Selfishnet V0.1 Beta • Full Version

SelfishNet v0.1 Beta is a Windows network monitoring and bandwidth-control tool that inspects devices on a local LAN and lets you view usage, block devices, or throttle bandwidth per device using ARP spoofing and Windows packet APIs.

This was where the tool moved from "annoying" to "dangerous." SelfishNet could intercept a target’s DNS requests. In v0.1 beta, you could redirect all traffic from a specific IP address to a different website. For example, when your neighbor tried to go to google.com, they would land on a fake login page you hosted. selfishnet v0.1 beta

By 2008, most antivirus suites (Norton, McAfee, Kaspersky) began flagging SelfishNet as a "HackTool:ARP" or "Riskware." It wasn't a virus, but it was a tool for malicious activity. Users had to disable real-time protection to run it—a terrible idea for any beta software. SelfishNet v0

Executive Summary SelfishNet v0.1 Beta is a notorious, lightweight network manipulation tool designed for Microsoft Windows environments. It serves a singular, destructive purpose: to monopolize shared internet bandwidth by exploiting the inherent trust and vulnerability of the Address Resolution Protocol (ARP). By positioning itself as a rogue actor within a Local Area Network (LAN), SelfishNet allows a user to throttle, block, or siphon internet speed from other connected devices, effectively prioritizing their own traffic at the expense of everyone else. Executive Summary SelfishNet v0

While often labeled a "network optimizer" by its users, in the cybersecurity community, SelfishNet is categorized as a Man-in-the-Middle (MitM) attack tool. Its release marked a significant democratization of network abuse, moving ARP spoofing from the command line of Linux hackers to a clickable GUI for average Windows users.