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IceCTF - 15 - All your Base are belong to us - Misc

noraj (Alexandre ZANNI)
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Information#

Version#

By Version Comment
noraj 1.0 Creation

CTF#

Description#

What a mess... we got a raw flag but now what do we do... flag.txt

Solution#

  1. Look at the file:
cat flag.txt
01001001 01100011 01100101 01000011 01010100 01000110 01111011 01100001 01101100 00110001 01011111
01101101 01111001 01011111 01100010 01100001 01110011 01100101 01110011 01011111 01100001 01110010
01100101 01011111 01111001 01101111 01110101 01110010 01110011 01011111 01100001 01101110 01100100
01011111 01100001 01101100 01101100 01011111 01111001 00110000 01110101 01110010 01011111 01100010
01100001 01110011 01100101 01110011 01011111 01100001 01110010 01100101 01011111 01101101 01101001
01101110 01100101 01111101
  1. It's binary, so convert it to ASCII (with a python script):
with open("flag.txt", "r") as fh:
    data = fh.read()
    bindata = "".join(data.split())

    intdata = int(bindata, 2)
    strdata = intdata.to_bytes((intdata.bit_length() + 7) // 8, 'big').decode()
    print(strdata)
  1. We get the flag: IceCTF{al1_my_bases_are_yours_and_all_y0ur_bases_are_mine}.
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