
a Windows function to extract the tax that is being kicked in by the user.

60
00:06:06,400 --> 00:06:13,160
So this appears to be a good place to put a breakpoint and we can remove this one.

61
00:06:13,270 --> 00:06:18,840
Now we reran the program again.

62
00:06:19,400 --> 00:06:21,590
Now we're here.

63
00:06:21,660 --> 00:06:24,830
Key in the wrong zero key.

64
00:06:24,830 --> 00:06:25,560
Click on check.

65
00:06:26,510 --> 00:06:32,310
And we break just as we anticipated and they get Della item tax.

66
00:06:32,420 --> 00:06:35,660
So at this point here is a bar to a string.

67
00:06:35,660 --> 00:06:38,400
The key is to use enters.

68
00:06:38,570 --> 00:06:40,150
So let's press F it

69
00:06:44,680 --> 00:06:47,580
and if you can see something is happening here.

70
00:06:47,950 --> 00:06:56,420
It is moving a string into easy X and now it has a loader.

71
00:06:56,540 --> 00:07:02,640
The tax then the user entered into e x.

72
00:07:02,870 --> 00:07:11,020
So as you can see X has got the string that the user entered and easy access or something else.

73
00:07:11,180 --> 00:07:19,260
Let's move one press F it and now it is trying to compare it is trying to compare between ESEA and e

74
00:07:19,270 --> 00:07:22,910
s to see that idea the same.

75
00:07:22,910 --> 00:07:30,920
So this is where the decision is going to be made whether or not the user has entered the correct 0

76
00:07:30,950 --> 00:07:31,860
key.

77
00:07:31,940 --> 00:07:37,080
So as you can guess this must be the zero g.

78
00:07:37,130 --> 00:07:38,090
Correct zero G.

79
00:07:38,780 --> 00:07:51,980
So you can right click on this copy line basically into not that in describing the

80
00:07:56,830 --> 00:07:57,130
put it.

81
00:07:57,130 --> 00:07:58,370
Come here.

82
00:07:58,360 --> 00:08:01,110
Now let's rerun the program.

83
00:08:01,120 --> 00:08:04,320
We can remove the breakpoint if you want

84
00:08:08,360 --> 00:08:12,320
and now we show base this year.

85
00:08:12,710 --> 00:08:16,860
Check F nine to run

86
00:08:19,660 --> 00:08:21,080
easy.

87
00:08:21,190 --> 00:08:24,320
The Congress measures is being shown.

88
00:08:24,400 --> 00:08:29,130
So you have managed to create this Iraqi key for this program.

89
00:08:29,170 --> 00:08:30,040
Thank you for watching.