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Hi, within this lecture, we're going to go into the level 24 and so much more if we have time.

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So far we are in the level 23 and again, I believe this is about crohn jobs.

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One more time.

4
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As you can see, it asks us to go into the crown.

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As you can see, there is nothing over here.

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So I'm going to go into that secondees and see what this is about.

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So I'm going to run the Lesli and here we go.

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Now, we have covered the Bendit 22 23, and now we want to take a look at the current job and the 24.

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So I'm going to cut this out.

10
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I'm going to say Cat Crohn job and the twenty four.

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And here you go.

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We have again Abeche script over there.

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So we want to see what's inside of this one.

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So I'm going to copy this.

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OK, user bin Cronje, the training for that S.H. and I'm going to get this out to see what it contains.

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And here we go again.

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This is a bad script.

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We see the Shabangu, we see some kind of variables and all other commands.

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Now, this level requires us to create our own first shell script.

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And this is a very big step and we should be proud, apparently, of ourselves when we beat this level.

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So keep in mind that your script is a real once executed, so you may want to keep a copy around.

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So this is good.

23
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So we're going to write apparently our first script.

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So you don't have to know anything about your script.

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Think I believe in order to complete this because scripting is kind of running commands in the terminal

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in a way, but it's much more complex if we actually want to do more complex things.

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But we're going to keep it simple anyway.

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So let's try to get take a look at this and try to understand what it's doing over there.

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So, again, we have a my name, which is the Who Am I, which has been the training for at this point.

30
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Right.

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If we run, who am I?

32
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It will give us the bend.

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Twenty three, but it will be run by the bandit.

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Twenty four.

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So my name will be Bandit twenty four in this case.

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Then we're going to go into VR Spool and Bandit twenty four.

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OK, and we can try to squeeze into that and try to run all of those things.

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So let me go into Raspal and bend it.

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Twenty four not c.v but KD.

40
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Let me come over here and let me try to run SLA.

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Here you go.

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We cannot see what's inside of this because it's, I believe it can be read by the Bendit 24 VR, the

43
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twenty three at this point.

44
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So far so good.

45
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It's actually it's not good because we cannot see what's inside of that folder.

46
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So we're going to have to think about it a little bit.

47
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Now we're going to say echo executing and deleting old scripts, inverse spool, my name.

48
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So I believe we're going to execute some of these scripts and then we are going to delete it and we're

49
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going to see if that's really the case.

50
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So we have a for loop over here.

51
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So if you know Python, then you know what a for loop is.

52
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It's kind of a loop.

53
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It's actually literally a loop that goes on and on until a condition is met.

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OK, so in this case, for I instar means just for the old scripts or old files in that folder, ok,

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for I in Stardust's are so I will stand for every individual file on that folder.

56
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OK, so for every individual file on that folder, where are you going to do some things.

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So this is the thing that we're going to do.

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So again, I sense for the individual files in that folder.

59
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So over here it checks something.

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OK, so this is the if block.

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If the condition is met, then it's going to execute the following comments.

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And in this case, I believe it's checking to see if it's a file.

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And then it says that the owner of that file, if the owner of that file has been to twenty three,

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then it's going to do something, OK, so it's going to give us a timeout, I believe, for sixty seconds,

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and then it's going to exit.

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You that file, as you can see, this is for executing again, Dash, that I means that that means running

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and the dollar sign, I sense for the individual file in that folder.

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So what it's basically doing over here is that deleting that file.

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So it's going to find every file in that folder.

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OK, basically it's going to execute it and it's going to delete it.

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So what we know over here is that if we can know what's going to happen in that folder, what's going

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to be placed in that folder, it's going to be executed and then it's going to be deleted.

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So I believe it's asking us to write a comment or write the best script to put in that folder.

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If we can write that folder, obviously, if we can put something in that folder, it's going to be

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executed and then it's going to be deleted.

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I don't care if it's going to be deleted or not, but if I can execute something on that folder, it

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will be executed as if it's appended 24, OK, because it's the current job of Bendit 24.

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And I believe we can write something over there because it's checking to see if the owner is been 23,

79
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even though it's a bandit 24.

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So I'm going to copy this Shabangu.

81
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OK, I'm just going to start writing my own best script and show you what I mean, because it's going

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to take some time, I believe.

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OK, yeah.

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I cannot type anything right now.

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I believe I lost my connection.

86
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OK, I'm just going to close this down and just S.H. into that thing one more time.

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We already have the password over here.

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I just have to just take the password and connect it one more time.

