mobilemedium
APKey
hackthebox
Task: Reverse engineer an obfuscated Android APK to decrypt a hidden flag. Solution: Decompile with jadx, trace obfuscated helper classes that build a Base64-encoded ciphertext and AES key from character positions across multiple arrays, then decrypt using AES-ECB.
$ ls tags/ techniques/
aes_ecb_decryptionapk_decompilationcode_deobfuscationstring_reconstruction
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