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Defcon 17 CTF Quals: Materials and Solutions

Previously, i mentioned about myself taking part in Defcon 17 CTF qualifiers for the first time. So on this page, i shall present to you the materials and some of the non-official solutions to the various challenges that were released during the qualifiers.

Latest updates is that VedaGodz had finally posted their solutions at their website: http://shallweplayaga.me/

Pursuits Trivial

• 100
  • Clues or Materials – Name the X files episode that focuses on a hacker con.
  • Solutions – N/A
  • Answer – Three of a kind
• 200
  • Clues or Materials -
    pwn2.ddtek.biz:1984
    Find key for me please!
    Password == TWEETtweet
  • Solutions
  • Answer – Ero – The sexiest panda of all!
• 300
  • Clues or Materials
    pwn2.ddtek.biz:11511,
    provide 200 valid solutions in a row and you will get a prize,
    but you better be quick! Password == MAZE4J002PLAY
    
  • Solutions by Bryce Kerley
  • Solutions by The Art of Approximation in Science and Engineering
  • Answer – Shellphish are the AI masters!
• 400
  • Clues or Materials
    Doh, an oldie but goodie. Find password please.
    105f86deaafc709c9746a33634f1dbd
  • Solutions by The13 (Korean)
  • Solutions by Adc from lollerskaterz dropping from roflcopters
  • Answer -

Crypto Badness

• 100
  • Clues or Materials -
    ASI JL DUJZTED SA J EJZD JVV NBTODI, VDD FOD AHB VBFD: OFFT://YYY.AHB.MSK/TJMD2/CDN08/NSCD_122908.OFZE, PSQD GSW MWDVV? LS, JNFWJE AHB RWBX.
  • Solutions -
  • Answer – fideltybravngchjkqopxsuzwm
• 200
  • Clues or Materials -
    All your teal vpn are belong to us!
    a00ae12bc490c35c1a13c061a3e643a
    
  • Solutions -
  • Answer - C1SC0r0×0rz!!!
• 300
  • Clues or Materials
    If your gang’s pretty good, you’ll work your way in.
    354d8654372c0e5fff66803da7d9dfe
    
  • Solutions by The13 (Korean)
  • Answer – The eggs are not a lie. NOT A LIE.
• 400
  • Clues or Materials
    pwn11.ddtek.biz
    eb24fae687eaa7d4441e727cf892bea
  • Solutions by hahah from beist (Korean)
  • Solutions by LifeAsaGeek from Plus
  • Answer – Anal leakage beats key leakage a
• 500
  • Clues or Materials -
    pwn5.ddtek.biz:9999 (For entertainment while solving)
    video:http://www.youtube.com/watch?v=ew9YQVRSlHE
  • Solutions -
  • Answer -

Packet Madness

• 100
  • Clues or Materials -
    Exceptions in comments make exceptional passwords.
    a9366acd80efa0aa78c2f76d9702f03
  • Solutions -
  • Answer -
• 200
  • Clues or Materials -
    Howie doit?
    042c1c6fb808903c6a1e6246bae6eef
    
  • Solutions by The13 (Korean)
  • Answer -

Binary L33tness

• 100
  • Clues or Materials -
    Waht is the password?
    f414376cc2322d4ad4c5cd364e89fd3
    
  • Solutions -
  • Answer – visilooksgoodinhotpants
• 200
  • Clues or Materials -
    Name the algorithm implemented in this file. Note that several smaller
    algorithms may be utilized in implementing the overall solution.
    The answer is the overall algorithm.
    478f0845e1bbd20159b96908d00e120
    
  • Solutions -
  • Answer – Huffman
• 300
  • Clues or Materials
    The answer is the 16 byte decryption key used in the
    file linked here. Enter in the form: \xaa\xbb\xcc…
    4b2c8b145e30208d00d7ddebd703456
    
  • Solutions by KOrUPt from Sapheads
  • Answer – \x87\xD3\x4E\x03\x34\xEE\x56\x87\x1E\x4C\x86\x67\x1B\x05\x23\x15
• 400
  • Clues or Materials
    The answer to your second questions is ‘by hash’.
    
  • Solutions -
• 500
  • Clues or Materials -
    Help, we lost our assembler and manuals.
    Assemble and run the given code on the given interpreter
    and you will get a prize.
    (Binary) 7dbdb66e5746a210a559d40c0233c31
    (Code) 15e2a08a743336e972c31c5d9964649
    
  • Solutions -

Pwtent Pwnables

• 100
  • Clues or Materials -
    Running on pwn2.ddtek.biz
    08f8bfd7e119bd5bba941a14bb00d93
    
  • Solutions by Thor (Spanish)
  • Answer – Hacker Joe Where Are You?
• 200
  • Clues or Materials -
    Sometimes a sassy packet is a good packet.
    Enjoy http://pwn5.ddtek.com:8080/
    
  • Solutions by Adc from lollerskaterz dropping from roflcopters
• 300
  • Clues or Materials
    pwn23.ddtek.biz
    da6d6bf2e2058ec98f67bf6b0e608c7
    
  • Solutions by LifeAsaGeek from Plus
  • Solutions by Xpl017Elz
• 400
  • Clues or Materials
    pwnie.ddtek.biz
    
  • Solutions -

Forensics

• 100
  • Clues or Materials -
    Recover the key
    6db079ca91c4860f78bd096b9db3067
    
  • Solutions by Thor (Spanish)
• 200
  • Clues or Materials -
    Provide the key in its original, unl33t form.
    70b06421d874ba02b7b50f575759cff
    
  • Solutions -
• 300
  • Clues or Materials
    One of these things is not like the other.
    
  • Solutions -