/writeups

CTF solves, RE breakdowns, decoygrid dev logs, research notes. Published as finished, not as polished. Free to read, always.

• 2026-06-29 decoygrid dev log #002 — SQLite state and the polling loop
  Persistent state landed. The polling loop now survives restarts, and connection attempts get written to disk instead of stdout.
  decoygridgodev-log
• 2026-06-25 Android root detection bypass via Frida
  Three layered root-detection checks in an APK, bypassed at runtime with Frida hooks instead of patching the binary.
  androidfridare
• 2026-06-21 Reversing a license-check crackme with Ghidra
  Walking a serial-validation routine backwards in Ghidra to find the exact arithmetic a valid key has to satisfy.
  recrackmeghidra
• 2026-06-18 TCHon CTF 2026 — baby-rop (pwn, 250pts)
  A no-PIE, no-canary stack overflow with just enough gadgets in the binary itself to build a working ret2libc chain.
  ctfpwnrop
• 2026-06-15 decoygrid dev log #001 — starting over
  Reviving the decoygrid honeypot tracker from a half-finished state — what exists, what the actual goal is, and how I'm approaching the rebuild.
  decoygridgohoneypotdev-log