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Wannavmbe - InCTF Internationals 2019

Freakston
2019-09-30
Reversing / Windows

Intended solution of Wannavmbe challenge from InCTF Internationals 2019

tl;dr

  • Challenge is a VM.
  • Reverse Instruction types and implementation.
  • Understand that it has a fucntion which takes the base64 of CWD (Current working directory).
  • Find the corrcect directory where it needs to be placed.
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VM Windows Reversing Automation

Signal VM de1ta (Part 2) - de1CTF 2019

R3x
2019-08-09
Reversing / Linux

tl;dr

  • Challenge is a VM implemented over signals and ptrace
  • Reverse Instruction types and implementation
  • Use gdb scripting to find the executed code and get the pseudo VM code
  • Find out the algorithm (Max triangle sum) from VM instructions
  • Find an more optimized way to solve the problem (Or lazy solve it!).
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Linux VM Reversing Automation

Signal VM (Part 1) - de1CTF 2019

R3x
2019-08-08
Reversing / Linux

tl;dr

  • Challenge is a VM implemented over signals and ptrace
  • Reverse Instruction types and implementation
  • Use gdb scripting to find the executed code and get the pseudo VM code
  • Reverse the VM functionality (Hill cipher) for flag and profit
Read More
Linux VM Reversing Automation

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