Using browser extensions (EditThisCookie) or command-line tools (cURL), the attacker loads the stolen cookie and gains access to the victim’s session.
Because FaceNiff exploits unencrypted sessions, you can protect yourself by:
: Since almost all major platforms forced HTTPS years ago, the core sniffing technology behind FaceNiff is dead.
The application utilizes a technique known as (Address Resolution Protocol poisoning). By sending falsified ARP messages across a local area network, the application positions the host Android device as the intermediary between the target device and the network router.
Modern, Legitimate Alternatives for Network Penetration Testing
A VPN encrypts all your internet traffic from your device to the VPN server, making session interception impossible regardless of the Wi-Fi network's security status. As CSO Online recommends, "HTTPS is your friend. It is way past time to start applying major public pressure in order to force sites to use HTTPS. Or perhaps time to get serious about security and use a VPN".
These files typically contain:
Tools available on the Google Play Store (like PCAPdroid) allow you to monitor traffic from your own device, which is safer and more educational.
: FaceNiff generally cannot bypass SSL/HTTPS connections. Most modern websites use HTTPS by default, which renders the tool largely ineffective against secured sessions. How to Protect Yourself
: Malicious APKs use the guise of an "activation crack" to execute code that steals your personal data, banking logins, and private messages.