The password for the next level is stored in the file data.txt, which contains base64 encoded data
grep, sort, uniq, strings, base64, tr, tar, gzip, bzip2, xxd
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 > whatis grep grep (1) - print lines that match patterns > whatis sort sort (1) - sort lines of text files > whatis uniq uniq (1) - report or omit repeated lines > whatis strings strings (1) - print the sequences of printable characters in files > whatis base64 base64 (1) - base64 encode/decode data and print to standard output > whatis tr tr (1) - translate or delete characters > whatis tar tar (1) - an archiving utility > whatis gzip gzip (1) - compress or expand files > whatis bzip2 bzip2 (1) - a block-sorting file compressor, v1.0.8 > whatis xxd xxd (1) - make a hexdump or do the reverse.
Note: All commands don’t have to be used to complete level
View the contents of the current working directory
1 2 bandit10@bandit:~$ ls data.txt
View the data that is present in the file
1 2 bandit10@bandit:~$ cat data.txt VGhlIHBhc3N3b3JkIGlzIElGdWt3S0dzRlc4TU9xM0lSRnFyeEUxaHhUTkViVVBSCg==
Looking at the content it looks like a string of random characters but from the question we know that the data is base64 encoded. We can decode this data using the
base64 command that is present on Unix systems. The
-d flag is used to decode the data
(For detailed information on base64 encoding refer to the attached article)
1 2 bandit10@bandit:~$ cat data.txt | base64 -d The password is IFukwKGsFW8MOq3IRFqrxE1hxTNEbUPR
We have found the password for the next level !!
Logout of the current session and use the password of user bandit11 to access the next level
1 2 3 4 > ssh firstname.lastname@example.org -p 2220 This is a OverTheWire game server. More information on http://www.overthewire.org/wargames email@example.com's password: IFukwKGsFW8MOq3IRFqrxE1hxTNEbUPR