89
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So if you come across in a situation like this, you're allowed to have the passwords.

90
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You can connect it one more time.

91
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So let me try one more time.

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Pastie password.

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I believe we couldn't get it in a proper way.

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Let me try one more time.

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I'm going to say copy selection.

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I'm going to come over here and say page selection.

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And here you go.

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We are inside of Bendit.

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Twenty three.

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So I'm going to code into that second the one more time.

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OK, so we have the kronur Bendit twenty four.

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So if we get this banded twenty four we will see the S.H. file.

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I'm going to catch this one more time in order to see what's going on over there.

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So far so good.

105
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So I'm going to actually try to write my own my script right now.

106
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So after writing my own bad script, I'm, I'm just going to try and put it into the target folder.

107
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OK, so I believe we can not see the Bendat Pass at this point.

108
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So if we try to go into Bendit twenty three, it will be displayed to us.

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But if we go to bed at twenty four, it won't be displayed to us.

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But if we can actually run this comment with our best script, it will be executed and we can get the

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password back because it will be executed as Bendit 24.

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Right.

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All we have to do is just make sure we put it in the wire spool, then the 24 folder.

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So what we're going to do, we're going to create a bad script.

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So let me try to create a best script in the TMP folder because we have write permissions over there.

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If I run, unless there is nothing over here, I'm just going to make a folder called Dutil.

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OK, you can create a folder you want under temp directory.

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And over here I'm just going to try and write some file, write something like kronur or best script

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file.

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I'm going to use Nano if we have an over here.

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So let's try and use Nano.

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I'm just going to say test that as H OK, Nano test out S.H. so you can just name it anything you want

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and it gives us this error, permission denied and it takes us to something like this.

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So what is that.

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I'm going to exit out of that by Hidden Control X.

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Let me try some other name over here.

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My script out as H so here you go.

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I believe Testator Assange was taken for some reason.

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OK, let me try to save.

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Control or enter and control, lax control or enter and control X, but we cannot override that, we

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cannot save it for some reason I'm going to name it my daughter's age.

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I'm going to say yes, but yeah, here you go.

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We cannot do anything with Nano for some reason.

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So let me try to create another file.

135
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Maybe there is something wrong with Nano.

136
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I don't know.

137
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Maybe we can use something like Vem.

138
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But if you haven't worked with women before, it might be hard for you to keep up.

139
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Maybe we can do something else like just echoing.

140
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Just echo something into some file.

141
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Right.

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Let me go into Tempy folder.

143
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Let me go into let me create another folder like I tell one, two, three or something like that, OK?

144
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And maybe there is something wrong with that specific folder.

145
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I don't know.

146
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I'm just trying.

147
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Let me go into two, one, two, three and let me try to run a less.

148
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Yet there's nothing wrong over here.

149
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I'm just going to go for NENO one more time and try if this works or not.

150
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Nonno, my script that S.H..

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OK, no.

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Again it says that only unable to create directory if I hit enter it will open, but it won't save anything.

153
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So I believe there is something wrong with Nano itself.

154
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So what should we do.

155
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We should go for something else then nano again.

156
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We can go for them or we can go for anything else.

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Like just echo the comments into a file.

158
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First of all, we need to know what we are going to be executing in that best script.

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Right?

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So we're going to execute catting out the result of Bendit past Bendit twenty four.

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So let me try to echo test in the my script at S.H. H.

162
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Yeah, I believe this works.

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Let me see, let me run Katmai script that S.H. and here you go.

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It works so we can echo something.

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At least we know that.

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Let's try to echo something into an actual script.

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OK, into the my script as I h anyhow so I'm going to write test to, into my script that as h and see

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if that has been overridden.

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So yep.

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Here you go.

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It works.

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Now if I echo some comment into that file and then if I can copy that comment into the wire spool bend

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24, it will be executed automatically by the chrome jump.

174
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Right.

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That is the logic.

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That is what we are doing.

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That is why we are doing this.

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So I'm going to run code and maybe do the shebang over here, like being Bash.

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And we don't actually need that.

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Ewbank we don't actually need that line.

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Right, because it's just for like syntax purposes.

182
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Let me try to just do it like this and see if this works.

183
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My script that S.H. So that backwords such an OK is for giving a new line.

184
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And if I kept my script, no, it doesn't work.

185
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So what I'm going to do, I'm just going to skip the Bemba's thingy and I'm just going to echo what

186
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I want to echo over there.

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So what I want is to have the Shabangu like that, OK, without the end over here.

