Bandit: Level 10 - Level 11
Level 10
Username: bandit10
Password: FGUW5ilLVJrxX9kMYMmlN4MgbpfMiqey
Task:
https://overthewire.org/wargames/bandit/bandit11.html
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The password for the next level is stored in the file data.txt, which contains base64 encoded data
Commands you may need to solve this level
grep, sort, uniq, strings, base64, tr, tar, gzip, bzip2, xxd
Start
Let’s begin by connecting to the server bandit.labs.overthewire.org and logging in with user bandit10 on port 2220.
We have several commands available for this task:
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man (1) - an interface to the system reference manuals
grep (1) - print lines that match patterns
sort (1) - sort lines of text files
uniq (1) - report or omit repeated lines
strings (1) - print the sequences of printable characters in files
base64 (1) - base64 encode/decode data and print to standard output
tr (1) - translate or delete characters
tar (1) - an archiving utility
gzip (1) - compress or expand files
bzip2 (1) - a block-sorting file compressor, v1.0.8
xxd (1) - make a hex dump or do the reverse.
Solve the level
Okay, we know that data.txt is encoded in base64 so we have to decode that document.
Lets check the manual page from base64
``` Base64 encode or decode FILE, or standard input, to standard output.
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With no FILE, or when FILE is -, read standard input.
Mandatory arguments to long options are mandatory for short options too.
-d, --decode
decode data ```
Okay so we have to use -d for decoding.
Lets try it:
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bandit10@bandit:~$ base64 -d data.txt
The password is dtR173fZKb0RRsDFSGsg2RWnpNVj3qRr
That was quick - we have our password :)
Password:dtR173fZKb0RRsDFSGsg2RWnpNVj3qRr
Explanation:
Understanding Base64 Encoding and the base64 Command
Base64 is a method of encoding binary data into ASCII text format. This encoding is often recognizable by the equal signs (=) that appear at the end of the encoded data, though this is not always the case.
In Linux, the base64 command is used to encode and decode data in Base64 format:
Encoding Data: To convert binary data into Base64 format, simply use:
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base64 input_file
Decoding Data: Like in our example above to decode Base64 into ASCII
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base64 -d input_file