What is it? @.@

Here is the place where I record some tactics about wargame, systems, and other security issues.


DRG - FIRST 2013 Challenge - Network2 500


Network2 500

What is the challenge?

  1. Th1s i5 the DRG cha113nge
  1. First, we got a .pcap file named "e4a33f65d429e48819c842d745c0af18ce6c6cb95063de12116f29fb1d455506.pcap" from the challenge website.
  2. After we opened it, we could discover that there was a PNG image file inside the pcap file.

  3. Saved the raw content into a PNG file. Opened it and we got a QR code image like below.

  4. After we decoded the QR code, we got another base64 string.
    Tool: http://zxing.org/w/decode.jspx

    Base64 string:
    VGgxcyBpNSB0aGUgRFJHIGNoYTExM25nZQo9PT09PT09PT09PT09PT09PT09PT09PT09ClR3aXR0 ZXIgaXMgYSBncmVhdGVmdWwgdG9vbCB0byBzcHJlYWQgeW91ciB0aG91Z2h0cy4KWW91IHNob3Vs ZCBiZSBjYXJlZnVsIHdoYXQgeW91IHR3ZWV0LgpAdG9tZGZjMQo=
  5. Using online tools to decode the base64 string.
    Tool: http://www.motobit.com/util/base64-decoder-encoder.asp

    Th1s i5 the DRG cha113nge
    Twitter is a greateful tool to spread your thoughts.
    You should be careful what you tweet.
  6. We got it!

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