1337UP LIVE CTF 2023

Placement: #133/691

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Thoughts:

I had a lot of fun with this CTF! I didn’t really solve anything extraordinarily hard, but my main accomplishment definitely was solving the crypto challenge Not So Smooth. Overall an awesome CTF though!

Writeups

• Keyless
  [100] <crypto/> <rev/>
• Not So Smooth
  [408] <crypto/> <xor/> <modular-arithmetic/>
• Really Secure Apparently
  [100] <crypto/> <rsa/> <wiener/>
• Flag Checker
  [100] <rev/> <rust/> <brute-force/>
• Obfuscation
  [100] <rev/> <obfuscation/> <xor/>
• Encoding
  [50] <warmup/> <encoding/> <base32/> <base64/> <hex/> <morse/>
• Flag Extraction
  [50] <warmup/> <rar/> <zip/> <binwalk/>
• Over The Wire 1
  [50] <warmup/> <network/> <wireshark/> <ftp/>
• Over The Wire 2
  [50] <warmup/> <network/> <wireshark/> <stego/> <lsb/>