.text:00401C00 summerrush Reverse Engineering

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Summerrush

A reverse engineering CTF authored for competitive play.

; writeups

Adventure Time

Fixing a corrupted UPX header to unpack an ELF binary, then reversing XOR-encoded strings and file-path checks to recover the flag.

  • Reverse Engineering
  • UPX
  • Anti-Debugging
  • IDA

Hoogments

Spotting an init_array-based function hooking trick in IDA that redirects execution away from the decoy flag-check routine.

  • Reverse Engineering
  • Function Hooking
  • init_array
  • IDA

Pyshell

Decoding a triple-base64 PowerShell payload that leaks the flag as mouse-drawn Morse code paced by caps-lock toggles.

  • Reverse Engineering
  • PowerShell
  • Malware Analysis
  • Morse Code