WindowsSpyBlocker is an application written in Go and delivered as a single executable to block spying and tracking on Windows systems. The initial approach of this application is to capture and analyze network traffic based on a set of tools.


To capture and analyze network traffic for the telemetry option, QEMU virtual machines are used on the server virtualization management platform Proxmox VE based on :

  • Windows 10 Pro 64bits with automatic updates enabled.
  • Windows 8.1 Pro 64bits with automatic updates enabled.
  • Windows 7 SP1 Pro 64bits with automatic updates enabled.

Traffic dumps are clean every day and compared with the current rules to add / remove some hosts or firewall rules.

Tools used to capture traffic :

  • qemu -net dump: capture
  • Wireshark : capture + logs
  • Sysmon : capture + logs
  • Proxifier : logs

The data folder contains the blocking rules based on domains or IPs detected during the capture process :

  • extra.txt : Block third-party applications
  • spy.txt : Block Windows Spy / Telemetry
  • update.txt : Block Windows Update

Firewall and Hosts data are the main types. The others are generated from these as :

  • DNSCrypt : a protocol for securing communications between a client and a DNS resolver.
  • OpenWrt : an open source project used on embedded devices to route network traffic.
  • P2P : a plaintext IP data format from PeerGuardian.
  • Proxifier : an advanced proxy client on Windows with a flexible rule system.
  • Simplewall : a simple tool to configure Windows Filtering Platform (WFP).

Download WinSpyBlocker


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