Cryptography Warm Up – CTF challenge

Here is a starter problem for everyone. Since you will be using computer to break my secret code, I am giving you the encrypted message in many forms:

  1. Hex: 0x540x680x65 0x730x650x630x720x650x74 0x690x73 0x6f0x750x74
  2. Decimal: 084104101 115101099114101116 105115 111117116
  3. Binary: 010101000110100001100101 011100110110010101100011011100100110010101110100 0110100101110011 011011110111010101110100
  4. Base64: VGhlIHNlY3JldCBpcyBvdXQ=

Have fun solving the secret message!

Steganography Example – CTF – Chicken Curry

OK, in this Steganography challenge today, I have used one of my favorite dishes – chicken curry. This image was taken in 2013 in Bluefield VA at my house. I have hidden another full image inside the chicken curry! See if you could solve and extract the image. You should try this dish for a blind date!

MD5 hash of the hidden image is : 99860294e16ee4444b8edc407e6dae1b

Good Luck.

Top 10 Wireshark Fileters

I found this youtube video very useful to learn some of the most common WireShark filters.

  • tcp,port == 443
  • dns or http
  • ip.addr
  • ip.src
  • ip.dest
  • tcp.analysis.flags
  • !(apr or dns or icmp)
  • tcp contains facebook
  • dns contains facebook
  • http.request
  • http.response
  • http.response.code == 200
  • tcp.flags.syn == 1 [ useful to identify SYN attack]
  • tcp.flags.reset == 1
  • sin && rtp