If you are concerned about your own security, ensure you are using the official WhatsApp application from the Google Play Store Apple App Store and keep your device software updated.
Understanding WhatsApp Sniffer v1.03: Risks, History, and Safety whatsapp sniffer v1.03 apk
This specific version number became legendary because it was the last "free" version circulated before the developers either abandoned the project or moved it behind a paywall. It gained notoriety on forums like XDA Developers, 4chan, and YouTube tutorial videos. If you are concerned about your own security,