Decrypt Zte Config.bin [TESTED]
Once decrypted, the configuration is usually one of:
Compressed XML (.gz): Use gunzip decrypted_output.
Base64-encoded values: Decode with echo "value" | base64 -d. Decrypt Zte Config.bin
MD5/SHA256 hashes: These are not reversible. Use a hash cracker or compare against known defaults.
Example of a decrypted XML snippet:
<InternetGatewayDevice>
<WANDevice>
<WANConnectionDevice>
<WANPPPConnection>
<Username>user@isp.com</Username>
<Password>7B4F3A2C1E</Password> <!-- Often hex or base64 -->
</WANPPPConnection>
</WANConnectionDevice>
</WANDevice>
</InternetGatewayDevice>
This is more involved because you need the device-specific key.
Method A – With serial number (easiest): Once decrypted, the configuration is usually one of:
Method B – Without serial number (brute-force/forensic):
Some tools can attempt to recover the serial number by analyzing the known plaintext structure. For example, every config.bin contains predictable headers like <DeviceInfo> or <?xml version="1.0". A known-plaintext attack can XOR or backtrack the key. This is computationally intensive but feasible for short serials (10 characters).
For security researchers, the config.bin is just the beginning. The ultimate decryption key often lives in the firmware itself. By downloading the official firmware from ZTE (or extracted via JTAG), you can reverse-engineer the encryption routine. Compressed XML (
Most modern ZTE routers (F660, F680, F609, etc.) allow you to backup your configuration. The resulting file is usually named config.bin. However, this is not a raw binary dump of the settings. ZTE encrypts and compresses this file to prevent users from reading sensitive data like:
To decrypt config.bin, you must first identify which generation your router belongs to.
