[Reversing]

Skipping Rope - Very Easy

  1. Set a breakpoint at jne
  2. Change rip to print flag function

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NumberCruncher - Easy

  1. Spot that it is a typical XOR pattern
  2. XOR brute force to decrypt

Following The Threads - Easy

  1. Spot the password in the program
  2. Use it to obtain a flag

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[Web]

TitanMail - Very Easy

  1. Register and login
  2. Play with template