Download Viber Voice Message -

# AAC header pattern check if data[0:3] != b'\x00\x00\x01': print("Warning: Not a valid AAC file. Decryption may have failed.")

with open(out_path, 'wb') as f: f.write(data) download viber voice message

Published: April 18, 2026 | Reading Time: 6 min # AAC header pattern check if data[0:3]

print(f"Decrypted: out_path") if == " main ": decrypt_viber_audio(sys.argv[1], sys.argv[2]) navigate to: /apps/com.viber.voip/ef/

Viber uses a simple XOR cipher with a per-device key. Tools like ViberAudioExtractor (open source on GitHub) can brute the key because the header pattern is predictable. Rename the file to .m4a after decryption.

adb backup -f viber_backup.ab -noapk com.viber.voip Once you have the .ab file, use a tool like Android Backup Extractor to convert it to a .tar file. Inside, navigate to: /apps/com.viber.voip/ef/