Apk Time Graveyard Pin 'link' May 2026

return (pinInt ^ timeInt) == 0xDEADBEEF; // Wait — this is suspicious }

objdump -d libgraveyard.so > disasm.txt In Ghidra, locate Java_com_ctf_graveyardpin_MainActivity_verifyPin : apk time graveyard pin

This assumes the context of a CTF (Capture The Flag) or mobile security lab where an Android APK contains a hidden “graveyard pin” mechanism. 1. Challenge Overview Name: APK Time – Graveyard Pin Category: Android Reverse Engineering / Mobile CTF Difficulty: Medium Objective: Find the correct PIN that unlocks the “graveyard vault” inside the app. return (pinInt ^ timeInt) == 0xDEADBEEF; // Wait

Use ghidra or objdump :

The APK presents a numeric keypad. Entering the wrong PIN shows “Rest in peace… wrong PIN.” The goal is to extract the correct PIN by analyzing the app’s logic. First, install the APK on an emulator or test device: Use ghidra or objdump : The APK presents a numeric keypad

pin ^ time = 0xCA7 (within low 16 bits) => pin = time ^ 0xCA7 But pin must be 6 digits (100000 to 999999) and digits sum to 24. Suppose current time = 14:45 → timeInt = 1445 .

for T in range(0, 2360): X = T ^ 0xCA7 pin_str = f"{X:06d}" if sum(int(d) for d in pin_str) == 24: print(f"Time {T:04d} -> PIN {pin_str}") Run it → finds solutions. Example output: