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] <1337UP-LIVE-CTF-2023/> <crypto/> <rev/>
• Not So Smooth
  [408] <1337UP-LIVE-CTF-2023/> <crypto/> <crypto/xor/> <crypto/modular-arithmetic/>
• Really Secure Apparently
  [100] <1337UP-LIVE-CTF-2023/> <crypto/> <crypto/rsa/> <crypto/wiener/>
• Flag Checker
  [100] <1337UP-LIVE-CTF-2023/> <rev/> <rev/rust/> <rev/brute-force/>
• Obfuscation
  [100] <1337UP-LIVE-CTF-2023/> <rev/> <rev/obfuscation/> <rev/xor/>
• Encoding
  [50] <1337UP-LIVE-CTF-2023/> <crypto/> <crypto/encoding/> <crypto/base32/> <crypto/base64/> <crypto/hex/> <crypto/morse/>
• Flag Extraction
  [50] <1337UP-LIVE-CTF-2023/> <forensics/> <forensics/rar/> <forensics/zip/> <forensics/binwalk/>
• Over The Wire 1
  [50] <1337UP-LIVE-CTF-2023/> <forensics/> <forensics/network/> <forensics/wireshark/> <forensics/ftp/>
• Over The Wire 2
  [50] <1337UP-LIVE-CTF-2023/> <forensics/> <forensics/network/> <forensics/wireshark/> <forensics/stego/> <forensics/lsb/>