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So let me try this.

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No, it doesn't even echo the bank.

190
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So there is something wrong with the Shabangu itself.

191
00:14:05,100 --> 00:14:16,440
So we can just skip that line and just try like this cat at Banded Pass, OK, and pass Bendit 24 and

192
00:14:16,710 --> 00:14:22,710
later I'm going to save this output into somewhere that I can actually read.

193
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So I'm going to save it in two to one to three and test or something like Password-Protected or something

194
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like that.

195
00:14:32,070 --> 00:14:40,230
OK, so if we can actually see this, let me try to get my script out.

196
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S.H. Nope, it didn't actually run, but we haven't saved it into the my script that I say.

197
00:14:48,360 --> 00:14:57,050
So we have to just make sure that we save it into my script that h OK now if we try to get my script

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that age.

199
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Here you go.

200
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Finally we have.

201
00:14:59,360 --> 00:15:04,790
I have something in my script that S.H., which admittedly Shabangu, but I believe it won't cause any

202
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problems.

203
00:15:05,720 --> 00:15:12,920
So if we can make this run by Bendit 24, it will just read the password of the Bendit 24 and it will

204
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just save the output in the TMP folder under until one, two, three folder in the password that texte.

205
00:15:20,180 --> 00:15:26,960
So I'm going to change the permissions for that file to see Mode 777 in order to make this executable

206
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because we want it to be executed OK by anyone.

207
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We don't care at this point.

208
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It will be deleted anyway eventually.

209
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So the result will be saved in this folder actually in the password that the next day.

210
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But we don't have anything such as password that texte.

211
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So I'm going to create that, create that file.

212
00:15:48,200 --> 00:15:52,970
I'm going to say Tajh password that you see, it will be over here right now.

213
00:15:53,150 --> 00:15:56,570
If you catch this, you won't see anything because it's nothing there.

214
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But after it got executed, it will be there.

215
00:16:00,740 --> 00:16:07,700
But in order for this to work, I believe we have to make sure that password that can be overwritten

216
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by anyone.

217
00:16:08,480 --> 00:16:12,710
So I'm going to change the permission to seven seven seven to password data.

218
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Sixty to just to make sure.

219
00:16:14,810 --> 00:16:22,610
OK, so I'm going to copy my script that S.H. to the target folder, which is if you remember it, it's

220
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VAR Spool Bendit 24 like that.

221
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So far so good.

222
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So here you go.

223
00:16:30,710 --> 00:16:35,110
Now what we should do, we should wait for a minute.

224
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Remember that cron job.

225
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I believe it was getting executed that every six seconds.

226
00:16:42,560 --> 00:16:44,540
I'm not very certain about that.

227
00:16:44,540 --> 00:16:47,810
Maybe we can take a look at chrome tabs or something like that.

228
00:16:48,140 --> 00:16:55,580
But again, we can just wait for a minute and see if we get the result in the TMP folder.

229
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Anyway, after it's executed, it's going to write this into the password data.

230
00:17:01,850 --> 00:17:07,270
So I'm just going to get a password that the ANC forget the result right now.

231
00:17:07,940 --> 00:17:08,600
Here you go.

232
00:17:08,600 --> 00:17:09,790
We already have it.

233
00:17:09,800 --> 00:17:11,540
So it got executed.

234
00:17:11,960 --> 00:17:13,660
So far, so good.

235
00:17:13,880 --> 00:17:18,830
So I believe this is the password for the level twenty four.

236
00:17:18,830 --> 00:17:22,610
So I'm going to come over here and know the password.

237
00:17:23,090 --> 00:17:28,310
I'm going to just paces over there and this will be level twenty four.

238
00:17:28,820 --> 00:17:30,500
So great.

239
00:17:30,800 --> 00:17:33,020
I hope you get this.

240
00:17:33,020 --> 00:17:37,580
So it was very interesting and it was actually very fun for me.

241
00:17:37,970 --> 00:17:43,970
So I'm going to come over here and say Bendit twenty four and try that password and see if that was

242
00:17:43,970 --> 00:17:45,080
the right one.

243
00:17:45,950 --> 00:17:47,150
So here you go.

244
00:17:47,150 --> 00:17:54,860
Paste selection and hit enter and we are inside of Bendit when for grades.

245
00:17:54,860 --> 00:18:00,740
So it has been a long journey for us, going from twenty three to twenty four.

246
00:18:00,890 --> 00:18:04,520
So we're going to stop here and continue within the next one.